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 0x500a40938511c332c83851f19826176fe21fc95ee670930b81d57a62e1c0c0cf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e632f98c-ea7d-412c-8cfe-a57967f6d7a9.json and https://artists.proofprofile.net/proofs/artist/e632f98c-ea7d-412c-8cfe-a57967f6d7a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
91年国立モスクワ合唱団 日本公演ライヴ！
ヴォルガの舟ひき歌(舟唄)(エイ,ウーフネム)
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 0x93352b55acc2a6a48d06d77608ef975ca28b29a5c622ccb23d027c4ccd378784. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPG200912306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede694abfcbcb91a0bae8e51555e61934b31afb141403f121e626b2f86d87bb9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPG200912307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b8b61c0e07594460e70f44c5cae88adeb43693b3babc51911ce98690ced8f6. 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/JPG200912316.
John of Damascus, Op. 1 Cantata for Chorus and Orchestra After a Poem from A.Tolstoj: II. Andante sostenuto
Московский государственный академический камерный хор
Rachmaninov: The Bells / Taneyev: John of Damascus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1ee9b5707c5fc06b9633e3abac86f39bfd68f2fa99dae1fc53eed199cce66c. 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/DEN960000486.
John of Damascus, Op. 1 Cantata for Chorus and Orchestra After a Poem from A.Tolstoj: III. Fuga. Allegro - Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6798856df186a8abc06c7522d028cf773e04fdb437f69ce0fac04507cbd770. 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/DEN960000487.
John of Damascus, Op. 1 Cantata for Chorus and Orchestra After a Poem from A.Tolstoj: I. Adagio ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc652d356ef3c313681491bde8785087fd67b8d38466b722f26e09702952065. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEN960000485.
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