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 0xf58e520b2d0aa3b2874270bb9203cea4c67232705332d5740ec3101e606a340d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e388df2e-20b0-4842-b81d-4a9a9f05da06.json and https://artists.proofprofile.net/proofs/artist/e388df2e-20b0-4842-b81d-4a9a9f05da06.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 0xa59b974a5584967fb30b9f1dc43e7569382cbb06f6c6b85b7a8767c784333cd9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAJC2486540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47180f13e81604a0255216a4653440aac54e44a24c3ad21d9a8d26e117626e81. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:44:06Z), 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/TCAJE2582693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b85277b91a012a7d44615c2fca51dd3a83bb3ab641532d7ba212acd9a706b2. 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/TCAJF2501876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5034465a3f4a590633ca64ebc22bdce6c513cda3b6d3f460b35e8718ee3566d7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAJF2501890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9bb34b46e0e74d49e97971147335a9aaf9efec011b9eeb1bcb9a01941a1392. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAJF2501820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a31bc3c108cab286fa49872a8648d9835c6256cab117a31a3614297d054b9c9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJJ2502962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0195a26b7adad97fb673dc8afad9de283a9ed665232cf83d201b77645ab42f6. 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/TCAJJ2503916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0084153096fc159d6c57e2a5eaf7a4bb36718de69e318c41e5a25fdab98a913. 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/TCAJJ2502902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0baa94bea73611c5d4de01bb0641e6cbe95a1e889a70436104a1946b5b5a24. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/TCAJJ2502981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565418ae423796dd1687f4511e2a8363f33518822e10ca87944ad3f6e9f06b8a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJJ2502936.