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 0x6f69bb68aacbcd3d97f42771d0a5e958638112b05ac86f2129026119c07c8c7c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/901332ea-faf0-4431-834a-60f41056eb2c.json and https://artists.proofprofile.net/proofs/artist/901332ea-faf0-4431-834a-60f41056eb2c.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 0x5ee29e0c1400f5d500c501ef2133b939a4da629b4c05043af7e1220b74e342ca. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:40Z), 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/USCGH1859328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99bf62aacc9eb848bd18680f9b61d484ca84c47868d60190a24a7f83cb20917. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USHM91805960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc58dea8d5b3fe801a3ee45f2b646ab55d3e5ff23d7c41b38a3ed0bbad1e856. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USA2P2008232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae7f4d63501f09a3b13de0d281e784d07b6e32b283b13be7a8615077932ed1a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:02:32Z), 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/USL4R2114527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4147c5fcd46962b05b0a95ff153fbf192c22ab183196701fe0625da26cdd5894. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:25Z), 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/USHM82217790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e933412903197294ce5df469b8ccfde1a6cbacf85c14b4800576afe2a28d6a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:51:20Z), 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/USHM22388226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cdba9825fdb02d6e524b307bdf1a028f45e67fd07693d1a3d66ddb3836536d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USCGH2401241.