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 0xbbec6c4394aba8caacc3f1628f95c3a3e9486733efff325f7293ed654cf102ca. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/932e118b-55b0-4539-a09e-f66cc8066611.json and https://artists.proofprofile.net/proofs/artist/932e118b-55b0-4539-a09e-f66cc8066611.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Symphony No. 40 - Le Nozze Di Figaro
Philharmonia Orchestra Performs Mozart's Ave Verum Corpus (Remastered 2024)
Philharmonia Orchestra Perform Mozart's Requiem (Remastered 2024)
Philharmonia Orchestra Performs Mozart's Coronation Mass (Remastered 2024)
Philharmonia Orchestra Perform Mozart's Lacrymosa (Remastered 2024)
Wolfgang Amadeus Mozart: Kleiner Trauermarsch C-Moll KV 453 a
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 0xd48ecc6eddca6bde8b669e9395c884af61c1fb1daea636d5090ec63ad2a882a1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CH0279501230.
モーツァルト：ピアノ・ソナタ第11番K.331「トルコ行進曲付き」より 第3楽章
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff2acab3e35011c0b600924a92c5267f2191549dcebffaa4ce6326153c251bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPES00801932.
モーツァルト：ピアノ・ソナタ第8番イ短調K.310より 第1楽章
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ffb928d5060936e239c24de8c17d313163ba718988f8c6b67cf0ebd67899c1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPES00801935.
モーツァルト：オーボエ協奏曲K.314より 第1楽章ピアノ伴奏版
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc540260b843ed80db44ed9d331aff7450be3570f4b88230745134d5426bd7032. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPES00801936.
モーツァルト：「アイネ・クライネ・ナハト・ムジーク」ト長調K.525
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b693a21d6330baa1dd57bb020150a7748b385c4724394c374182d221927e1d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPES00801938.