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 0xab9a9416a60cda32faa32a8105c1a6cd62b36043944be41cf3376a32ddf8d0b7. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcdfdeb3-a916-43a8-9050-6525a7978fcb.json and https://artists.proofprofile.net/proofs/artist/dcdfdeb3-a916-43a8-9050-6525a7978fcb.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 0x09a0b717032d683a89b20b794e61312420fbfae716f788793ddb67f2969ea806. 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/TCAFI2138616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1e57edee23f7368dfe721f7e3a3fe119047f837ea8c5ff2e7c0bc83b15dfa0. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:46:40Z), 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/TCAGM2212039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38b13588b44bc8261933fed8eee85491219af2eac06b004d8e85a1233b0e966. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:34Z), 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/TCAGM2212062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5f2ecfb4c94d1d7a8c24024110d39b892e0c9840fc329ace84fda51076e7b6. 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/TCAFN2129128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079e1aabb121cd0c6d66a710f025cbeaf2487a172ad6d1314f605e2e0dd57ca1. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/TCAFA2020163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6686f9320a305042d9c5a0854b7f6ec14dad8af767e7ba711daee030ffc89231. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZK6G2467754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5e4f73687e9692f7e909a3db6c319e63352be2c1b0e5831183e6b004468e19. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZZ7P2497689.