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 0xf450708112a8f7245dafcf8a758fdf2115daa0d3cd825c9e778cf56a37c77fe8. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a463732-9947-479c-a0c2-d790af8ccf32.json and https://artists.proofprofile.net/proofs/artist/2a463732-9947-479c-a0c2-d790af8ccf32.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 0x5dfe530800f7a7a1cf0986ff706fbb0673ec34e1046553d5bafed912abb3f9f2. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:17:00Z), 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/USDY41760175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b97e8dcc3715843c07ed57bf4d6663b556544a70235739b1fc83f0f7b7b49. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USDY41760159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8682851c74650cdedb42f26c4488f3de1784d8eb7df54a91c905a7a7959a41. 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/USDY41760161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7dc99339f1b2619f0b4e227af8141ab93c53d457ef1bfb00d90a25077939f5. 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/USDY41760178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3fc11d3e7095b59e31f899c4f382cb8dbafeb0a94d73d760380ad449b9bd2d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USDY41760180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912a95afced7d8f39696a18e1f81573e5fcc3aa955b9b39952f186e258086d07. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:19:32Z), 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/USDY41760165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f29406ba5fac849283c868f5e272df9973e5c102c9f914557c08a8901799a4c. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USDY41760181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ddb4ed19df670ce059da103684943c53549f3c05b6fe9ac5dfa698ff48a377. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/USDY41760187.