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 0xedbee86c551bcf219bdb1827e0d14f7dc0a56845fe5bfe4953b0231e9ebbe0d2. 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/1f014d11-7476-4bfd-b2d2-f9c3300a6303.json and https://artists.proofprofile.net/proofs/artist/1f014d11-7476-4bfd-b2d2-f9c3300a6303.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 0x9d6cc5287e1f4055723169bd93356900d37d1cd1e5cb01c6c662b0dad39361a9. 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/ROB011675115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b438fc7230b25867de7ed92f4fabd7813f02b8144ccd0224fa3f17f57a4d14a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:59:14Z), 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/ROB011675116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff04b473793e2a2c37f645b91e8180ad744e543b3b0932bf4ffe3b910e0f9739. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ROB011675118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa34d88b142d4c920b301a433fbbd8be521c3e311a730f879ff5ab4d05460f3c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:36:35Z), 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/ROB011675121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d5c5c537265ea16aed55888ce7b3f5cc09c1efe3599682c77c8e8c4b0bff8a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ROB011675126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179027bc137792f336b46723862755bd1977f00df42fa05c7c6fabcfe07b5255. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/ROA010800641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f71044eaf7c9805aa618f54fc9fd10c6874adaf7d9b5ae7bbc0e9c56036bc7e. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/ROA011002460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5385c2ab71b9b28674439d768021d21e83c2a5ff949b3c4e1cb65c6962fa2a95. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ROA012002760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90f2e55ec53810262b8b47a3d2f678efbe33282f2130f73ec91ab63bff2eb52. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ROB010804464.