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 0x00fe61e332df187c8a9f3f36a344895077353317cb11f9ca6b2fae2cdd0ada55. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9af13cdd-86fa-4e17-9b6d-8d0b398adedc.json and https://artists.proofprofile.net/proofs/artist/9af13cdd-86fa-4e17-9b6d-8d0b398adedc.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 0x43f4af3f02f1c669d3398f66623ffaf44d6d92b91fa33ca06b974795c05f7e12. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:59:30Z), 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/VNA092301309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa96992bbcccc51efa65f79395bdabfbb33c07da49ecfcbe0016dd1bcea20c86. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/US38Y2508269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60395985f6c2c3866bcac1c63a4cb03876541d2cd70624c9f474d4aab9c53e82. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM6P42571833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c072c4fcb43d18228418d10b74ef487463e454dee9980035eb690f6975dce1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QM6P42571834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842f96a7eae77ad1d29c5303fb0bf0c9fb0f515397f6938458c1ce3802ddc8ef. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM6P42571836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3083e299ff6c1379a6b6556a57d5dc576ba4e74120aa4961516edd3dfbf3bd85. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:20:50Z), 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/QM6P42571841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4cb0a892fb4974663da78b9efc108087c0637b390b173abd64257d7a102764. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QM6P42571854.