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 0x91eef7c7eb623bd72570cd5f8e0779b2e3d9ac45aebb683a50a321437ffdfb3e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fd187f9-8761-4f88-97c0-99867bd67199.json and https://artists.proofprofile.net/proofs/artist/6fd187f9-8761-4f88-97c0-99867bd67199.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 0x60a28fefaa1e1232101fee4ef62cb853f89d4e9c1cebb3929c1688bb23d61a57. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:24:09Z), 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/TCAGC2207519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdacb89d5528eae0f22e0e9418fd76ffd90948c756f7e94fde0469b7d5f9073f6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWS2211116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa766d87819fc919eaa6b61e47d67971d22054d49271613c855cc088b432b0e09. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZPLS2253206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa6342fa496d01076682070a1905e90faf37771961d3fac3a773723d8bdc0c5a. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZFZ72319085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12d5b489e2bb39c66055f7512c3a30710d2f6afaaefade2e58114bb2e25ee50. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN32382529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99548b11433d9b71c2b064c31f2f212d0f532b8a770ad820c4f00f7c03746daa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHN2332441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983d0a92ef197fdb7e4b35b668eb1367d5657a3a965ebeff989fb0cb9a1a20a5. 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/QZWFJ2381675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc01b13536172304a304272771e401ba744d6621923ca5de17a6c25024084b19. 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/TCAIC2499352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24c76a19a0d717454bd387c2d6ef02ebfa3417b16359ae5cad211bb5708edec. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCAII2441954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97cc6c4889ef10abda964c7ebe9f667159d86101ea9d124b5a8d96fd9aba9e6. 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/QZWFU2491982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1791227a9aaf52cb1aad6e31733a1c395bbdd0e3f9f798bdb6f1b2b6680f06a3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:46:56Z), 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/QT3F42421434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bb0446da166d62e2d2f7c54d1e5df8b4157854173c029f7c9224486a8b29ef. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR9W12541267.