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 0x1ddc999237cf880e521d88e2e3db2e211e094ba9939ccc8eb5237d7a5c35b9bd. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a2be806-240e-4b89-8a57-3bcf52153ae9.json and https://artists.proofprofile.net/proofs/artist/4a2be806-240e-4b89-8a57-3bcf52153ae9.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 0x4871040785c1dabf8f56bfbee169d1f4d53271628f79c0707f22821d265828c9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/INV440201137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5367eba14fd3dbac9e8506af5b56c7ca087411bbab441f4b5414ade581106c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:24Z), 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/INV440201138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235c2c2c59294487cebb20975e53be95cf276adc2d18a4c0b24dca5ff0f18a91. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/INV440201135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ee326dd00973dbc7bcde9b6b0298cafc1ffbd471d4729ccd78cd726ad05d4c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/INH412109073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fba15c920fcb18ff593a20bd7dccbc9742a3b5009e5e8524a078927fbc8bf2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/INH412109320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97714a0aa31c1f40640b59ed24bebe8f8f03d380ed06685e57fef9138e35c8f6. 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/INH412109334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a3cf0910543e8d328d4986a135e8e2949a5e4619165ea5e8dbabf78a64a655. 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/INH412108850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe527e3b797527cc6fdb24b6998a0847313275034b78550ae9b9f1979bf6870c2. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:52:58Z), 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/INH412109067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693fefc891f248b2f1b44c6abab84221e86ade0a727417b3271f38aa79544f61. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/DGA0M2323204.