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 0xd4a8e10556f34cabe80738c7ab376aa1450405d4ac49d1d4af7369de06c88ebe. 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/085155f1-1689-4627-a3cc-f9146bb415b0.json and https://artists.proofprofile.net/proofs/artist/085155f1-1689-4627-a3cc-f9146bb415b0.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 0x629670d000d2ca23685719120cbca2be0490ddbe573af51deaa108bba3809420. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:46Z), 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/QZNJX2338496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b133f5472896384ce4ef5b714449e5f1fa45c1f4ad2ff44ec82603b4d2025a4. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZNWS2336035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fd489caeaf2fde0b0e2dd474f1a2ee8b80ddb52c2d305b84f0f26244a9e779. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:55Z), 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/QZTAY2315925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf539870c7e82646e181fb151a1afc5ae92f1b0e335136e72f01791a8e5c15178. 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/QZTBA2364082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb161f5ed0e5250761a9a679151af8cb81ff5d2f98f9ee3413aa435e1bf03a79. 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/QZDA72407820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958b9622006c81639a8bbd8ed61544e7de3f31b0e2404e3ac74cf933ed4f6063. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ22519239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1983a6885db8464376378e963259f6d6960679487422f4d3ef5bcf4199667d4d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTAT2559801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7feb239481e2933d37ffacb6f653f98ab615407fe9f4730405a07eca91de17d5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QT3F72567318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdeb7af7e8f21f556ece845409b0224d6d0aa213286b37b1f22abea60acaae43. 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/QZES52554065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56bc3e5a9dbd8f96fe80d9d6c82ddd45d818344c0a03c5f2649027eab737655. 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/QZES52554066.