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 0xa3a9dc8f77977611bc9c0f9f82608248ee6f5082e21973a67e12818720d641e3. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/279d43ea-c0f8-45ba-b865-9e322459860e.json and https://artists.proofprofile.net/proofs/artist/279d43ea-c0f8-45ba-b865-9e322459860e.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 0xa9611fd65d039d716a67f9d02087fc98e9cc4223dc3e3bc32f22f008518e6f44. 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/CH6542186026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd009774a68acd036f9f98b78942e9b12075cd8877d811bc0ab2d5a1b1b50c0. 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/CH6542186028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805d3648f5888187097acdc7d78fd5864da2bc467c9ecece401efbd27fe7e897. 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/CH6542186020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912c3f859b3e0043783fc711ae601680414c8f7305e7212346f5bbaa4181358c. 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/CH6542186018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde18c3550a3353f11b90638722051dec651b6602695af90151f9ee7f156e452. 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/CH6542186022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf476fcfc059748d40ef9c50fd20b44e6c11abccdc7299c494df122669ccacc. 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/CH6542186019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa246d219288fe1df7311dc2233930bf6433d5b040bf7224df1c1eab9392b164f. 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/CH6542186023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d74561ff468116cc8bc6efdbcaf9aaba68ee60253dd66174a83f22939e0e31. 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/CH6542186025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b392c110d2cc27b19aae9e9f8bb97db90aa68b7faf2ee790a5e8c8884b85fe2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CH6542186027.
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 0x0af95badffc6a3ef680ed1f1caef54f576c92128c8db5b05986639608653c992. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH6542186029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769e239fc3da477879899d2a34b65c3f7c182d925b1f3dc94f71b49924b97627. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/CH6542186017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38ed7ee7d29377c6fa63d6f2c190a628d72e6eb7726de03e3e31c19a08aec3e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CH6542186021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3091106aa75fad942751367d9bb3b3552ff4ab00a210cc85ff6c90fc339d7594. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CH6542186024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2be9c564dca17684734176171cec6cfc19329332bf4634f7c1b1fdc51f3837. 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/CH6541761934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd9584b43ac0dbbd418eaad4c8f9989647e0db2acb75530cb3af12be18b6557. 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/CH6541761935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7090f843995cb88988fdb8b35ed8558fe3f7fdf111970f193e4d5ce48ad9d331. 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/CH6541761936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea74028b81d2aabe79f5715afc09ea3080e574698738d2efb0d2474dd998edee. 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/CH6541761938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14ebc26243e5a020c080f9c701c754b64d52b516725c571560554bc5e2fb6a5. 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/CH6541761939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd578b910bdb01b416bbc73a47829cc6e7ff7bc962cd282ca32e799078ed09e8d. 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/CH6541761941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7e489cb33a848cb2078afc59071475f670e81494163f852f7aa342c9f6b2ec. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/CH6541761932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff176a6cb933da8ac23f22e3248e47c2cc68f4d7f8ce388d3f3479a404c27ae. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CH6541761933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9fd82f62e40abeb0b00a061118db04be8a66bc0ea683aa4860477e560e8ef7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH6541761937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6804fdd3ef7cf700e0f729ddaed9a87835b760b7b4dfbbf1017a012a3e8af042. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CH6541761940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe4842319b2f0ded4c9c4bf3f24f551e9fa077e0f70e5a7405a9edb6731ec79. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CH6541761942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63e6fb4bf7a85b6a35412f85a975e597ccb2535e3507b3f577ce7321629573a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CH6541761943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dc73bc88ac656362af6ba9db1ec510efbc851f1a8a2b0dd9a725e337567c08. 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/CH6542177907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68deffd0aa4cd19ecfcac004d60927ab717edd58ba0d5c7e5da71d2fdb2a6dbc. 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/CH6451504312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf06b81e51388152a2b9b8d517c10f6b7d72b5ffc7c0a597596c9f6c28cf2568. 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/CH6451504314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571bdb11c2ed9ff0e42d02b9bf92e4be7ec9413138da28cbab2bf795fcdc3f28. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CH6451504311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b14afc6c58d830e1a094384679288d166e96f8681b68f83f5c19fcff22c478e. 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/CH6541826827.