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 0xfc340ab35d884ef142f08144c070bdfcc40732e83477eee95e15b3ff00654452. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7c18135-afe0-40bd-aa2c-6c19291e809a.json and https://artists.proofprofile.net/proofs/artist/d7c18135-afe0-40bd-aa2c-6c19291e809a.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 0x4051ec4a420bbac93575e576c31f7adb6270107a6865a3bf7a010bfe826558d0. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:38:49Z), 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/FR10S1619406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741f966be288149b9296e6b0e31400a7e1ed4067e44fb863dd568ca5018bd167. 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/FR10S1619407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4585eb4e20491eb3172ae0a58949764f0b96bb17599d151cdb462906e36638. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:34:53Z), 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/FR10S1619408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4bcf12eb7e9c82ec1dc04190024a53601292fbb301c8d0168e7e041a700816. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/FR10S1619411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74858a93876c36d977d31d13923183e1e56ff3c7195cb3cebfc713d8de149353. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZK6J2088239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cac91360a94ac7cf77e3072e769af3422f6d17fb8902da4e53ec1ac683c46b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:50:38Z), 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/QZK6J2088240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dd097eadda43b50326bddad4c7f713e3d481e6c7b7a470923984945ef6814e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN62276294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028fe964edca5cd13390c308f04ecd133bd32ae1ec1ccac16b03e0c5fade36ff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CLKT22002996.