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 0x83d0796ec24d4170864678ac717258302b35c577c5694bbf982983153dec6f39. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/766ce9e9-48a5-438c-8f79-aa50d5cd0f7d.json and https://artists.proofprofile.net/proofs/artist/766ce9e9-48a5-438c-8f79-aa50d5cd0f7d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jewish Liturgical Music (feat. The Royal Male Voice Choir Die Haghe Sanghers)
Christelijk Kamper Mannenkoor "Door Eendracht Verbonden"
Lam van God - Liederen rondom Passie & Pasen
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 0xf66e81774c761df72fa1b261fb05aea1ff6ee60aebd6670a16f113140c62f69a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLY8X1803104.
Der Messias, HWV 56, No. 2: "Tröstet Zion"
Kammerphilharmonie des Mitteldeutschen Rundfunks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10e9673d49911f33276e8d2d7e670db2cd344723e1c3d82cebc21043bb46ab5. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEE869500317.
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
Der Messias, HWV 56, No. 3: "Alle Tale macht hoch und erhaben"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abaaae42445f0b580b7458bb6080f567e1b2c31881a853e75fc0a1e56441622. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEE869500318.
Der Messias, HWV 56, No. 18: "Erwach' zu Liedern der Wonne"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3466a1ea0fe462e15946eab0d86959f278f0f576b864e47b7abde89e16186765. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEE869500334.
Der Messias, HWV 56, No. 50: "O Tod, wo ist dein Pfeil"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7776d9e3be0148c9f707dbd3e2902894b4d4f7d7c52ae10cc2a8c3c6c8bb1b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEE869500363.