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 0x296f8aba6374e0f8151f6d2bd632c8d4c7cba3dedd49b81c41ae0f379fd1d81b. 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/a3734a52-8e55-42fa-bff6-1d479e1bb60f.json and https://artists.proofprofile.net/proofs/artist/a3734a52-8e55-42fa-bff6-1d479e1bb60f.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 0x8d49d05b359152da57a7cd61217dca9e39380cef1ca9d0efd4c8ae9f491e9cc0. 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/ARHXW2100780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb16e1d301edf116ab9a1f7912eb78f4ebfdc53952ce1871e4110060bd56aea. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:38:03Z), 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/ARHXW2100781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c06a67e19094c300ce3404a1e333de1f6917566796728fc9b17121f90fc07a0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:48Z), 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/ARHXW2100783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ded0e41d3fbedaa6f027ed0b97f7b6400e83c174c29b9cc627285bba03ee69a. 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/ARHXW2100541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd0e304bce6e1fe90d2217fb4297d65c4d8a9ddc11303ec64d6f9dbf0ceff3c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/ARHXW2100543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca20b49c64499ba0f4e68079cc87e305d0220e10f2eae6924c9dcb4426323494. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/ARHXW2100544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe746db33c04d76ca8f9062e072cedf1915ae0d4f676bd5d9f55f2a006bcf2117. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARHXW2100545.