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 0x8288a69b0cee6b12ac8f0d238fb635a330e992aba31b8ed3b474e0bcfcab44cd. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbfc39aa-1770-491a-975e-57f90ae34018.json and https://artists.proofprofile.net/proofs/artist/cbfc39aa-1770-491a-975e-57f90ae34018.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 0x4c3cbb701b5fe827ef501183582d5e9916db5b934e185effcf1405e43fab08ee. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CZI121220209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16d953b7358fa4976f4ba22706d9a0e4dea33bfee3f23ee83a3cd598b144a36. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CZI121330508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16905757021b9a698387486409c93ec5c70549b9fb9b95ec0c311e5de5f8a3f9. 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/CZI121501501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16614a82221621102b5acf8bdba02a062404e9e4d30dd5858c414d87ea9de19e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:45:50Z), 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/CZI121501505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc74ed4441bccd94fceb7b029e156f3cb59c60c012c66eb237855b726c81868. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:59:17Z), 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/CZI121501508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2369612b03dcaa5c14d070e01e5bcc478019fd65657b4aaed1bcc24d01dbc13. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:39:39Z), 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/CZI121501509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45450ed187404dafaa861251a88380751c0832bd1fe1fb6ac51b786447ea0d67. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T16:04:06Z), 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/CZAC22101501.