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 0x1da5aeb8e24a7ef4c48f68eb5bd34d408c22ce131ee4d8123378695eb8cf3297. 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/217bcfd4-976e-4a38-a20b-e780ffa44954.json and https://artists.proofprofile.net/proofs/artist/217bcfd4-976e-4a38-a20b-e780ffa44954.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 0xd056ec1d6b7a2f0c4fbe9aa22a7585ea2aabc8f45768aba487d1fa8888f2864b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ2318894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549485630b0ad3ab9a7ed30a7ccafdd11e6af1e385f4404cdec5282d184daafe. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USMH92304229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4ffd8c20d25a836a31e947bb7aa0f3356ebf81c1692926b1a4d46a4fa5217e. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:06:05Z), 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/USX9P2322949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377736a530a2a3ef2410855b78874e5cf9b246af30b0a7e8c558464de8e5930c. 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/USCGH2471274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e54bf5c54efd2ac17bb20ea3be4d8403b5ac3fdfb0663c732d0abf99660b19. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGJ2413008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78991322f2e948f24f30ed5bd82fde1e98809a481a8fbb99bd95b0575ed93c0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM92446921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57d7e67a5389b882d5c014485bd7ac49e3dc3efe82c84b2643c6e7abfebb028. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:39:12Z), 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/USHM92552536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9aff77fec37fb19e74cea202f7bc0434822d7378d8421faf2392503815ae01. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USX9P2535841.