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 0x13ce32f4787712fd1b876c79912e9eb2c50f2c881ffcd8c6b8a4c717e52b3c89. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a1ea06d-02ef-4cf5-8441-975063b9f589.json and https://artists.proofprofile.net/proofs/artist/9a1ea06d-02ef-4cf5-8441-975063b9f589.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 0x203ca661f1daf18855f703f835240d6d51199aa4fce3fd2e6c89cdef53dfaa93. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/GBSMU4866908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa692746c45b11065c9917c8a2a4b7e042b5c8cd81597e6ae37522379ed3ed675. 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/MYUM72000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffc959ef46cc7ecc89c9c7d0aae9cbedca56928742af1691603d29f4a2dc10a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/MYUM72000253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95568b35903cb9280e69ab289c69fa74b0cf7755d32b54a5fd3272479d9d6421. 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/MYUM72100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0bd6d3a6c6a1b21ec8f21f451348debc4a35da2bf3c091ac441f73b566070c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:52:38Z), 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/QZFYY2374904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569be009240a2e8984d9661f1ea30425dfbf027e4aab3e2aa3771df47d576f6a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/MYUM72100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569be009240a2e8984d9661f1ea30425dfbf027e4aab3e2aa3771df47d576f6a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/MYUM72100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9aba399ceda42c0fd52d8f6d0cb50d9e431b1da107fb915c0ea46acc77650d. 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/MYUM72000019.