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 0x3e42d2ab61b2fa41baf31b91439c14ae5e6a4ac0b2e9e3907cf256e9f27d831c. Chain 2 (Bitcoin): anchored in block 953892 (2026-06-16T05:01:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0de933da-2f0e-40bc-a41a-930707a7c61d.json and https://artists.proofprofile.net/proofs/artist/0de933da-2f0e-40bc-a41a-930707a7c61d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wolfgang Amadeus Mozart: Missa in C Minor, K. 427
Mass in C Minor, K. 427 "Grosse Messe": I. Kyrie
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 0xbbe265e403f16af55d57f67685bb7a9b5001be33e9e5e67a31e5ae9e69537cef. 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/DEB111609601.
Mass in C Minor, K. 427 "Grosse Messe": IIg. Gloria: Jesu Christe - Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe64dbe9e014b787d0b8e98570b8350da62ee04a090947baef8ace7740d3c06. 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/DEB111609608.
Charles Gounod: Cäcilienmesse (Messe solennelle en l'honneur de Sainte-Cécile)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cc860bdd2c29d525873f7147490eeb5bc91ad6933be0d6b85114b44a273644. 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/DEN421923001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d97af4aa159c4d5c198e8dd154ddf95de4c25f45bda927af407e99e410513a. 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/DEN421923005.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f915af18481477485b56309244a9dfa4114bf7794997291239ec172bbb67a. 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/DEN421923006.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb90052a769fb4edba57947f4c552eb5d2b60e65d4b38b38aaf6b0871fbc379. 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/DEN421923007.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af3f50ea4ca94b5a40afb92418afeaac5c7ae8828ac92160d68e37d396d011a. 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/DEN421923011.
Matthäus-Passion, BWV 244 / Pt. 2: No. 33, Und wiewohl viel falsche Zeugen herzutraten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e9b1c8d87ec5d7e47bdc420fd4a2f8a22e60d4819ab513a76a45e5589f95af. 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/DEB111600304.
Matthäus-Passion, BWV 244 / Pt. 2: No. 41, Des Morgens aber hielten alle Hohepriester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3701a566b9af24967f934954f1033b93aab83a6bf44512156ee824207f3974d9. 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/DEB111600312.
Te Deum à 8, MWV B 15: II. Te Aeternum Patrem
Mendelssohn: Te Deum à 8, MWV B 15 & Other Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44298cfed4be68f1927b78c1bdbbb14be0e26669e5afb07fac179312fc1f557f. 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/DEAD62003402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbffeb94a77068bed6262b0fd074a584f8e9a1bba2cc4b7e5922aba2eae01b1. 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/DEN421923002.
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 0xe3194e42da386f5ab9cf88569d6703a1ce99e40d2925c404950e102a751aa6b2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DEN421923003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20e24d1b306280dd13b78fda110a614251edc93d18386e3637ee228972b1cae. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEN421923004.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5ff04b0551fa37dfd0c8cf8168148c0b26063687a157a808ed8369cd22622e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEN421923008.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Offertorium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d88703ad09d163f6384bc46ecaea46588200b0a8b3c7cda2b76f70cc23cd63. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEN421923009.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5356609821385720b7497bd71bce0ac7e5ea295c6ff6bc5cfcbb74b43472e4d0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEN421923010.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67dba4ec2ff1acfae7934aa7ec00bc295a44db9707254fed147ad2122d0cea5. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEN421923012.
Cäcilienmesse (Messe solennelle de Sainte Cécile) G-Dur: Domine salvum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b90cb2ed3909a47b66fca4dd745bd94cb6e79ac22a7e8b5abbfc20b041cccb. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEN421923013.
Matthäus-Passion, BWV 244 / Pt. 2: No. 36, Und der Hohepriester antwortete
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bad05ba55339cb42534be6a0c6c6dc7815e6f2aef5ab19e1c42f48594a12335. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEB111600307.