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 0x1addf84b47f7b52f3d606362629949912ff39cb3e17046a1a2317ce299c427be. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5772b66b-adcd-4721-8cf6-3e2665b3aa83.json and https://artists.proofprofile.net/proofs/artist/5772b66b-adcd-4721-8cf6-3e2665b3aa83.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 0xd98778dea6c48c07c1d897092b4d32d2f1941f60b15f926f48dc22aa9ff65dc1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH0639443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6756cb4b891aa476e46f0cb16dc15d449382020ea6d393b6efd649cfabf75c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:43:42Z), 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/USCGH0639452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdebbd3638fc073f6ad6946c9f4bd3ff31b84d6e9d499a587d22d25205ca8a9. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USCGH0639453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47e42fbef1aee4a47b7f4cf9fec3916daa1bd2a7aaf09a8980d0e392168b6cd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGJ0895602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf58497c606f1de4bfb5e8643d2f751c5521158a22f131027c6279e6420fa429. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USCGH1468697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6526fc22256c4324b2049e8f39a57db5124541136e995f9aa5ab211cb782314e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USL4Q1965169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69680c81faede05cf484cdae14339261ad2e81d9f31e8d055da4ec68c3d1542e. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:05:16Z), 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/USL4Q1965174.