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 0x04d5279b3c3ed4d38db82d557660e531af31f0a4c279b4cbab818a435993dbbc. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36e6f523-d6f9-493d-b90a-72ec931dfc04.json and https://artists.proofprofile.net/proofs/artist/36e6f523-d6f9-493d-b90a-72ec931dfc04.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
IVe Livre de pièces à une ou trois violes avec basse continue: La Provençale
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 0x3e7fd1d983ac3901d223537d971056f819e9915257db487f50ef915b49d3bb3a. 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/FRZ178100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3ddfcb34720c2bea2db258cbd688109ba9f5f85dd7c06f0481077fa404c93b. 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/FRZ178100390.
Der Getreue Musikmeister - Sonate en Sol majeur: Siziliana
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e260eba5fe3776bd49122361bb7d5bd7601366eb190e6db574da1c698433d2. 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/FRZ178100410.
Sonate o partite ad una o due viole da gamba con il basso continuo Partita XIV: Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c9fa690e074f65e81126fd90539c01d0d57e390470bb50ce0fbe5021437d78. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FRZ178100310.
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
Sonate o partite ad una o due viole da gamba con il basso continuo Partita XIV: Corrente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9f9c52ade25bc8894fef37bcfa2e8bff7738a20a7a701189929f25602a8a83. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRZ178100320.
Sonate o partite ad una o due viole da gamba con il basso continuo Partita XIV: Giga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edc572b89d1ea70b43756b658fda167bcc30822a9e584100148311b1c679151. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/FRZ178100340.
Suite n1 en La majeur du 1er livre de pièces pour une ou deux violes: La Milanaise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7638ff782727bbd08943f5db8890fb3e0ac37af21c78257d30fe4d54ae7c7c73. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/FRZ178100380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c415b5f6cbd2d3f6a6950dbb599c919eeebfbe49b6966080fcbf61bf4361c22. 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/FRZ178100400.
Der Getreue Musikmeister - Sonate en Sol majeur: Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef7de36aa7973bf47efb2be75f4e02824fec1b8499281dfaff17e200b343b59. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/FRZ178100420.
Der Getreue Musikmeister - Sonate en Sol majeur: Scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd9e9cbfa389340fa340d823055726714af21ccebb9731063efeb8b9e935e357. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRZ178100440.
IVe Livre de pièces à une ou trois violes avec basse continue: Feste Champestre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83b0d708f620e9de0d61989288c16581e156cbc7a6028d68c9aeb00305b4dfe. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRZ178100490.
Six Easy Sonatas for the Harpsichord, or for a Viola Da Gamba, Violin or German Flute With a Through Bass Accompaniement: Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96407bcf5d19f24fbd306a33d2a630b96203d69ec3f9c5f7ebe20dfb6429d0f9. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FRZ178100530.
Six Easy Sonatas for the Harpsichord, or for a Viola Da Gamba, Violin or German Flute With a Through Bass Accompaniement: Minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc552b125bad117cd2d7fc85fe82db83f868691ea34e78e85b5c6387adea4f247. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRZ178100550.
Première Leçon, à une voix: "Incipit Lamentatio Hieremiae prophetae"
Couperin: Leçons de ténèbres pour le mercredy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f02af860c8294307489bbc35b29aeaf2b95e115502ca61f923ec08ef84bde83. 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/FRZ147004010.
Première Leçon, à une voix: Aleph: "Quomodo sedet sola"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d146cce8b77eb23ffcf95fb1b3f653780cd32a49ee37ffb9df72115daefe1c0. 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/FRZ147004020.