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 0xc647fd9467cfa02834a8b1569253efad50400a931b549ff1f1c69ed1cad3fc0f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c801e70d-5265-4f60-884c-6ed7dab517dc.json and https://artists.proofprofile.net/proofs/artist/c801e70d-5265-4f60-884c-6ed7dab517dc.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 0x133e6b18665d0483ab6a39e3dbb8bd71b33138a5dd95ea9cf7fd6b50161b16cf. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:37Z), 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/USA561044868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a2c0f590ec66bc3d8f289013482d5c43e04cd6a8254f8c5d2ec9220fd6f53f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USA561044870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda816996ddabcfba3956148f6f36bccca80a93cdd43961c39260923efec1f1f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:32:52Z), 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/ES8020900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614f3deba907d08a57d40484507f11151cfb5fa832f5acf20d10ac6c338b8b52. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES8020900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48ff124c2e63e4fe45cbf07a4fe8fc6d0da3fc263d648cf289768f126a7223f. 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/ES8020900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346fda961821ef7aaa32f3ccde289739c01fcaf9ac37ee6e4871f79d3a3e6f79. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USCHR1340129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222ccc83e79e63002624c0c6267f8a8f80c96c51d52268f1b6b86bc8a158cf0a. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:20:26Z), 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/USCHR1340130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7198bd6cbf9352f377652991d231b38839491167c9d120a7a6bc2e2028216ca4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USCHR1340132.