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 0xdd5fb7ac4b44b6702bb4b393d20b1646e0706e7c5e2b10800c9ddd6d065baa23. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7936996-cb57-4035-9a7d-8d572da6a64e.json and https://artists.proofprofile.net/proofs/artist/f7936996-cb57-4035-9a7d-8d572da6a64e.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 0xe293a0f88d46e6419c5df5d274b2cd5f6ea610f2a1885a10aedfc7f065ebaf6d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMEQ2588169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db3f10c3616b561810c800a29058da7dcdcbbc0fdd8a3565b500896d99f3136. 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/QZMEQ2588172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1da07060a34b5adf63fdb502de5cd0fdd93199f9026b04d8789b0c7c3763332. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZMEQ2588173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08eff39be4caa3b3f51dfbcee07a39d1c5b5ca0e8e0bcc2e16d8226707766ea4. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZMEQ2588174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce69f35100cb0d1f5d4468165fea86beefdd0549bb7d7e5865e42bc06389b96. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZMEQ2588175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9298bc83f7c7fafb57efede9998f82433ddc98022036ec3f31e04af29756e22. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZMEQ2588176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97881c9520ef22f3effed062d00a48f5cf60526a279a5322ad2ec749396648de. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZMEQ2588177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bcb483037f3cce78ae18fad4e6316a28614d89a4cb77eef6d2fec890c8538f. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:06:01Z), 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/QZMEQ2588178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086e2a83e353ded25fab6698e73a46b1b81a7e3a673358e56caf76a4b345b998. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:23:10Z), 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/QZMEQ2588179.