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 0x007f9b78f1bd064fcfb97a71f9b3b5d4b9e504bf09768467db9ec6de4fb4b041. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/465fdff4-70e0-4630-8bfe-b7b58f986e19.json and https://artists.proofprofile.net/proofs/artist/465fdff4-70e0-4630-8bfe-b7b58f986e19.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Liturgy of St. John Chrysostom, Op. 31 (Excerpts): No. 1, The Great Litany
Rachmaninoff: Liturgy of St. John Chrysostom, Op. 31 (Excerpts)
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 0xaaf65336a539a8db0e95f8165fbf2184c5eb146cc005b3365f281dbb554b0547. 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/SEAEB2171010.
Liturgy of St. John Chrysostom, Op. 31 (Excerpts): No. 7, The Augmented Litany
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93abe9e1bb1eecd3945109f92ef1f7bc4a9dab38fe4353055cec93e34c33f248. 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/SEAEB2171070.
Liturgy of St. John Chrysostom, Op. 31 (Excerpts): No. 11, The Eucharistic Prayer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e716b2e7643927dd9162b2e42b6bdb3ec5a5d0bb1113f3221cbf124dfe9fec. 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/SEAEB2171110.
Liturgy of St. John Chrysostom, Op. 31 (Excerpts): No. 12, We Hymn Thee
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0637de0acb962db709c361961d4d4cc3fdca81560851110e908d2092774c7905. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SEAEB2171120.
Liturgy of St. John Chrysostom, Op. 31 (Excerpts): No. 13, Hymn to the Mother of God
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7640216300539ba7f13c755e2d8d4bd1f9dbba3e5e517a1f4905d05ca1db34c2. 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/SEAEB2171130.
Liturgy of St. John Chrysostom, Op. 31 (Excerpts): No. 14, The Lord's Prayer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8295413614bd726a6bc51578d9e678d4444552d1154e33308f324ccd530d8285. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/SEAEB2171140.
Psalms of Repentance: No. 2, O Wilderness, Gather Me to Your Silent and Gentle Lap
Alfred Schnittke & Arvo Pärt: Choral Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925fa2e8ef7f051ccead1c1181501cf6e03ffd78fce3d1fd288897021db6b2ca. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SEAEX1792020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ebba3f1e86974f205d934cb43d6bcf6cc79ec9b73014001960e10c5c19c33a. 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/FINDE1500196.