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 0x585fadd6768988058e879008f5c8583d036b43f8422dd36479c098cbafe28ffd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6cc463e-b352-4ebb-a9d1-d21758ff5921.json and https://artists.proofprofile.net/proofs/artist/b6cc463e-b352-4ebb-a9d1-d21758ff5921.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 0x49601144a6cfe0c24ae56c626d2f5a647816519c79b923cab575acfb7a21e36a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM22137785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c04fbb6edde4d82fa02662e0cc7eff04c96894a13151f7792eca989c6043b9a. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USL4Q2187358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8112e9394a982b29960996b459cab0cbba7496a4e2ffa739bbf1fc4b92a172a4. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FRX762215655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b7b4270e1c51a9f8556d82bcdf1c66edbd01173d2fac63b8caf68145da61b8. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:58Z), 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/USCGJ2221420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5d606fe590fee992cd2f4c0cf4f38fb3c5d1a7b1b121936f0377dcd04af27a. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:55:58Z), 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/FRX282226568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d490e708635e387b494427e6de6ca6ca9526124ddf1f5d25c486bab936d77b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:10:50Z), 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/DGA052204612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672c9ad25e3461c1c443258d41f72970691689edfee9b9f3e8d723ca6bcfc12b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DGA062249703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46aab76c7fa38b86cf3c4f454f6df2b5720db54cadef04aad4e3e73ad7f33eca. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DGA072255342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5c0ff456767eb932a836c75668c9920ccc3225bb7a9923b3984c760675def8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AEA2Z2422052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5040c86ae9a0d5b1f114b3d4ae84b56d1ade56ae9774e23ac231b235285536a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:11:51Z), 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/AEA2Z2442778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f217952d03f0c9ae8fd9dbacecb9ead3b0d4455f533714fb71c094c934ae6a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AEA2Z2482642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c2b96226022be8fa128df459ac1c9e49aa289d5cd505981c0a128fa1c941f6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AEA2Z2507469.