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 0xea9c4a1cb167c04060618fbb2324fe737b74aa47abb8c900480feeddd66d9228. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/977a730f-4a6c-49ab-997c-c79004accb52.json and https://artists.proofprofile.net/proofs/artist/977a730f-4a6c-49ab-997c-c79004accb52.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 0x463f37944c041646fdf8ffdd22f6154639d794bb6a47c218d8479615d8dd5fa5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:07:18Z), 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/QZMHL2205393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1257eff395f0b23bf15e96e6ca7d3b1621b18fbfdf47279d50e7c8709b31c8c1. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZKDK2260294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74982745b205818c394ff495a5c9b96b1c44858b2bfc564807856834fc497f2. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZS662219574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda77bef151bb1e00debe9b0c11c1d0d76468984a74baad7c14b81e006f68e68. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:06:01Z), 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/QZS672219764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae65fa231185a45cbc1fc5934f1b5aa6856bc6fb4a96e5decf4b4e6913ecfd5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM42K2563171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463f37944c041646fdf8ffdd22f6154639d794bb6a47c218d8479615d8dd5fa5. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:10:34Z), 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/QZMHL2205393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0366628092b519b581216a93bd902aac2292e8bce8553629aee9160b9ab00729. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZS632506588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74982745b205818c394ff495a5c9b96b1c44858b2bfc564807856834fc497f2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:28:07Z), 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/QZS662219574.