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 0x9c3bf45b5dc34f69bf95d16b1b687cdbbea54dbc48e1d7edc67b0170ca78aabd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c626b5b6-9107-4a9c-9f19-34f1cc65ef09.json and https://artists.proofprofile.net/proofs/artist/c626b5b6-9107-4a9c-9f19-34f1cc65ef09.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 0x03f86f34532b5efd1507a79fea389bd99e84ced6999d9123b7bc9d572b13d7f6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZHN32065107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3091c33d99d554df61faa3f7830e5944c2a82f72ebf75d31b2c8552422140044. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN32065110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cc8b4bed48dda10882f0a5083fec3a64b2e91141eb90f7f6b2a2021cdac144. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T03:53:53Z), 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/QZHN32065111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdf61c6788fb4797a639a42047dc960bea4959937099ce3d1ff719e9e1cc843. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN32064421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93ce095165f33185c0469505f82f474877ff6903901833e85cd770a3332e700. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZHN32064422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2e8295c442481567e68a1e36ef143f05c0ef1408e787cc62fe1a52d5a6cd2f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN32064424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeafa0615b8bd1ed3bd22a1efb98df54053608e759f14cec4b960e53782d74602. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN32064425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46eb3a4c21b059d1c6773bddac2fc278aefd7dc468719e908400786df43c6d95. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN32064426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c475b9d949abdcc873fbcdf94637b3f08fd8aea24a22b02b382a32f3f862c35. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN32063934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c20e72e70ce527bed73da6c76f91ac955b30282e9c6dfee81f4d1a130694c2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN32063936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818d84acbd5280056554ac73305a41dc17020621f9203189cb7a2d6e92c1b5fb. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHN32063937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058eaede56ecc8138528b72adfb757f47428ba9e3a93c5eecf8501b9aa64991c. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZDA42307604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43207a0b6441387d0f7ed2319a8d5fdca7f568f0e298f40bcf58a9ba5b8d901e. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:49:59Z), 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/QZDA42307610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa31ef34d99ee750c1a75682dff11cd6915885ba1d5c7c7835ae000be7d5ad56. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZDA42307613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5bc1e5c07c7305f7843b46459e7660a09eb2e5da7b14a843eae79924a8774e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:05:02Z), 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/QZHN72347966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5c7260e817638e8eacc5b913e05910e09de9335cccf1924277323f332ee28f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTBC2364706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720d59b11bf23541193b0b11e494e058fc5e6e6c109193b7637e1aeffc9ffda2. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:48:19Z), 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/QZTBC2364709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d646e6cdf46d6a626eb7aa87bcd7c153d99c6fbf93ad02bdccd0daa862d5b5. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTBC2364710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99495a11fb8f5179cb1dcd37e2b463af113724875401fc9a916d1507a276170. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZWFH2357239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a6a1064ee4e698dcd6380df37a137cf1db4af6de35c08c55ae25c63bdeb261. 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/QZFYX2440442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1689a89331353f57c2f7fc905cced02ad4cf96a5bc00028137dc8c133799153b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZFYZ2446569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070b12fa63ebf34c1d2ab291c066f00f62d5ee006d9338bfc7c80c2d538c7fd1. 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/QZDA72442101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aaf4b6cb26cdae605397748d2142a121e6f783ac941a67dd7e56451c4a2b62. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES52424698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54aa5047d31f8b3fe081e6d3d086774c75e7895d4c5e666e7945601f1c3c1c6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6F2498853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe769b18ff966e3b3383410f17c34bc4ad321ee8ce6ece0f09f8f25cebe3c961c. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:27:09Z), 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/QZWFS2451548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1ace22ef0b418aca0b12bd1606757027188039f26f53aaa167bc933640f921. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZWFS2451549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5693bba7211e40eae25bda067b11dc42dbbad0ed83d8dbb707d2ae1244bda66e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:19Z), 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/QZWFS2451552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38661699331bbeaf5f99dd3a96a7a1d3f74794ce35b106a003bfbf1faad6f4a8. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:44:47Z), 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/QZWFS2451555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d97ee4aea2a8969201bb76eb2fcdacbbd0d6f6fb072abd3837f1ec5ff00317b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:39Z), 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/QZWFS2451556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6243cd4e28bbeeecb3cb53f65849e22f878c88793df1aecd0a88b25b8d12f6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFS2451559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9b3c1bb6666837b6064ed188ccc537d3648a7a21c9992f279ec440adbc03cd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3F42403176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2524f18d50bc1b1c81080553ba8ea7b77b14a8ae66c318d0fe093d0f683c0ed6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT3F42403178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c438eff81d27c7f2f02a514884d2a5aec70560899c88f17d388093bd3ddc5f3. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:29:25Z), 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/QT3F42403183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62548ac0f3e6448b3577fcbc6c0a6cb7b43e2a7dc5d3d91370bf956abbcc0b7c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3F42403184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e90b8599049852439201d4d055f8af0411da62cb3308e911421de23530f728. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZK6N2533942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeec2ccc9196aa6c60b5d31f2196a0a98df8ddef9e3665db0f19f53300e9177f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6N2532632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020311046a74056f146a88386138e02f13b31b13291366038775506735067e28. 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/QZTBB2325794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455839cd3cc4b505a421a19e95672524f63ac47107c49b916c5250be39c31c94. 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/QZTAY2480951.