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 0xd259c97bc05ca995dce34b1c9b4406fd2065994373cab9710828553cc12b5a81. 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/ceb4d270-534d-40d0-9589-3666eb757373.json and https://artists.proofprofile.net/proofs/artist/ceb4d270-534d-40d0-9589-3666eb757373.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 0xc7f8897a78cd252880457fa51840cf02fa4bfaee0c52f0ac9633f0b7846de085. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZ8LD1903343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7d65c1b58ac78c56c8d23c5c63904f48dff51175408492ad05349183721b09. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ8LD1903344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13af1ef0147dd36587afb8dc2850a47dd13ac469d745273b3cbc354deaa2d06. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:07:15Z), 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/QZHN82062927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89ffd9bd220e30e4196d78e6de8113dbb7f3f819cd07ea1862d49b79ceee23c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN82062928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46698a4383c9c56c8d5608ddc6abaee9a52e3d0f6a6cfe6f0ab3cb33ef2adfda. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN82062929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f04ace42391197cf6f3228221b71ab1d2b47deec14b9922de60a01ae46ff5f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:19:30Z), 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/QZDA42221722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dccbae6e5d0f526ca6b2ceeacf4ba2b95c1815d9199a9d3b1b3ead16c4722dd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA42221723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d10a5b9869ebaf500393851e84158e3cb40365561900570353bf337cf396bfc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHNA2207999.