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 0xdbdd5f3a1b452315db44c4cc58cadc061f6a19c9e010dddc95d573816bf113e5. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6efc89cd-74b3-4e95-9b41-b6679962d47a.json and https://artists.proofprofile.net/proofs/artist/6efc89cd-74b3-4e95-9b41-b6679962d47a.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 0xfccb0cb33bab5a3392a06826ca27378db4c02b52aeff778adee94928a4cc26c1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZMHM2206439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c068dc911252b7b16c69366c89ec73152917aac3a80f10ffa734db83504b16. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZMHN2255138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534b5d9133f63a9dfa8ef8cc39b546e856c45e35b2193764fb5217f2d1c12905. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZS642203402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534b5d9133f63a9dfa8ef8cc39b546e856c45e35b2193764fb5217f2d1c12905. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZS642203402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5556ffdcbc6eb6b2dde29f864e96ac4ccc651e1002e7f504070f325086373d. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/QZS642366097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5556ffdcbc6eb6b2dde29f864e96ac4ccc651e1002e7f504070f325086373d. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:09:53Z), 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/QZS642366097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a9e7de6d929e16529454e798f7d1b175e5548f2480e57cf358b0c63d6f148d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:46:35Z), 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/QZS652319802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f71871c0578594d24f39614929feeaf6f91b3d60d49d4cb77a9330bc9d6d54c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZS642379834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110e42675b5ba2ee6e48588b16ef20132f84a4620f3c943c1cca7e270b727091. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZS642310115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bdedf04661d2e9118e0d12d3f41359e5979c142d7bcee09436c187fa480df3. 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/QZMHL2314629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110e42675b5ba2ee6e48588b16ef20132f84a4620f3c943c1cca7e270b727091. 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/QZS642310115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06ce51c919a324645525356fc2b9792ab8764299e7633b3f5a9ec617ab0737a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMHM2215152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b804fdb8c0c673ae09b5ed0893b91e0117e3ce4192acaf119edf7822b3902b0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZRP42255300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a4f204c9f4ae50650c81f3df81a6097117a1f3a398414b2f2cd3ba336e5820. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB22289036.