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 0x8e25e2b4c7cdab4ee9a7dbff2fd57d3140ed26a2c72618ede5837515f47e2c80. 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/bf49500a-2321-473b-86af-0ee75419657a.json and https://artists.proofprofile.net/proofs/artist/bf49500a-2321-473b-86af-0ee75419657a.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 0xc2c1ecc92e4cfc3ca72d90e969f9f45ff890e3b3c103c7db0dc0c1eae11d246e. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/TCAFF2056496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd264a2ac3f66cfc8ac5433c6a22ee570b8e28b570341ef7b51847d8d3e78cb28. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:24:32Z), 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/TCAFH2038290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e33b17b9eeba4baef2e8bf66c820733c02793b3e6c59ba8c790fe6551c9909. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAFH2038299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4359f1bb48cbe85a4adadbabdea41e5efb5e86f6047d1e9efb873cbc3d661cae. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:01:28Z), 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/TCAFH2038325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c004f1d56a99e7382a43f2dfd9ce76bc53142726f4cb58e48d9f7562ffb125a. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:26:34Z), 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/TCAFH2038328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf810eb87678df4b1fa495efba4ef2205a7fe127f360b2a152285588aa5ba72. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/GBKQU2560838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79dd7d6b437f5b2f6ea3057295b75b7e09da80c79a907cfbc0ee73d7cb60476. 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/GBKQU2560840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb553f50c664712a81f77b28d036d14fc542af328c01a5d987d6c7d2a4f3320. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:35Z), 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/GBKQU2560841.