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 0x9e07ec85eca014bba3067c9f6fe4ab41c30f4f4bb365755672583defed3e582d. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8530c19-8d65-4e34-8b87-4fc2f56b25c4.json and https://artists.proofprofile.net/proofs/artist/f8530c19-8d65-4e34-8b87-4fc2f56b25c4.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 0xbffd9549e4c33ab8c897747e2fe72d20890e7bc154f27a69e4fbcf0af45a1b13. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZGLM2423711.
Cartas de Pokémon (Si Fueras un Pokémon Serías Tipo Hada)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ff45f832bc823d1d14400c14f22b25b03d89494dbbacfd31be779a16c4a94f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJX2352706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2100d75771a12378da97a4dccaa47bca0f2ca6343bb595231783dc4a10fda00c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJV2468852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562f2f8a4cc2b405d810722c8030f901b0107766910123fc1699771ae17e164d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJV2468853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009e7851816cf22c030952ac36ad106d8bbdfb252428c00ca7432a4c2e224a4b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZNJV2468854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc217afd3c8c18898ed14fe178555ca88b217f1fedda4a90b0bbcb46ed1e2930d. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZNJV2468855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269a7d46336a3d44aa4430ff75cb306478b9e014d48c39371b179171d1742398. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNJV2468856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a950f437c9dfd155ee5160ac5d4f3ba3eb58eff3406f3d6857bd585665beb4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJV2468857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dcc1d8a0dfc0c2604a1367a8e43d617f23495aac4840997bd2781a44072c4d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJV2468858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc611079b68e2db7c710d6d99d1be6ff000c5c5bb8319f2b05350c8ec43ea98f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZNJV2468859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924bafcda3959fb79a1bdfb61d561f0e0202d0c692e1657504dbaf71abf0654c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJV2468860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca15360c0e271b42f6657b7239aa4cf19c7e217e3e50cf20d7175d85fea186d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJV2468861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d436ce247ec4ed55d71f3cafc543c249942ab992a6fdcc3e2edf2ed5b2e6c80. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZNJV2468862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da3d249f373d1066ae47ca63751166001b66bdcab02f4c55b49f040a345e22e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJV2468863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8deea1ffcfb39e4a4221044790e601e4b76bdaa62cff57a35514fcdb23f14cd5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJV2468864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf7ee84e2cdd0e00143cf6023f18cfba9f2b5c2575bdd189058fd6f09d3d05d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNJV2468865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524792ed6d731768543454328685bce934827983bda50135330ee26d61bf4d8b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZNJV2468866.