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 0x39913999db8be75d611e2b304c01f247eddde0163d3b443b97fb709e1748019b. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e598e156-3d39-424e-8869-a870ed06a275.json and https://artists.proofprofile.net/proofs/artist/e598e156-3d39-424e-8869-a870ed06a275.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 0x7ab2adfbdff7db5e08588ba9b6e3af06849336b0e4d629fc6a05aa79657de080. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ESA011617546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dde4180f9ba4655281a9749dddeec1b9a91c2b654775121d3da65e3dcfe5bb. 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/ESA011617547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff24b6412f61918f642ffaa3eaf695a170b22359847bd532e2046513de5c96ea. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:51:01Z), 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/ESA011617550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bff1662740575f256185668416ac2ab8d1691d92580e99e7bbe9aa1af74dcf4. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ESA011617553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f66caf1a57642f5c8d27d2cb911589fd98222ead8c9e66a5630e61da64ed1a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:19:40Z), 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/ESA011617561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280dbec543bf3fc14650b2d367a6aec6f784e399b73d17a6467c7ac261b4ef79. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ESA011913428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b959f3e612a7606d93aecf7c81a5cbecca23659236b0cad744d915f38586ec. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ESA011913432.