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 0x19561c4616efdd1334f4975b03eacc0b1f1a9427a2082ba3223cfe3218159630. 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/aafc2c95-e869-4002-9c22-1db94e42fa21.json and https://artists.proofprofile.net/proofs/artist/aafc2c95-e869-4002-9c22-1db94e42fa21.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 0x3c3a38368caab19dae74b6eadf951e2574c476dcc0c100a64845aa885756c70b. 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/UST8K1622875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ce93cb7ecd4e1f0b383527f688c916e60b478c3843023c353e3f9c92686349. 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/UST8K1753856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db09ee9d94cdd85b0ab0560f2ede7c635d5f87bc1982bf904f649d156643994. 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/QZDA61813255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c7b79f88e9217c217337f7d5e8694d93ed83a5efa69a3faac665774a2e57f9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZ4JJ1908506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401e8c2e91b03a5a887290e51aa67c9a665cfab743a683d58562f97cba9d2fea. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:30:07Z), 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/QZ4JJ1908509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c52a7662b4c61099ab9b637fa5eae9638ae1337a94a68795e3a4a44267b7cc8. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:23:35Z), 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/QZDA61915783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc633ee00aff91a41ae17ea04d10afd97c9fa693ee918c968da9424d5bbaba070. 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/QZDA71983379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf00cd79972c6f9e3ae8780becd21df10b9a57e77277331ad27a71fbdf8c80bd. 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/QZDA71983381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79c44cad39f183a7a903c9c7f83a5ca5e4f5e49ac7fad37ff3a3f1d5cbd9c0b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZDA71983382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4392977263bd8add55477ac0bb648c3e5a4eb782008ff4351836d400c188f422. 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/QZDA41948268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c346fe34899cd80312a5b88c603f40c901731e53fb06fa73b4d8c36d9985295. 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/QZFYW2034936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5ae9b854532b7ee2de294589fd89d1a863accedfa7443f2754040c4946f5c8. 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/QZHN92020718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8507ec243b8f732ae6931a794d5235e901b6926e0aff52148f13c507017cd490. 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/QZNWW2296984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5584bed57207c47748aca9e507df3f6100637d9807a8ce95fd544c23a597e6. 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/QZTAX2220665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b45017361b1ebceb26937ab755e70ad119c3e48442f5ce716d815318e5ddaa. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES52383730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d5422cc0e29b467ca47eb02030d62c1d44e30df99a5ffce9f4eb585eb7b6f2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:39:27Z), 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/QZRP42332496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf77cf8222af8482c815e53a98826556f31825ba3445e904ce89d11f0572122d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFG2453469.