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 0xff4b0a9db40087790978d54be2119e60b7b340414e6383cf3678080aea82d209. 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/01d56078-da84-4247-bd18-7dccb13536ad.json and https://artists.proofprofile.net/proofs/artist/01d56078-da84-4247-bd18-7dccb13536ad.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 0x381ae89bab45ab1518cc3ee584dec74a9ec36e8a3a35022f3714ac178dbcbb83. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:37:38Z), 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/UKJ8H2300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8458504526eb57278cb6125ef2b1104f7d42382bae86782ab64a9456b3e9958c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:02Z), 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/USA2P2408827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2155175df655e3896e8f43936a5b64debad60290ca89ce9f7585a4ecdc3456. 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/ING982400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66a90497cd914c958c4281a06a361af274eb718a0f419a646c0928c20933aed. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA092436024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855ffe107811110dae26beec96784e432cb76b9081a9ffa6a2a00e7438b874c2. 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/DGA092436026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ca5d50fcc8d1502acdd4a54d36a700603693d920b7e457b2b40dff7639de03. 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/UKJ8H2405751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1128d97bb6fc27c09d2d2bda192ef52d7c5b9393eabb992fee507bab46c7619. 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/UKJ8H2407129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda12e66d4d25ca77e579d1743a0a28708c35d87758487470bd0a636f0700fa7b. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/UKJ8H2407286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eadd30d8791c1856145ba472b1e35837def6350a7c004a018f97fce8ccbe53a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/INS172316509.