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 0x96452a83856c949537c09819838607b7a87abb03a1a91a82eb63876ae2051565. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa3fcd7e-f723-4b8e-b2fd-143429739244.json and https://artists.proofprofile.net/proofs/artist/fa3fcd7e-f723-4b8e-b2fd-143429739244.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 0x0669e219e267b10ecaae587adf0812a0c3a2a7cbad43951e164f660ad0841eb4. 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/QZHN81984876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2b9d149fec5802eded62cc23e9ef3fcd4ec8efbaf1d82a8d531884a3163087. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHNB1936642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc811c4cab57e2b350a027b17f98d70969b2565822e4e57228477f99dd17a70. 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/FRUM72201558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e92e7920d99e361b509eccf04e0a44a12773e8fc5d4d8f319d4d2a29ef0d4f. 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/FRUM72301138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c592c3261bb2345925b56c7de50e3570286b6df1f9a25ab4fd5ca4bb4de1c3d. 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/UKZGC2307374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a5b5360dac2720feb4734b02d63edb5062793fc49c775b4c0e974d82c7c60b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR9W12217453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812c656bdff0475284e945ddbdc5233da5bba57720a23155cae70f7e43ed95f6. 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/NL1LE2001485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34db7ddd6b0f1ecd662a4ac8af17437dcdf5a64cad20ed36b33808d216c35dfa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAEN1970748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9883cc0987251884a6cb2cb3821529152ecd593eb6ab2ed24939c7e267c48909. 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/FR9W12218350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1d9edb2e89e64ff5b7d42d5a7e6fd725b06cf1181599de443dcfbd0320f1d4. 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/FR9W12218352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce9e2eecd41f1891ec65ef62bb7f059ffcc3c10091ef1f229c39030fde9bd5bf. 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/FR9W12218359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39840fe510a73c80fdd75744fcb3e3acdf9978a5a92529fb73a33bc9d6f3e9a. 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/FR9W12218364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe086a015e1795eba37541bcab308b53b9915a874793da305a02e22eea5b5c21. 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/UKZGC2406292.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac6dc210245aa3805194ea8f86c712e4c218becd6b1a46efce0a187150f6b4b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UKZGC2309070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b75d04113c95571695e9b039761142398c9b09f9b5950485dc795ab77ebfd55. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAES2036614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7abe2444a8faeda17a42e62db7a40e606641a793103e9ea96d6fa819b6f0a9. 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/NL1LE1900125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4addafbe6ff4e714d5f0adee73950cf7634257bdc9bc77151fa2798f068970be. 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/TCAEY2087625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52b0b8c90f6f64776c9aec353a4d2313ccc37bb6b67b3a8ef6eea067fd72dcc. 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/GBKQU1978827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f3355d1c71abec14f674c4f0e1ef54d1459b614de82346afc447ced3f63619. 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/FRIDO2314073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966d70771a38a8b1e160fc15a3433065bc6f338a22f13040fd429704f53c6f0e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBKQU2094049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45a48f9ae701be0323d099dbe2e536b08b6f8899358bb2b6ecc8be3610869fc. 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/FRUM72201302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e985f21c9801cef83c8da9bde48aab6d4cddbc6c2881e6c872ea76a8db39f5. 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/FRUM72201383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11a7bd097ee7b91e58d1ca6db2a2ffee0aea5e2f574c4d302457e79adc91e48. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZN882135005.
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 0xd73acdb1f964d70348597be0df9178d837ad6a0bbe03899c09908bc62eee61da. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CH6541885976.