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 0x4628b2b67d9b3a10322681a8f5b813e672a53e9e2c5d0a39be9a7fac9d7073ce. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa4d8b74-adde-4aaf-a1fb-b335dfdcec2d.json and https://artists.proofprofile.net/proofs/artist/fa4d8b74-adde-4aaf-a1fb-b335dfdcec2d.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 0x0c518e6e7d567859095684b74c26f2f664d725b08443e9c2fe7bbbd05eb1d286. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZFZ62039911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a016bf6799836b6a3ea6d4ceafeb3c769e6d86f50e0c21dbe3a882fcb9d1aaf. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ62039912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9575bde19906aaa46aa6eacbdb3b32f6ec9fcf9b9ac71541811b1e7ae577de8c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ62039915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd727b5b47a7f04c400f8ea125a312d998433483f72d9568ff9f8844e99121e17. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEX262100168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffefd6ea0f331ca683969222463670728c4a51da329c0d36ae7836c6162df501. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:01:04Z), 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/DEX262100169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9caf1b4e52d122506846af2bb5d01ef1e0040e19db52e754a43df8bde7c20aa8. Chain 2 (Bitcoin): anchored in block 956426 (2026-07-17T08:59:39Z), 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/DEX262100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dabb5403490bb376ccbb6de2b33593df4068428daf87c4ecd0c1dc2e8d4c64. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA72161759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37448513053b0be5144a8c8e61528998ae06cb85ab4473da2c4680149a5a3200. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/DEX262200174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccfe705dae0fabb7202bb702dacf494b14d0c44ecea44f3d1393b876a2523dd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAN112400774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9254d1c3d89971e4ec9f2c09b432202c3882f1fe05bf9ca16eb2aa28887bd8a2. 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/USHM82189949.