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 0x5865b5cfdf0b4ace6398272697c26f408b44467a111f46d3cfb29833a478beef. 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/3622fa30-ce61-4c6f-9297-baecd3809c3c.json and https://artists.proofprofile.net/proofs/artist/3622fa30-ce61-4c6f-9297-baecd3809c3c.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 0x9ea09b90c86444dc8dc3e88ce5643f5f6edebe320b86aace777c61ca928218f1. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:02:48Z), 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/USTCC1074808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c404a328847e8f95ea12755f00c78e76ad1387cd0df09993731b70c0799df7. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:38:46Z), 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/USTCC1074809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e5681262a712e3135ad6bb239862a5be744e08565725560beefa48eb6a191f. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USHM80340793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b99fb5c498c32db63ec6984dbfdeff5fd12df19b28adfb0fe15eeb0c07268c6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM80340799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b9ce1032f063b0df297ac1d66de72a162c359438bbb68e1a5b10ff706051db. 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/USTCB0995433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7eef7a44e82831bede85cb4c33bb8dbbcae2c067b41f48f5f927555115e18f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:28:01Z), 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/USTCB0995435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75671cbbf9d7eea0bde8e97fbfdfca7c60b5da1dd1cea51c74944d4e30d550d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USTCB0995444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3246650b90af0f0a10481dc529a6d7d6e9c9ef711a98981aad771f17506fe164. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USTCB0995459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ef9bbd20348076bd518369c5394c33ed40275197354968669d1e9afdd1607b. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCAEG1938308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f49ec5f67d527b2d861817ccc3a63eb9ecb4cd25ed780c6b43a067a00cfa487. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:14:36Z), 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/TCAEG1938352.