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 0xfaa7618c1e9202997f6921acfbc07abb651eeb537a7742a46e47888ee0eb1a2d. 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/42f2b11a-5cc1-42c0-8350-bebb96e5a0f4.json and https://artists.proofprofile.net/proofs/artist/42f2b11a-5cc1-42c0-8350-bebb96e5a0f4.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 0x171ccce9f3603b3db32fc473718e369c859fb16abc74b2c4db88c988259b505b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ITA490600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd64e2b63879e29d7713bede8c8914f29ba4477dcdeec0ef93727d4ddd1d14c. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:39Z), 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/ITP660200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195764f54ce6ccae1fe18ddade11d2c299a3585835e338ad9d3abf91f7403795. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITP660200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bfcbfe5bd7e5f1f5a4ab3f3ddaf9e67f45000073709a6f04e0df30b5fc8717. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:19:26Z), 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/ITP660200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4e8374b3d71c9575f6e235129e8b9ed4ea22b83a85974d03b2af367a465257. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITP660200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05fa62cf3abf651db0e87e4873be5120532509a9b1d178bbf322699b95c083d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ITP660200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169c143cbf29999a5bb2beb61b3eea42e34d25aea019c770221d5643d6354fc0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITP660200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d5c18395aeec05af3056dbb84460b7d8c2872ee6ccc6067cbfac8d0d8af3eb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:08:41Z), 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/ITP660200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa043b77145aa27cc4c004d51ad3e17f28467b38076701b0acd1642b250ba6cae. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:05:50Z), 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/ITP669900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7515a3d0e3f3b85d3e204a0e71e82db1cf297b0d036af0f546e6b50118ba0790. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ITP669900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a5f5329e1df39127db46e2d988f43c11de6c42a9b60baf149ebf32f4647317. 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/ITL4Y2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00bde46a0b53ec27b388dd6ad741aa7aaca45d568f1879deed17414e77bcc63. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/ITL4Y2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2a51f344c780a6780e8bedb6d7d114993fcba479a5ecd28286eb9886a0ef23. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITL4Y2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f6f5e14dee5c10be1c25370306ce448e775ac48d17a22ba7eeb1d4a1ccd85f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ITL4Y2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819613489203285e74722a8717e28466cd6ae27c9b2af18efec8aa37865de398. 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/ITL4Y2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3bb199044bc25b7d1468521c3e5ee4d89548b6f35645bdba934e490ebf28dd1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ITL4Y2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7e1f22331cc5b2895846b5542e8e01751432dca8faecf6a2ebbf31e99672f3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ITL4Y2500021.