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 0x719f900d03b895034e5ad6e75082d7c646f76376c9f213b5bdf37698edd500e4. 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/2ce24e62-6c46-4d6d-a3be-f73a26f3cf37.json and https://artists.proofprofile.net/proofs/artist/2ce24e62-6c46-4d6d-a3be-f73a26f3cf37.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 0x1726be682be5c3b30dd659d500a9f148cc28554124d1776bd8c1f096a81d3fbb. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZDA71955938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbdf34d5623533c8967c2de5b078733a6751702cf2740b44ddc332c8aaa901c. 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/QZDA71991659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faa84ceba89b400ac341e7ff59bc661a0d5b593e710259c7033ac7f58a95280. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:22:51Z), 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/QZDA81842247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd995d9ac45192b7347a630b1627d88674a83616565a4c54c5a5d47c39f6474fa. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:26:03Z), 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/FRX202075933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb659f57f65acb8bf9fbb6b59b83c31fbc33e8607b20a9a9f63d639197c76f4d2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZDA71956311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc89af268be7f5ee85d06a020794695b50fa7220db0244e9ef340e1abb432a7e. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZES71991816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bd3960904caf975bd545fc7144f767c5133190c0eeeed2b68d8be329e2c49a. 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/QZFYZ2022817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b697622b6d0152d03577a75b09ebd2fe61da1631422a5143ffc8d758bfbc549. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/FRX202099337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aa939ad75ab43b69945ced57751baa85ce52a6137f3b943cfb1ddc013aafe2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FRX282185680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf609407656fa4ef59eafd217988702edf83f12ba8224a7bf25462e7c0c73461. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRX872155498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f801f27e9f2a68c6c32b06feec9bc1d44542dd441c57d6f4e1907d258a120d1. 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/FR2X42262743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e3bed71fc0ced0969ed3a4702be505d0776c4c814c67cc7037b9b6ca4c0113. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/FR10S2365747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd227f86acc8026eff520581efedc6139231f50361ca650decfc980c0999fe437. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:34:54Z), 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/FR10S2428735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41edbfbfadcc7cc946fa7cccc689f77cb8ff111a3632150ac77302b56bf4c21d. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FR2X42478792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe430800befb24f60bf015dc50719a39a4b721f107feab7a899228f664d2bcecd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX872517748.