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 0xb21a6b6eecc34c5ec381de992cd0d180617d600effb606a682de8fc5678af6b7. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4f47888-c8ff-4938-81c7-2d414fcc9b5f.json and https://artists.proofprofile.net/proofs/artist/f4f47888-c8ff-4938-81c7-2d414fcc9b5f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Promise Mascot Agency: Side Alpha Chrome Yayo (Original Game Soundtrack)
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 0x7827f34a3a665475cdec423ded6df284d8d336e745a6c35848b8994802f79cc7. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:10:23Z), 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/QZHN92571883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e413af886de1d76a71bcfa96461c3af74aa463cca9057abc2143a9ff9f066b7. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZHN92571885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ae9313f631d4cc738a7b21db2bfc5d3f5e0a7764c7ada1269f4e4c1ede3b7c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:57:22Z), 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/QZHN92571886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923ecd693173ec43ec5685b738d8cde56f1f10e2556b30f7cdc256c8f978f403. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZHN92571887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c06f33ffdde2ecfabf39f9f604d89698b4b1ef4dd0a59c07544d87354abbe74. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:39:48Z), 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/QZHN92571889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc24280bc9368f7ea5a1207190220e3baecd354acc2b865eefff72556bef521. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:39:42Z), 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/QZHN92571890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67f41a9bee5c4456c1366ffa4aa7919196f6ad528409285829846428d5d656c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZHN92571891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c2ab805a8de9c3acab45ab8f1ef4338bb7926b71dd2d3f034e53b887081956. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZHN92571892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff1c7c76cbc083a583ab682d1b03098176f738d9e2e85360f8bb54a2a184699. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZHN92571893.