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 0xb93d435536340d619f00cb0c86ac287ef1a60fdc150aef8e0c4e8f135bd6020a. 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/3dd1a1ae-d140-498c-b41b-4ee8affa7d6b.json and https://artists.proofprofile.net/proofs/artist/3dd1a1ae-d140-498c-b41b-4ee8affa7d6b.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 0x31343d02ff61bf194b13d82dcbfffcb263c9f0d94c2c0bd7416dcb35c5c175e5. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/GBMJG2101784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d61aa2b51e3e28b3dbc684a66ec952936c54ad86aa47b7a5fd39a122b993e1. 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/GBMJG2103595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702e26ed5d4f4eb49340b5088a7dd21e0733432cb53940c040a86aeb0364e99d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/GBMJG2115389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d3cf9df9db9d3ba872df2397b3b5089ed6f1907856bd40ab07dce9206a5e47. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBMJG2116566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ee2871ba68e83fe257b1d7ce7cfc8b714bc3ed2bd4facd054451e6e7360233. 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/GBMJG2121941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0a284362b5f537f00dfe37b36bd7f2c4dc0cac7c162a9b4590fff7e9547d65. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/GBMJG2210209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fabff2218ab09746b7031dc5d84fd0cd95c723deca9a2580c6d24ef66227a7c. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/GBMJG2211303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f4aa13afec7ccf6ad71af2039ea945d266660f151a6a1694bf45bd26d6e068. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/GBMJG2218177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3273eaadc794101304de080bde4ff85502669df532c3199ecb75ad82254cd67a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBMJG2221350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb379bec2cdff9c4fbeede8326ec30f67bd0bb58ea8101bda6c598f94ba6c47eb. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBMJG2228324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe202814614c838c2bf3b92cdc9d4d005da10fa229948f112464109c83e646e5. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/GBMJG2307276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5ef0cf79b446354c3985ee70ec7b32a5286dfdce72bde4c38e182883c85d8d. 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/GBMJG2312281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebf5264991bfb14a5628c3bc7e7b3bd8c48531375fc3207d0c72730f7eec90e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/GBMJG2315046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fa0b484cc7430d1035076fbc4c12497baced57fe1d4efd73b6cc2e79c71a76. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/GBMJG2329708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd0f90e6c86f5509119c0ffc001b5fabdc4dcaab8af5959a61dbdf243b04558. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBMJG2333038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e61b23ef0ff0c570334505463b0ad98fdb3aa2b96e33b4c4270cd4b46e91a9b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBMJG2405836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ebaea1830bdf5849d198a50a9ed0ca7900b3065b05ffb0b236e7298f5372e2. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/GBMJG2103594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d468f484de8dfdd5def6771cda954a0c916dc731762740e6c784eb7e87bae4b. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GBMJG2415983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e1ba2bb72eb1b4c7a68a25eeba1ec064769bcbec371691aecdd9872b65f18b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/GBMJG2511848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a58945e521e77caa44d7aeda1f42093f57fd93017fd4e799907c0e45f46af0. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/GBMJG2516069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x209191eaa5a2f72306b3a7798f6800c5f23644190d5987ce6877a33f649171c6. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/GBMJG2526666.