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 0x10d530f96d13d51b0c6521855c374f47f4bb1af6ccf1ed78f1000c71331457cc. 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/cbadf50b-11c9-4231-9801-fb2c034d472f.json and https://artists.proofprofile.net/proofs/artist/cbadf50b-11c9-4231-9801-fb2c034d472f.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 0x0dddde011cdd7e752b16637b183f4b4789d3d65c85664e0bed3390803b621214. 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/FR59R1565657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16c31741f9a505c79a1f6d81186883403df94c1e4fee0bee77f34ab895a213f. 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/FR59R1565656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c145cb83f515d8bfda1423d39a6fe028e1c339d44f9d1b7c379b11b14baacb. 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/FR59R1574134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dddcccc8a015276a95d23522ca33f6464cabe9cd41e5a60ddd3b7585107aa16. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:55:49Z), 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/FR59R1574142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e292b990b5f7f044f77999f8afc2aeb197e8821e371b819bf246d331191566. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/FR59R1574143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98acd2510f2e1bffd6e22418eec4f3a4b00c0a30551022d5b6b64d30c7437f7d. 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/FR59R1574141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cdffb552ec6218b54361700e76de202c85baec2d0238d920c73134c66a6f1f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:18:45Z), 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/FR59R1565655.