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 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 0x7ee1260af08d6f62db2b471d62a2551283fa4d6a5867ccc87bcfd987cbf9b75c. 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/4daf5b58-1342-4734-9d65-abfbee815051.json and https://artists.proofprofile.net/proofs/artist/4daf5b58-1342-4734-9d65-abfbee815051.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 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 0x1bd823c35e5ad069541011dce39f56dad36719448b5332e6dba4f30a60b2fc3d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SE6I32108453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51578514b453bfe077b4749d62d15b5da76524000ceb5b7ef2648854a20e9e0. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SE6I32108450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf944beca09d45cb7ce618480e582d995422ed89e6877e5532096f91cbe9bc810. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/TCAFY2172378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c9b8cdaa931e31de01d515bf94ed6ff80e94cf823f5836d55cb482ed0e190d. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/TCAGI2283419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50a86365a36e8f6231967a01d3f2b2252f50f428ae19118fea63e1e70983b25. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE6I32328926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927e1d4763a6273b9ea831dbec03e17229a608737d1f12331d176146209e9c77. 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/SE6QE2347394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62d9de21b8b17ae218aa758fbb44c8e0383315e72df379f4ce663f7fa8c00b0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6QE2347395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce461edb19d266444a4797b64b975a3e5a49043e917f30f3df1d829c26e3dbee. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/SE6XY2337683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba19cf2c651eccd2be8aec09c7619c3bf99b0dd0ac816593234bf44a60b94eb. 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/SE5BU2408896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f513c6432e9d7a8b03488c47208b26240a3093ea4da68ed178242eb20669cb. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/SE6SA2417783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e75ea42acaf5b1ca71bfbb8ef43f6649752c09dc83e555a88f594f72a30bf71. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6SA2463379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0ef17309810e87e0b6112a79f0061dd598f3cb9f4f2cd97d238608ebc4a975. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/SE5BU2541399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c64b83c8367d7fe69e732cec53f17c3a107657657305426b0e67758fd6fdad. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6XY2546220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15edb36b71a7b614882489c83826892e5b53e088a16e7184f1286e82429b2cb. 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/SE6XY2546221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fd94bd0716c7183be8b7d1f1da25087d966d28532075e02050bbb5798a6cc9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6XY2546222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb68362ff4b85cf9779a8185c7e2abf1e2851178ab4054ba5be6c461d0819c00. 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/SE6XY2546225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda39572cdec74dc439d85d243e28c00f80b9ca805c23777b14a33ac0bc4ecef1. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/SE6SA2482777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9e2277fd2ca09206df759e76e8d8cb23d2e8d4214429dcf0989fce428172de. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/SE5BU2541423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c64b83c8367d7fe69e732cec53f17c3a107657657305426b0e67758fd6fdad. 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/SE6XY2546220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15edb36b71a7b614882489c83826892e5b53e088a16e7184f1286e82429b2cb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE6XY2546221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e012eaf77f08de20af93483cca21493829c9d8b8e324d967b2b82f4960f4e78. 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/SE6XY2546223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480402b03ae66d94bf2b2eb1bce3b95df9ea24f476c30861153d7ff3d077f48d. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/SE6XY2546224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb68362ff4b85cf9779a8185c7e2abf1e2851178ab4054ba5be6c461d0819c00. 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/SE6XY2546225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda39572cdec74dc439d85d243e28c00f80b9ca805c23777b14a33ac0bc4ecef1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/SE6SA2482777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9e2277fd2ca09206df759e76e8d8cb23d2e8d4214429dcf0989fce428172de. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/SE5BU2541423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ddd491aa23e6d37c6fa4aa42c1f054ccc6b26612d9bfc651255fbf70d06cf5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/SE6XY2546227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cfaeadf40f9a106456beb56ac40c5b3de7f744cc785e49bfca4945c26eb21a6. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/SE6XX2500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f36433ad11ea3680babbb8e004394d983b5c74a817166dfa91fc8a68b36883. 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/SE6XX2500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ba8f0fee12e26805e93137736aa844de4bdf24426c367e5e9ae0cce1f1b4f1. 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/SE6SA2556309.