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 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 0x87befeb7a3e003413eedc68bc6bb5ea2abdb3c7a5e08f9e4a9bc0b9fc3801262. 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/8e7a8ac2-9bf8-445e-8d8e-08bd65e4ade7.json and https://artists.proofprofile.net/proofs/artist/8e7a8ac2-9bf8-445e-8d8e-08bd65e4ade7.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 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 0xa33964523cec7de249a2f885a3a88d0b5e12a32fcf808c8816bb24f2705e1d8b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEQ120706656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf9fbd7ce6f884cb3e906fa8414e3f0af7082b107f546a2f848ba72beb60393. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/DEQ120706657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf868d40909573ab38e3e7d29a7b33a8c2b28d11eb85047e9f9ac9997f2677b3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ120706659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0023a968e0bdddc676ae311a8c2d3d9a5a620e89a59b149a8599987e5fb3a2c5. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/DEQ120706663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d54a63da1d2373cd736a3ee42e9a9d2db4b7376ada39bbb7692a44928c4564d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEQ120706667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bfb3885125ce9a79b651e31492e414ad25f913ff42d9b966e1f4e3dc3edfda. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DEQ120706655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864987265900b97a85988ea46f0b4387f33cd16d8c6fc6757d8096dd3db5e5f6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DECM11018005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547fa8182c6eac9666e5c35b83f4a8b1ad76e6b90659ce1f37681784b0d08968. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/DECM12539502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9af33ccc47a047c8a05bb6b3114d8b87de9b8c91a996f9cef221b2fe67ab73. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/DECM12539503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907745d5bf7ba6d92171b8a460add743cd57b0de0b75aee2f89259634f31b343. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DECM12539504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a5a5feb3272f0d537810aa5df9eb2cbb31d193311139b1abf90b2a616369b9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DECM12539505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1a4aeba6a38c92b7ef81c3f07f5c0ea599e7f68cfb12d3dcb04c2f273b198e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEQ120706665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26853c30fffb350b2e0d5090f7c362433764426a77e7db41e55b1a4b99f30953. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/DECM12539506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad947f5eeef48ff54835067c8291e57521759560185378eabd5f774f92fc457. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DECM12539508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10fa8ef5530ccaf48a3a3439a30da248d3f838b257ed713c10c781849a043b4. 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/DECM12539509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eafb6234904c28fc15c33228e57ac018f06b006795f88aefb5e37da14163f0. 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/DECM11524917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608ebef542371454d809257843b37b49d56b197ced916e44b99824a3f0028491. 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/DEQ120806831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebfdae1404554fb0b590e090a3146b9771ed53fed2e157bb36b7ff245abb072. 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/QMDA72475957.