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 0xc01d7d9e47a055d85eacb9cce17594a3a5e8a568dc9bb8c61b14cd5b1ed235f9. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ec7fce3-d7b1-4c93-967f-42b7b5c1141b.json and https://artists.proofprofile.net/proofs/artist/3ec7fce3-d7b1-4c93-967f-42b7b5c1141b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johan Helmich Roman – A Musical Portrait
Svenska Massan (Swedish Mass): Ära vare Gud
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 0x0674d8505f8f8e5195af509554201bcd6e353531350cd2fecefaaec1a3fdc8b5. 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/USB8U1042250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6bbce97c97708feda4c440a9ba98f9e7597d8f8c7bec289f41370efa4315c6. 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/USB8U1041670.
Dixit Dominus in G Minor, HWV 232: VIII. De torrente in via bibet
The 35 Most Evil Pieces of Classical Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc13d1d077c98c195a3a8f88c70198f6289600591a3c7e730e14529bbf5427d. 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/SEAED8622070.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: Sinfonia: Grave - Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c46aeca385941ea3686312c9cacb8785bd05bc5db9158a4f9f17460a6edbc3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201010.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: Arioso: Comfort ye my people (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe9e2e09cf4a02b573a0d2f4f6472cbd61c1a9af78bc1e3bcd0cde11819da27. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201020.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: Air: Ev'ry valley shall be exalted (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c640df77ebc9cb2895fa1cf235305a24880707d03827f9ad0e36b22fcce35e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201030.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: And the glory of the Lord shall be revealed (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e500e8731c50d236b50225343cc41b456c911d6ac6d244f68769dc69bf487b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201040.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: Recitative: Thus saith the Lord of Hosts (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a66e61fc148f5bc644d986be03545d15afcfd0e355c3dc21ffb337ecf6056b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201050.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: Air: But who may abide the day of His coming (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffcbd19ddcadb2c34554f0fa86fb284435d60405388a28352531d9595c11824. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201060.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: And He shall purify (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8194705e0b39dac3b67704943f8c8980fc997a403422042d4515481c5cee2de3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201070.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: Recitative: Behold, a virgin shall conceive (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756f72474709853d010b45b09ec99ab77482f9ad9c75ce16ef2d21844d217217. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201080.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: Air: O thou that tellest good tidings to Zion (Alto, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d84587b3ec1e890bd38f00ffa219ba15523028d2e059484edecc193b81fe75. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201090.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: Recitative: For behold, darkness shall cover the earth (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4caea479c2fb9ce2638ee746ec804f0f786a351442fceab11cfdad975e59e9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201100.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: Air: The people that walked in darkness (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa221fccc6484bd4e279529e1ff739c073abb13f055cff9612b79e10ea72dbad2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201110.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: For unto us a child is born (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513d82d0227dbafa5f045e4e304824da2b180cf75d1a63f185b1363858a29fb4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201120.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: Pifa (Pastoral Symphony)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d3e1551b90eaa16ca25e3f4b027247a5c1b4bf5e3736e54f0cee209bca6cd2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201130.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: Recitative: There were shepherds abiding (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501eeae3c9d0b8970e9899c6cc56aebf6d82007615a39f69d79107f1a5714340. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201140.
Messiah, HWV 56 (Arr. A. Ohrwall), Pt. 1: Part I: Glory to God in the highest (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ce676f530ef58c7b27972ac121924db4c8dbf9ed80d59eb6179ca83d3e42ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAC8201150.