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 0x9ad9e8f3d668c130a47396d959eea5c64ed84503ef9525f84366d86ea8d6084d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b4543dc-fadb-48ec-a117-f8c26ccd0317.json and https://artists.proofprofile.net/proofs/artist/5b4543dc-fadb-48ec-a117-f8c26ccd0317.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 0x2e900aa9dd585ac37d2af592fa88fa91f42b6062f0cea930ac6a40c2d7082a28. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAIZ2463039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722169f12023a6cdba1a75a67f4deaa087db42b338d134c6458d3f3b1044ee2a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAIZ2464089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73235f34f88408c71544ca1368665f349286087b5de24cd2aa43d9aa337a62b. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/TCAJC2440344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fd43faad809da4b42b315065f238262ee669ee5a32fad52c50490a5aad52fa. 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/TCAJE2455208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bbd9f4ef0631c83b184e069fe9254ff647c160b9d631480650aefecdcbaf9b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAJE2592982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7711442e71331709963a271986ca18e9e805e0645f49902791a4ef808bc58faa. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAJF2529682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d991edb20b78e4452e86fe42eafbecc7662a296633f1989e66bf8183b8347a0. 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/TCAJF2585371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1548467c033b325127c1938b82a26c260360841cc01b6aebe8881781b8e1e036. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR2X42505429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a0e4d91863c7ad5826ced9314eb44631e1a4ebc47df76bce8b46d19004a77b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRX202511346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956388d39b9c6e3492d28fbd5df300aa59503e5f384082d6b3de4dafcfe549ad. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:33:30Z), 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/FRX202517632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a46a66744f0acfc48d43f9b661f93edcdabb75a44a75ef6d2cbe7f12b2df53. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWDW2517560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fdafb3bffb42897144e63617c8f77bf5370dfc31ac8c5d20709fb1cfc3e5654. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:27:52Z), 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/FRX452510055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7ffcda952dde85242ba3fef6a053f6df1c87b2633d312ab3a01fb58ac8908b. 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/FRX762579554.