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 0xd5caa2888f5e87ad7566079291f3887655161f978abf9ec4307632c1e6173053. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c2092b8-4177-4abb-9ffb-2c5a35dcf7f2.json and https://artists.proofprofile.net/proofs/artist/8c2092b8-4177-4abb-9ffb-2c5a35dcf7f2.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 0x6df7e59256c7ab2fd3dcb3744ec35de1fab572413fb86d284eec1cd6f9222a50. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAU2346636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146c9e089db4eb2bbf577b802b79af60c83935ae3726dcf52b48473db4cce99c. 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/QZK6N2490503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a86e1de3026940d4d10ef428c58afed484a7521f73298ce7da8e3d2d52a449. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWFV2407783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273fe6135882e187b3d3d951ca30bf8b63536905cd3983e7ecded19c57e94fe5. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:56:52Z), 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/QZFZ32593632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a17538a95c0cead7b98fa02a32e89a7eeb1a37359b099845c76920c832b47d. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZHN52530185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d9d3520817eb737926e5def99d5fbb5c5fa829038bac5af93ee5b161c5610e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZHNC2537424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a17538a95c0cead7b98fa02a32e89a7eeb1a37359b099845c76920c832b47d. 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/QZHN52530185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7756bacde4caf783964f9da670fb4489a96fd364a34311826511216b51785bd8. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:07:30Z), 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/QZHNC2537426.