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 0x3b5245287d1c47c86f97b5e636b955015591ee69d9230da85b6c12dc2e3f18b2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d30bfafe-f163-4c7d-b28c-6ac590032ec2.json and https://artists.proofprofile.net/proofs/artist/d30bfafe-f163-4c7d-b28c-6ac590032ec2.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 0x8c31c0d17ad7d50cc3e90f10c6e0dcd5215eb7bf87fa359217e2e403e71e7ac0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:11:00Z), 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/SEYOK2137908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17b4364235a51cdf8d041b4d9627f4fb5ff1e859024f236017a4979c53ab3a3. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:56:54Z), 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/SEYOK2223362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9740a97c36f707f01d40b7f9a09ee3a608da47f51515f59cec4a79651a0b93. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:27:24Z), 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/SEYOK2233705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3abd74091289753fccf738bf997b56e99fc0d89f2536aadfbd5fe5461c18d4. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/SEYOK2233707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d774920d3a661aafc7aa18a7f05c0cbd2e9dabcc3e2798b3249d963360d0f66. 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/SEYOK2233708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95933b4bc3a8c1219dbb06fcbeb1723f92fc5d5b378281598408904c71e19e1a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:25:22Z), 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/AUMEV2436560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6927e07903db4361b050f7bf359b34fea46cca2c11c9b45b7f4ab90218b38442. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/AUGBT2422721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77d1231157ca554597093766cb75b8fa648d04acec6e75a6ae13a3f89a66e4a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/AUMEV2546109.