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 0x87b1487d7313ef0396f5ad5b6a252c825072abaa3b02e0784b4fede3cdb7901a. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c21cc95-cb3e-4fb4-ba00-2f24e1b8368c.json and https://artists.proofprofile.net/proofs/artist/8c21cc95-cb3e-4fb4-ba00-2f24e1b8368c.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 0x65bcadbdf7078c2b1f4f81297ddbf45c5af4db1f65a98a32ed3e15651e245566. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:08:12Z), 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/FR96X2231115.
Best of Monique Séka (La reine de l'afro-zouk)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b8b414a9ff467c66560d334768446924496e83c3f209c067b2da42e7aeae9a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR9W10101341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8e14eca20ca4c2ae9ff18ee28aa2c4c06e54cf91a63801e44f0640e01e4ba3. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:10:11Z), 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/FR9W19700693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc55ed62b557d77ebc2187c2428071a681a0011376dc81f3ae682b1a0d7cb3fc7. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/FR9W19500616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47842bd44aa4783d01da264207dfc02ea3ad7ad7dfe39351222b9e615019a55e. 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/FR9W19500617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeba36264c3a98f66c0b69936cae7e4786b7a0f477fddd0a873dfc023fc3c850. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:15:19Z), 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/FR9W19500618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa35f8add3a8807558a66078d6c2a844cf076367298909652b467b753fe58c60. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:31:42Z), 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/FR9W19500619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581e7e1f606a9827e61fb4d6715d66151eedcb89af0ce809bc1b8ade6a941e45. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:23:50Z), 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/FR9W19500620.