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 0xb35282301aa9e6d7c15c11a92d2c5f35c7450d85d1d60494e76b2ce689d2630b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23c72c97-16ed-49fe-9bb3-5bae057484ab.json and https://artists.proofprofile.net/proofs/artist/23c72c97-16ed-49fe-9bb3-5bae057484ab.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 0x05b020ed95f4f3a7117410a23101df7e2bfdf51b6b8763ba24026fa3383cc85b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:31Z), 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/TCAFG2078722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad5f786b6225086f5582553a903ad81bd0b9a4b8d2d24dcfbd36078a1a6b598. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:45:58Z), 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/TCAHR2390789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c74465299b15d345ceb5ab5555194102988ac5b37ef995c4001434bc841fd0f. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAIJ2410067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779a9f1d4ef35d013ee2be9168a90bf95a42ecb28896be2e51d391a135c4d12d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAIJ2410095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec6a1f8299ae4eadc7a0945acb0b024d94b3fcd930df02fcacf2f2e2f422442. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/TCAIJ2410184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62fd01891157435c1a23addd76a4ef182142465fec77f49a0e656e9c84c82d8. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:28:41Z), 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/TCAIT2494501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d3abd07c321ef8a45625408712e94afa0771cfd73f95964fbe06446798fc55. 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/TCAJQ2518755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30c6b2e7ca4d02da8673c8c3c38c7c675ffb67729cdeccc3d63ee58383d07fb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX762125241.