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 0x3872259641b79cc666bba736ec5862cd2d2269d6d19236aa168452061bbaba66. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/819ea65a-8479-421b-b707-ccebfc3d619c.json and https://artists.proofprofile.net/proofs/artist/819ea65a-8479-421b-b707-ccebfc3d619c.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 0x50b7574ae32adf0fc19777fcca45cfd31ba4c1ada565acfe318d2037075f865f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTB42584258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf189733aaa9c1d3295336c0412077e78a93d8b5b8f917e149a888f44717a79. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:23Z), 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/QZTB42584259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1489b248cb568217b79855f27acaf8bd542cf9ed3b35a3a7ffa22e34c489cba6. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:27:26Z), 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/QZTB42584260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe075f51e948d1bc6f3d59a309f078314690800c2cd30e93aebfcc2cd916a65ea. 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/QZTB42584261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cac01b32565d01f69d489f8197036d88a461d90d8958563701c4f318feb1022. 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/QZTB42584262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2deba023a34fa3b49617efaad1d7eee99081802bf705c0ee16498dc452254386. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB42584263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4ec17bafcfb901d5df3eb6e174e887eff36955cf797bf67ced3644059e5d6c. 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/QZTB42584264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b673d40350351ea8369bc74d668a6508ebebecfe5ce2e4ef9b69e458323b10. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZTB42584265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41d14395c1650d8ab9b1970b2217c437d0573e04e6013608d5246a11ae4b027. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:46Z), 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/QZTB42584266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde9505f8f529c1284de038e9b5553cb895e5be2441b8310a1e89c18a766eef7. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:32:48Z), 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/QZTB42584267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1539d9335caa93d85892f402c7ed3b408a4f3f87b3d6f4a1af2054e49bdce375. 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/QZZ7S2519791.