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 0x09ba4d8c7a9e9d14ef0a2f71bbd7ac4d07e3afdb56ecdb62af6732e6b3b12480. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6081bf2c-8306-43bb-9d42-43767391b67d.json and https://artists.proofprofile.net/proofs/artist/6081bf2c-8306-43bb-9d42-43767391b67d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jach'a Marca (Folklore Andino De Bolivia)
Ruphay y Luzmila Carpio (Bolivia y Su Folklore)
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 0x238de31559cf35d132787c001a62d87fdb70c366c22041c52a62d5aa1c11f8d5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:23:28Z), 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/FR10S1519532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49105c74413310034e1dd9ad01ce06f2b71145daada2263141825fc313ce26b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/FR10S1519534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbebaff6f1f425d91fca8ea36f2528a7fa768f865963c939dc8318785f53edd3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR10S1519535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc2615af786d2b3a3473ade8e1803c60383983d11ce4a55da806bf601fe8b66. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR10S1519536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22569419db0f4b18b01224a6b9a32774262880d6d71cfd354211dd926795481. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR10S1519539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b82cec2c8117ed8ab8122fe68e12241dd208501700da590fdf5e83c621baabb. 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/FR10S1519542.