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 0xbaa86a85405c1986422a234383dd43421c204018c95fef60e18a860653477e56. 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/f7962245-22a8-4871-b67a-68e946250a4d.json and https://artists.proofprofile.net/proofs/artist/f7962245-22a8-4871-b67a-68e946250a4d.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 0x4365b646d9accba94003ee5eecdad03ca15d8d28a216529a520d876fe87c2d36. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE6I32287115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd8f514afcc42c66478ae2674f37c1dfc3a59a756dcaeae65fd286f934affb5. 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/SE6XW2206419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c941c7aebe51b0b11a4139477a80b14af21adb03c930e060241ade3ec0e3132. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:51:25Z), 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/QZFZ22326679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49807448616a824cfb80d83c035c4b05a92ec96fa9ddd785fa4bc7c937922549. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:25:56Z), 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/QZDA82431991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8154c477bcafd6e86e87620d96ee695436c3e326e6352410fe7949f781293f04. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZDA62436833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9ff92f4ce7d61ddacb7311c186f0f89e2091e97449a5893c11148e64cafade. 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/QZDA62436834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca217ab059f6d701f646f183c796a6f947f4f32896fdb444e8b79bc5a1ff9be. 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/QZDA62436835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa0ac47d41a95f5bdee3961fa0a82f39922f0a1b2fc941d35bd3e3aad07bb85. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZZ792474032.