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 0x98df8131395569ca9e26bd526ddc40d9bd2b1ac61c09a0523fa1bd9137032092. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70b7b6cb-eaf8-493d-94f1-c75bdcb06ab2.json and https://artists.proofprofile.net/proofs/artist/70b7b6cb-eaf8-493d-94f1-c75bdcb06ab2.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 0x10845b0155e8ccf57d4e668a96c87e07ac2a9e7edb90e6f46578d2a608ff64f6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JP92N2221784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e7a969e03b185c38fcaea7235a3bc3b208083cea83f41da1ccc229180f3ae9. 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/JP92N2444215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21f8b29f23ab6c770609adb76501cf72d9b76e60d58bc3ffe915e4d4bbf221d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JP92N2444216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f389ebe03dee5f9070fdf0eae79a0dfedc7ca48e665d52ad66f572c39129874. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/JP92N2444218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa71bf7a80a06b77e8862c2b930bffeb01dda14585da4d5ccacdab4a188fabe. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JP92N2444219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad27df2c094ea26d55282229f7fae91ad0b7c1d73f8fbc7bc1842cc5e43f3e7f. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:16Z), 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/JP92N2444220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcebfefa02f89fc7dc3f69fb99b3ffb3dcbc12e386b3a2404c86ae2b19ceaacc9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JP92N2444221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a8d3872e49ff72026b452c26d33cd7825dedd98a7c3a0840e273ef10959855. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/JP92N2444222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0ea203753b4010cddb93b1b49587c53733c0b44bdb640751ea94a35d5b4748. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/JP92N2444223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb43a93dca6c0fab0701a0fa72c7905f819423b19206211c9c78d8b3e9cf9e1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/JP92N2444224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3fa42b8f34dcd333c295b43c188cd92bc79fbc6e850c92f12999945d41f8b7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:50:07Z), 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/JP92N2444225.