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 0xddfc58286d00ed8259e8b448fac2a370c806b3a580631b3227bdf5b4375618d2. 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/1ec357cd-2baa-468d-a439-4586460b5dac.json and https://artists.proofprofile.net/proofs/artist/1ec357cd-2baa-468d-a439-4586460b5dac.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 0xa16be2c0f9541992eff5d82bf8978fa7740fa7bf46abd5f95b04ac2ad533c220. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/GBLLT2240669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6930269c8906955e84c8e9523e3024fa35c2241b453b260c0844048553d46e10. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBLLT2346944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fd9bad879a803c0aaaa71c2a5f38e462bc3acd474469bef01d6f140c45db73. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/FR9W12419895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cb2271c31a340d17390a8f4f3daff54dc1d21e98a6e1631585472aac6240b7. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FR9W12421935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc753f08e6571e66807385129fafbb04ef0c06650f37c854043ee5aebd899a700. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:51:56Z), 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/FR9W12421936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ccf55ebd8cc250b0c96cff0eb72a334581c4c35f08d49ebfe64e51cd813d05. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:45:42Z), 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/FR9W12368708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d719d260420f857d77b41c9e101d66f9684d9075b54ddbc102ab036aa7d033. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:56:48Z), 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/FR9W12421938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cd4a154fec35b8b96c88033091e828ddfc25862bc538e5296eafb0fe7c9e1a. 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/FR9W12461195.