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 0xdba418eda9906aba433fbcba4039272e47b54be5c0d6127921061e399276eee5. 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/8c9b7b34-ac11-4793-af01-8376f7f65d94.json and https://artists.proofprofile.net/proofs/artist/8c9b7b34-ac11-4793-af01-8376f7f65d94.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 0x95efd87c636896b335494ac08b8779643c58e5563fd506fe167b930c9e40b02c. 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/GBMA21886505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99fd4524813f201eca53543e6d941f9e8cb28168ff424b8ebab72b704966d4c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBMA21886671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9d1a6d2c33f92aeb3d8ec3f72d2d3b044d803bd30b5dd0461a73f95566e93b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GBMA21936344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3764c8398aa483d24efde0bcec4dcf42d9ee83b1ead8b631174b4cc0c336462. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GBMA21963321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892f8834bd8a35de367bcce5dbdb86131f62b6508416e396bb19483ee8f4380f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBMA22061740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb2b067f67f182b288983bd60675cd8dcadd7f6e9072c12afdc97a8e4409536. 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/GBMA22103564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae23cecea58bb6c365d2f683f1e923e9c369f9edade1d672b3b6669be8a95f77. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/UKXN22238294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846fc1ee1ac5f8928f2ec3473e9c6e9a0183393d81fc28a432c819e3a9a95d2c. 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/UKXN22238296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3357528dbc5a27938497def21ee213b1b9f9fe1cb0c47aba1d945c6942cf2f1a. 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/UKXN22255655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a5ae5f3015a953462befd8eea6db252806e765920039871523f858aa646da6. 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/GXF9Q2418742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f73020d1f6e006fe632b48e918b0628d01bfb714d452c248121d529dc7f3c7. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GX3Q92596047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f629d382db867e6a5a22468680275922cbba24df830c840c9219e7acb37b91. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX3Q92596048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc8d7efdbaaa8dceff01904018912a9b289ecaeae62a7cd68614a75766abb05. 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/GX3Q92596049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c0028e4aa2965d653b7f2b86a16e79c6965d879e0301812edc43f04e2c26e7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX3Q92596050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dcb65dd41ca82a66ed73ce14413e40f7e5b06ddbb3b4488a78ac5760f78e4c. 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/GX3Q92596052.