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 0xef7a742afe2213fe0cfc8f05ac9a9155745ee20641d883fc7f03374ed771d392. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0af488c5-f6ad-4769-b3f3-f6876676560c.json and https://artists.proofprofile.net/proofs/artist/0af488c5-f6ad-4769-b3f3-f6876676560c.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 0x533706153f1716cb8c6797a07ae9c16721e79f1ad50e9be4f440a93b557cfc7b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:04:47Z), 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/DGA092349454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf723225b64a439ce81e21b9a3676d6364a28cfa346a54e5acabc5da26ce05047. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:01:51Z), 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/DGA0L2349677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782ff45054ac9e9015ae8a997e8dad220401df2fdb928b069b84a05894379696. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:05:49Z), 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/FRX762484571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f18cd982664f2492888344c21cb02ab46b74caecc5798def901d67ad216275c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX872456246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84c2298b2bdcecb66ac3b819261bceb0dce03038a29533088b08dc0b17d54b8. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DGA062444089.