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 0xc96ede8cc84099fb91d6e2522cde8184124c934151c3ae4d15ce2ca8ee6b4673. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/986fc9cf-5341-45dd-ac50-5daafac4f331.json and https://artists.proofprofile.net/proofs/artist/986fc9cf-5341-45dd-ac50-5daafac4f331.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 0x646259a40117d351f635e8206fcf16873723f076aec25ec61758ed34eeb04fe1. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:59:01Z), 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/USX9P2001282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b0067046356ed1b97f210ffdbdfde8a05d194b5d2d8e63af9f407c2dd3ec34. 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/USCGH2575546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d9e63b4a8e67df4c8312ca382c6dab246d8b546a92508b5c1a666d9afc92ea. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USCGJ2551924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f6f25fa33dece7e96b637455c9ddffb097ae640e2622af829e32f028a85be2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:38:58Z), 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/USCGJ2551925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2699f612a8ccb9056934f935a6a661e9dab75200085ff7485085f6a96bc17db0. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/USCGJ2551926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052573f0a6793f766ad04a15a280e54ecab9d07ec026e8b23d3cd7701a0fe674. 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/USCGJ2551927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1129b9365729aef36c3ac92c43839ef578cafcf73f3d007076a11d72940159de. 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/USCGJ2551932.