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 0xfa74593afd5555c8ad89bd7eab1db88ab87daff0690c01201d054b0fbcb2047a. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b59604ce-8eaa-47f6-b03e-7853f3f7a467.json and https://artists.proofprofile.net/proofs/artist/b59604ce-8eaa-47f6-b03e-7853f3f7a467.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 0x2a87f33db708c568b660b988f3cf5ee9d7f59f724837565acb613f8b63a56649. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:26:30Z), 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/CH6541768259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99ce62b4e3e2db9d578019a2f54e5f30a9161591467bdb128a3649d617c945d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH6541768262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d7407746b5a4c9659aa1777e3915f2ad2a300a00b14be01c7050ae3b32741b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CH6541768264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be484c839fe3bae5104491791bfb8cee18ffed14e0f7480f643cfbafda446d3. 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/CH6541768271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78165a5fae29b6402b1aaac0374c4688638863c20fd453d1586295523d99f0fd. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:24:42Z), 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/CH6541768238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900b3a2fc0303bc101c3c98efe52a895a83334cb55d352b0dfeaa9e76b4b013c. 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/CH6541768246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8564d78030374265b0db36a64c7b9fd222a052870b239ef673196b59144aa87. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/CH6541768254.
O Tahiti E in Japan, Vol. 1 (Live in Yokohama, September 2019)