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 0x439ea016b55845216bebee069d648b5764b176e5688f66872d6ec72cd3acd661. Chain 2 (Bitcoin): anchored in block 953915 (2026-06-16T08:36:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a93dfdc-e40f-480f-bc15-120b93ec20da.json and https://artists.proofprofile.net/proofs/artist/1a93dfdc-e40f-480f-bc15-120b93ec20da.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Salieri: Mass No. 1 in D Major "Emperor Mass"; Organ Concert in C Major, Dixit Dominus; Magnificat in C Major
Mass No. 1 in D Major "Emperor Mass": VI. Agnus Dei
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 0x224e6369a2e468526b1d124513bbed5a6ba25febf19b1a77ba2b8c9f14e6a78a. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEC989600279.
Mass No. 1 in D Major "Emperor Mass": I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1732cfff9aff679b9196973579d6ae24e33ebdaa1676195e6fb705219b49f439. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEC989600274.
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
Mass No. 1 in D Major "Emperor Mass": II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f90c040f350961c9662c8cc676b14a3dda20789a30f7d60bcfc1ca09c21437. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/DEC989600275.
Mass No. 1 in D Major "Emperor Mass": III. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acc17ad32e3110fad419b533a9b1f4222e23b35a02466bf72f12b00413f72e6. 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/DEC989600276.
Mass No. 1 in D Major "Emperor Mass": V. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ca5b9ac0806b65666f8cc92f13e8e176375f6f93d350f9435201873c275d3f. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEC989600278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09dd97cc2c230b1f9dd0b093077526a91cbae356c2dca7ef58538670920cab28. 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/USSM12006139.
Cantique de Noël (Minuit, Chrétiens) / O Holy Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9183e11f87c2595db374e5d4df73b35686932fd1dc9f4f33f9ab40b7882dee7c. 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/USSM12006136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6134103cf7a4e56e518cbf12255771a639b766b1d1c7ef5b9027509b807a1a5c. 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/USSM12006113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054a0aa81528cf5997ee820f265ab0c2beb92e18a2d304acc151345486da002e. 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/USSM12006143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bceebe12f5ff3b970abceadbce742dd8ce337df22695900b9429cf953cfc9df. 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/USSM12006129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edcbba5284be3e3cd8a1b000c0beaeb66be1b799f4c76eeeaed81242c592c73. 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/USSM12006115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae58592e8a4f5844180608878b1d89ceb83107fc5e9b139f896b8f2888857ecb. 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/USSM12006137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d9f57e1eccd7aaa7b01133ebd1dec7201074095d1bbe824e23088978b9f7d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM12006118.
Ich steh an deiner Krippen hier, BWV 469
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8683b5707b42d893ec8d0e8e730221238bffeed7efd245aff45f6fc39f08fcce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM12006123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe850fa7beb5819155cc789e82c513d3b330471c88f09a183953c20d97f4c3ba6. 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/USSM12006147.
Engel haben Himmelslieder / Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831a097764ece82b7ce7cb66b5d7a6629d4911aaf8270cbb0e9aadb7e79251e6. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USSM12006109.
Joseph I / Ferdinand Iii / Leopold I: Sacred Works
Aumann: Oratorium de Passione Domini nostri Jesu Christi
Aufschnaiter: Memnon sacer ab oriente, Op. 5
Bach: Violin Concertos, BWV 1041-1043 - Psalm 51, BWV 1083
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5a709f46052fe66ba6a839ad0fe3ec8d072b9e5b88b46360dab4fe8fde9923. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATP131301420.
Der Mond Ist Aufgegangen: Die Schönsten Abendlieder
Nun fanget an, ein guts Liedlein zu singen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49004e88a9dd7278ddfb1ca6cbd1028b91619f67848355663a9444d16afb28f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATS720114238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad828cfccc1d48b4335b1207507f41c791941a67ee14c7f0b1808d29575651b. 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/ATS720114250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64512ad1ab6c599d03913aeb932a1c0735eb34b50600f3838f31ec8d6fa7e2ae. 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/CH1491123403.
Jugendchöre aus Österreich singen Advent und Weihnachtszeitlieder
Hochreiter: Requiem - Missa Jubilus sacer