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 0xc23ed19606d0b9c3fdb6d1861866c1b91e2576fe6d824fb38299eaaa1b370d71. 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/2e1bdfcd-f570-423e-9ee9-4e10b21bf03b.json and https://artists.proofprofile.net/proofs/artist/2e1bdfcd-f570-423e-9ee9-4e10b21bf03b.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 0x6f1d20c2b61455f1e9a20ee169e2cd0cb8280d27253e050c3af8f9c61f44f86b. 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/ESAAI0206251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf772e5311ba9120d76ea805483e34ae1494a2bf2bb3af7c81805681af9b96a87. 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/ESAAI0206252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa0b1ac769814f0d5ef14ed6bded73c8df23ab26eac75280ba60e26d3f24e34. 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/ESAAI0206264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee6016750cc75276d45944f41ee657dda282b45a3094c460a2397255143cdd3. Chain 2 (Bitcoin): anchored in block 957625 (2026-07-11T23:15:09Z), 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/ESAAI0206265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d0ddc8d318e2d5847e61a6dbbe49764d62abe41e4a37fde24e64358a68cdaa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:40:57Z), 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/ESAAI0206266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb294d39d89c7c0a6a2a428a85ecdcf34b6a2199585eb22bae761cca937b8e76e. 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/ESAAI0206267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4d953f3afa0ddf6d05d157f3b1d85afc0dc2a84c6aea05ef3f00ecdf9029fc. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/ES5352305816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216774e8451ca48ddaeddbcf44cac981b1f5406647d6bda69c0afc78633e3dbb. 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/ES5352305818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5f20c47ecdae1c2d39a56bbe71f1dfde70e64db969f6e35e44b5d9c9468673. 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/ES5352305823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e944352a00550478ac9d6c5bcdfc9d5818a09fa42067b894053f679f09e52a4. 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/ES5350902721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2716e00135edde77fd75e77bc635134954790821cd11898e3404f9189396d3. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ES5350902722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb61a64a59e9c482da5e0ec3e66b022f9afac08fdfc6e8d2a873429086872fd7. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ES13I1300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec6ded78f30ffacf53b14e51105bea9244f6d88c856935a4921d6634aa25ee5. 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/ES13I1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8645031a1e0b00f34b98eb080093d5e26507d06a5b65b226d8ffc85dfae06c2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ES6671602961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c271717596b95ed6460044f0fa6b5ea44b1b3713be090438a9dece5c5bde6c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ES6671602963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa633cd7440182c032ea802ce4593ef32f92de33950cccf03d597160602d3fe4c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ES6671502117.