1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4531759af781851a44f69e1938adcb96d1291c1b94bac2206b4c4801f572853. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/169da963-a760-41d2-93bc-2c8b1dd289e7.json and https://artists.proofprofile.net/proofs/artist/169da963-a760-41d2-93bc-2c8b1dd289e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d7c7381a34275581ee4e8cc1284279701184e1ee7448b7d5a339987155a2a8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1705686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdc1fa90761e0e84e396b343455e580636703354801a5e988fd7c44680598d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04b2c8aa77446d96f64324758a207e141f96708b9911a4c68e6d301c070e5b4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b17a1a21faa72204c0002cb7bb1d8edd2613c12648e2ac76fd41d6e82a2b1c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c82ea32545252d2e7c76e14cc7b893474afe2e3b7a945541685e3885186378b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213675dd75342c6b01ad35034327fb8ce377102289c69c7cb549423e5249f85b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2ee2d261a8db2a4519eba3f331f8a677fe5ab7bf1a44750515f24f82985f14. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0180a94b8848db23ece8e250520e76a46079eb1be8b20e93ffd9b4dfd01d5d74. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a699fb0fd0a4968691cfc44e1b92783b35bbb1e92a8abf4501606bad5a49fa9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bce01c6239de9bea98d8f70b8f09a07eaaa7bcd6efd1340f3eeb8af7f00465. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b463ae5f4fe3bb1c2944013a07ec897b5bbba1807a200cfb39f5b3aeb1551d3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d9896f11e87f98663b5e289ba0fb90f1c6cfddbaa19f3c0ab8160b14b50bfb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1552249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75bfcf2c282a04bda8a55d1221315573d027760b272fa439d6e86b0dad53c01. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1552258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c818c01f5521dbc3ad09d1c1477d563217fb4cab6702c7ade95937c0f583426. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1552263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5c46c1fce0eaa21301c242c343f538fbd4e5f0a5dd4c42eff38c881cccb16c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1552264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a1cecf527e45bac22f8e5bee779c1ccbaa341b1a6ca9670b47f5c7eab145b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1552265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001681cf6c520b6d57c9c66ad6f50ff0a58193eda01639cfd2a73ad263de360d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7b8e46ec69316574fb6062b1c53da03479a665511abc875291c8a63aded5d2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aff54848c56b1e1d83ea7aae2eb1595350478f55b3f62a76019ca1cecc86c2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb0432db83cfae5688bd68c543457d4b92e05438187c1aeb68b74dd35532b7b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1557493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6413817062f9a5fbb6f4e3ff546e4e169e7fd555a432bb5baf0273a18d5b77. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1557502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6de37d7e6d3ada702cff8a158b23a017dda1aecfa234ad2b172dd79787bd6d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1552375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f04028340a574ba2b49a66e2027857fdbe6d3b144b3c9aa450b004df562dbb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1552383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9993ab2b6f9c918d97a7f4808d991a73903f02181edcd2f68a3adcd8133bee9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1552392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe17b63108c998dbe7cf3d895cda81b9184b193c443c33116c26ec12f9c8c5a6. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1552376.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037c69c5ffe3ef0f97f478de8c703ac71c43b66aa406f703085d62a0d41c1a91. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEYX82115751.
Tangorama: An Anthology of 20th Century Tango, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c5ec0ce1c491c1676fd28cb8dfda3b8d024119d6626c18df85807405bfdd99. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97abd3af09c05b3fd5f27c2866918292ef02ec6b2ccc19a20d1126eb9ff63ab. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9301d15e2deda7cadb5515939b49202e64d8f58cb32fd79ebfdd581c069ec820. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d38da237bc23ee1a70acb5b2c383c5a2ee0d1ddf39304e86eebe91794fbd83. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe954d708b44ad197ca070ef7a413bb4edfd1f189096fb0c9b2e83ef698f2b929. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8527086fa35616e32eb9744168e52f8527704681251f9463d9a3d57b9b5a3c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd707828088531bef247e3990bfb9b8f274b7b7fd0f442caf7889e39ca55b7c3d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f608cd1d911cd1814509c1b0cb93d9bc9b4cdca33817bc5578fcd3a2c6d950. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd643a78628e2eb137104d6b12568eecc23a633968e99675e71a231528882a316. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85217348d2aad58adb20d17fb232ecd5e457cca2e191c4be680998c239e3d7ec. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfee0f584950407158a1f3a4927f5aff5eb85e254d07405f0af7c0b4e688670. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a2524545dde37b2d2f710197251801f7e73aba07c2babf532ecb82c28f4498. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d02c1c6b17f41bba7940b82886c170627d301fd47f93130a23b07798ad8f450. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076c40b92b51c686bf000b90a5c71b9ae280334704e573496460446b95c9fcc1. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CA5KR1554498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e42d145912dd06dc6f819f86d84c509bddcf0c54431f92e861efe1c48f9a33. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71533102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5f7e394a5c6ea69fb3f2e92529d3976ad5dbd80901ce6edc0933e4ce739674. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71533103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd108a0c65b74a0ba6b2960025368cf9a5ccddfd71e818412218def90106d4a09. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71533106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d970eff3b5a85aa66c857e8c2a892688550cbc8b2e631d7a330f0e05b03f7e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71533108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8eea0bc69f4c9520011c5cffeb5b2dd558536a14aab862365ee2698341b523. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71533109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bd5d341fa0fb806105b9e36a2c8caafaaeea24134f6512965c74d1cd112955. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71533110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cef184ff7157259d55c562a3163846d7be4610d80a777cad0d2863f8bbb3969. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71533112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7099d9596a9c68270d04cb4de3c3d60e5fd27117d8706c2440d4618ff23aa9ff. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAQ71533113.
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Trio Hugo Diaz: Classical Tango Argentino
Tango - Argentinian Tangos arranged for String Quartet
Αnthology Of Tango Rioplatense (1913 - 1920), Volume 2