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 0x8afe664d6d3544aede6208cd5111885e92d031c0c52264b1ead67dc2379248e3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/867727d7-2478-4ca5-bb53-d4332c28e446.json and https://artists.proofprofile.net/proofs/artist/867727d7-2478-4ca5-bb53-d4332c28e446.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 0x5aed1da1d72b91a5d279f76743cc4b0d8b7c0a121f04f71ef5e150488827dabb. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZGLM2352470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd10bec0c785f16e9f9aebb6177f0c2072fb13f0ca0bdadba684fa7255706ea. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZNJW2314342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136bd4e11559be9d4303f61e61c236120ce8cd410b80ab32ed66ed0bf06315e9. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNJZ2326914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdca1b8d611b080c5b76cc236befdaf744bb7d4cf574e293d917ab998d1186e. 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/QZGLM2443344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ccd14cd1782811b2d706f3df1b75081e34e09c58b93229b1e5ee7993b2ec2ff. 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/QZNJW2492231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf793a1e309b5735da1ea9efbd5476ef1ddb656a890527d6ae9054321a12aa3a9. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZW9K2410417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c025d97fa97855bd94293ef352b00dfe0dacbad2b58c8831003a2e7b05253e3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:37:00Z), 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/QZMZ92592204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf793a1e309b5735da1ea9efbd5476ef1ddb656a890527d6ae9054321a12aa3a9. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:42:52Z), 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/QZW9K2410417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7d65e8bf3bdda961f4a2e26f09681bd444fac6d2ce8409d4f4e089bb40a3ea. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:55:22Z), 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/QZTVM2598871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d9a951286ff5691e10083bc064574d2d6eb294e4cd638e307f1e079f15c490. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZTVM2598873.