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 0x2cf30ac77b7cc026fb1a3f3c37d944ce493abc414cd3124891de98d24d3f84d8. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2775301-2516-4244-bfa0-c5c10a317216.json and https://artists.proofprofile.net/proofs/artist/f2775301-2516-4244-bfa0-c5c10a317216.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 0x9d4d7d14c1e8a9927b9cbe7df0d03664885b5aa25304f8ca82fdb599c78f30f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZYYZ2400247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd4f11735347a25f32c8ea63976d45e1038d2f55c1390894f6a1afb57ed5786. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZYYZ2400518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b148abb7fb3a12cdf0e06fd0da1520f47c455edf5dba123dfb0d683cec3360. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZYYZ2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17af1f22a81f8cf6860fa8875f8840974b9b98f1c238d64b5afa41b25336681. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZYYZ2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8dc9a47fa419e9d3bbe94837a8c6e2b2fc7bd23ca27008c5736e1ea3bf0a09. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZYYZ2400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb866517683827fc31ab8fb04c11db06fe2e201f28e977d6722027ca1eaed16. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZYYZ2400085.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fab67d3d6080db5873319e77b5e5657f6e4bba5a3fdae1dbe11c3cae1f1e039. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZYYZ2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1ba2e3e3d7a0b6ba0a6b4d0a0253e5ed4735e743e431b21381e3ec65f96ff7. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZYYZ2400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2478a513ed02ab0eec75f440e36b44a0a74114ee69ffe8a0eb3ee3be910780. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZYYZ2400091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fbfa66b76ace4239b3790e9e5a35d32d5503acf859143fd67b774d564462ae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZYYZ2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92242ed0a64a1c3c82778775956d35014a7ef1513302403a79691e67fafb4a77. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZYYZ2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc0af0556adeac66de44d54632fa439c4485de6bd88f09b005414e51805f151. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZYYZ2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdf99a2cba445ddf9f66c5821e5702b149051d018562a112b6dec07f4879b72. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZYYZ2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40b0ccf2204011658a8ba613665237d82e1b80418622cf41cc4dbcbf6b188d4. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZYYZ2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbd5dd688dfc5b4c1b96fa3ab7bf5cc96732a60ee3796a9a251a4ccf9f55aed. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZYYZ2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ccf22fb19e9ec77bfd2243533006f49294e86179a2347b7941b6b9effe21d6. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZYYZ2400033.