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 0x3c7db68f47738ad3a4e094e33a5e9393a7f189690168f6d11b039ffdc8cd5c16. 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/fca68446-9391-4f90-bea9-68918564bab4.json and https://artists.proofprofile.net/proofs/artist/fca68446-9391-4f90-bea9-68918564bab4.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 0xa7a69e0f6198a6ff7f4e9e1ada5b58ee51e9d32c000fa8e63446fc65634e6816. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:18:17Z), 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/TCACL1628749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76244a32d679453fc41f844b1ce16b5b6ddb14fe0eb7f8af6a28b3de87df3a79. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:59:42Z), 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/USR3B1300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc40588d26d7e9945751db938a1b6cf00954d72024160102290b48336c6ffdd7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCACQ1696881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e933412ec01a4b68dab5d36ccaf71b988dca5b9ded95ef0f062f962b1f6432. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:45:28Z), 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/TCACQ1696884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf5dda3ada71976f56e36627210556ffff5009d90012a4b192656c29ca45834. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:53:19Z), 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/TCACQ1696889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3db7bc9bb12949e9deceab4d1315873cb696078c627c2b876953acc8be5dea. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USKO12000556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d867ec3e2d738b797a58a959ac7632631102229d48f5e02a7692da22f38c390. 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/TCAGI2234105.