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 0x453a23dea2b97cc08ef3433154b0246ca86ba2d4a854b8fe686c994661c4b832. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/feb7315f-b03e-497e-9117-32898b6138ee.json and https://artists.proofprofile.net/proofs/artist/feb7315f-b03e-497e-9117-32898b6138ee.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 0xc418dd0469b8cbe7a60751375881cb8b7a9e7b11bd112110c1942503769ab916. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/BCNQW2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda459368a3a74e74ff4476a6b64167e99bb5a2ad08490e33b35c54b206704263. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:39:33Z), 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/BCNQW2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe47d74c569523cb2aaa9a8551c803c51298f80ec305d598c6a9735a8f3a7099. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/BCNQW2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be0b2729a2efa69f10d2bd4e37952cb589881de16da3952db7bb5cc157b5162. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/BCNQW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc418dd0469b8cbe7a60751375881cb8b7a9e7b11bd112110c1942503769ab916. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BCNQW2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f010903dcaabf4a2a50bd3a0c86af38da9062d4250f6652686dc09a6241b29. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:30:20Z), 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/BCNQW2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1369cb6d43cfeaa658d2407b17aefb0909348a782f4367038f320be1d587a04e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/BCNQW2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a5f563330207133dde5f5a5d0080d7314efde2c2850a2ff45861cd565b8b01. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:35:58Z), 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/BCNQW2400003.