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 0x09651e45389278f4f4f52abc3cdeee3ceda8cefa79b2138a423a902d77b97581. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/956e3594-31c0-4c16-b5a4-140aeb9c2762.json and https://artists.proofprofile.net/proofs/artist/956e3594-31c0-4c16-b5a4-140aeb9c2762.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 0x0e3e5d26bb85b6fcc1f17a622fbebd59ea916445902b59ac0e6efdd9e3c68c21. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:51Z), 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/QZTAS2411095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1c2fbc98827bcab24aaadf5f44f912de76626cdabc56b53ca1197e444b176b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX3HH2203281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f17c367f17bbf3ecd9bf182ca61f12acf1570e247fee9871e5aea3850ef9a07. 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/GX38U2305038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dba53b62cad9c1dc1f9a6ab40d3db83d423bec3dc7a62c34ed35487de3198f8. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:26:44Z), 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/GX38U2305169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f5fef5186c1a46acfea9a0163d05b552fadc270d3d33cf6c831fcd2ad11cfe. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZHN72436292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38889aa1c5c6f7eb3f337db5a50a3b66f57b5f0e66a741f6d52e234bc64c01d. 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/QZK6J2587685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14c69d7902a3b530f9d589c9aa33acd003b367dfbd22c6c460608b3938c93f9. 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/QZK6J2589840.