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 0x44169f14d18777f28e2b1f3e186d86eb75d7a1f81100c85c4b517f6d6f03cc45. 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/51e1f309-4876-448e-9e52-c6cd37a2b2d0.json and https://artists.proofprofile.net/proofs/artist/51e1f309-4876-448e-9e52-c6cd37a2b2d0.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 0xceffff765bbbfc4f8229dc4f457996edd20e8e6b966a254384793660bd6679ab. 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/QZWFF2314892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183a73c045d0a291c6409192133aaa811e135b07849b08df19f7189d027d8953. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:07Z), 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/QZWFF2314893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843bb47915f5674abe6e943818ef2a56a6b20852b4ca0741872db2b39edacbb9. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZWFF2314894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe837fa744e64b0b9d7f6f3b9ce779bffd9c8b3a8a415e4ba626950d18e89bb62. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFF2314895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff873454fe7238d2b7584ef925dc59a39562d7429338fe6d92b319baf651fa18. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFF2314897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b016e362c3057d1b677470e1ebff5f7facc0fd511af69b74e73f8720b98776. 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/QZWFF2314899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2127832cd494c3fc79b90c82fe1a7f9d5b14bb74da3bee83eecc509b4858652e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:19:15Z), 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/QZWFF2314900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8521b41eb5b4abe5285c139ab1f6eeba01b54fb202b9d3f2b6147f320cd8340. 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/QZWFF2314901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c7f1b02d8c96fc402ddc606c193f42d81ecd215ca14c0b32391c479d19d470. 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/QZWFF2314902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa274715678d02aa1b1ae96d010dd54f739186de25a07767171c20e937ca04bcc. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZWFF2314903.