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 0xa27020bb7503145317b9296c12fd9f1e52bddc90553766643922799b72dd1337. 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/6e166f01-b56f-4f2f-bdee-fb33bba40cdc.json and https://artists.proofprofile.net/proofs/artist/6e166f01-b56f-4f2f-bdee-fb33bba40cdc.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 0x56633bd3a711f4852e18e2121c4a0eb2808d32257a3ae1b40afd2880cbc89b77. 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/QZTPX2264274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b6dadabc80b7a672932c9dc6b1e416ef62122f1d1674474fca1f47ca3ae0ec. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZGLM2311489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a154776d1991a895ebad1caeb90b7e676d7b71007c001284c921f7ede0150d1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZNJW2398691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae12d2caa71910891fa1f9a9ab4a3c450acc2a15c9722b68aef92f36dfef16d. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:34:43Z), 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/QZW9L2357699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cfa4e0f2cd8b8223126fb2a8c5d204269ede9e865b6d99d365fdb07f5cf869. 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/QZW9L2357700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652c63d25d532d86d1b1109b6ee10d4b6e79df20fae6f56f4f76026b31b52e77. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZW9L2357704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf953144c3fea6615e2d8b835ff84fa4e49a0c1b00342dbd4aabc3fe917a14858. 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/QZW9L2357705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5113accb143ea2b434be0e869208d52ec47adf67afbb29e51c6339f64d764762. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:32:42Z), 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/QZNJY2404418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ceab0fb327ce5d460248c30305f93b4ddd5915d4c41fcacebd9752aec5e684. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:51:52Z), 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/QZNJY2404419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d76f5b72e7a69e3d45e937b30a0504e466883cc251e27906869268b3db6e324. 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/QZNJY2404420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8e44f888fed3f7e8760b0ceaa96cb9b85e766c35f60b49f1a860a9fd875d0e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNJY2404423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36fe9b4f998166efe19cedfa098b58d1e9c7370d41a87ab9b4698c2a62a7b11. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJY2404424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9dfc8ab7b91a4921e348faf1ae7d970340f7608f125f0505ab5f6b41e878d8. 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/QZNJY2404425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f42ba3c2878ac2e425cae9bd8a7690038fb52b0eed98592baf8121ce2f2c4a6. 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/QZW9L2473922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5840bec06b306a40064a0e87d15ee1d45147596b52a2d3a78590b4362521146a. 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/QZW9L2473923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c740ecd61035dd5dcdd27bc7e267adef27ce2bbeb5aea8c9941f8eba3dac69e. 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/QZW9L2473925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2067c953db140c17235de30d88bbb2f5d5cbbe9c93506006174bb66158af1e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZW9L2473928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac2a1471d3fe66add3becbcabdb6f970dad66417387fed08dca9bb0523dc15c. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZNJW2556083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c44b6d0150e816d4bb6a6b086da11e77281b5cd8a2b3b4b3feea9cbf6c21ae. 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/QZTVM2548429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4462b93897bec67b55e93e6d3a05cb4d9e7da5ee2f083f23f75be76153a061. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTVM2548430.