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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31435d7a72abd299a86f53ca472bc1ed32fce67a01b37466dd62440185d6962b. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2af27f8c-b88f-468a-9941-be6f576660dd.json and https://artists.proofprofile.net/proofs/artist/2af27f8c-b88f-468a-9941-be6f576660dd.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b26d74dc8e960ba0ad25ce4d3214e5eb63d277c5c47834ffd29170b42b111e5. 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/ATX742105001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e853e35fb92d4d6303300cfe8480a08df80cd033c3c361e798b3ac42d180eb7. 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/ATX742201165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfd6c66b282a80d77c19cecda3e4b7a5597c6d67184ffac7b90d3f01cbc9f12. 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/ATX742201197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492e04c1f43fee7635afe80882978e1524301445ae3daadc39bffda33eff87ce. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/ATX742201203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14df7be973d6b14fbf40d7c0d45972c70b71c8d97abcb57416eb412b748fa2a. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/ATX742201171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954a95c748768c616328e59e7f1953565f7ebff820d490fe9f5e52eb1912a0ce. 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/ATX742301221.
Tiroler Weihnachts Swing (Let It Snow, Winterwonderland, Rudolph the Red Nosed Reindeer, White Christmas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146a17ba43d63388184513197e9a099cfcaef188e05b127ea68d2d88cc5a0e0e. 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/ATX742401292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9235146dd83dbe338a544d5f5345c32d9e4bfb3098f56dc66fdb8e7a2711c10. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/ATX742201176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1372db3960b29e45f30169331d9eb9ca1304bcde68f39ce20484fb5a8018e035. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ATX742501345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efe9d39122cc0f1ee5ee49121aa6d8ebec941f8273a258f3df50a2c83718170. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/ATX742501340.