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 0x5c93743de669727954c289e81b4ff061424315a19103209e21bbe12afa07c9a4. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7764238-610c-497f-bd5e-36845e49a54e.json and https://artists.proofprofile.net/proofs/artist/d7764238-610c-497f-bd5e-36845e49a54e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vivaldi, A.: 4 Seasons (The) / Piazzolla, A.: Las 4 Estaciones Portenas
Schubert: Streichquartett No. 14 "Der Tod und das Mädchen" & Shostakovich: Kammersinfonie, Op. 110a (Live Recording)
Organ Concerto in A Major, Op. 7 No. 2, HWV 307 (Arr. for Piano & Orchestra): II. A tempo ordinario
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 0xd31637f689b9eaef305d0dc90eb045f24d7ef0f96aca2319d7a252e949d2a008. 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/DEB201485507.
Organ Concerto in B-Flat Major, Op. 7 No. 3, HWV 308 (Arr. for Piano & Orchestra): IV. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47cc7415a88ac0f79415297355603886ced8e120cfd636cca45eec8ded1ef72. 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/DEB201485513.
Organ Concerto in D Minor, Op. 7 No. 4, HWV 309 (Arr. for Piano & Orchestra): I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef2bae4ed0f541cb489bf2674c2ae6c95b2c52b5849d4cfe16c2d23d2b40930. 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/DEB201485514.
Organ Concerto in G Minor, Op. 7 No. 5, HWV 310 (Arr. for Piano & Orchestra): III. Andante larghetto e staccato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9671e0f2803c34aa25b49a5baf9de03290fb836d797dba1e9ec2fe4f7f33f34e. 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/DEB201485519.
Organ Concerto in G Minor, Op. 7 No. 5, HWV 310 (Arr. for Piano & Orchestra): VI. Gavotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1490ad16757d2cbc5090ae8297aa3e53e42a8bc3036102be660df100b27be11d. 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/DEB201485522.
Organ Concerto in B-Flat Major, Op. 7 No. 6, HWV 311 (Arr. for Piano & Orchestra): I. Pomposo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa009743ae61bf962f5105e03a56b6be0a8e7f2790e158ddf9b499fd55768aa2. 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/DEB201485523.
Organ Concerto in B-Flat Major, Op. 7 No. 1, HWV 306 (Arr. for Piano & Orchestra): I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa15c51d2f189dd7a05c663c6930a771b7f031230fdf3e0ea848563c144c33b16. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEB201485501.
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
Organ Concerto in B-Flat Major, Op. 7 No. 1, HWV 306 (Arr. for Piano & Orchestra): II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1056631705de9984d1dc839b0bed0d2b591e7a1faf4fb01fcf9b552d7031b2e. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEB201485502.
Organ Concerto in B-Flat Major, Op. 7 No. 1, HWV 306 (Arr. for Piano & Orchestra): III. Fuga: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83089fdad64804dd768323c00862c9538b9c5c391aae761f1740c2274a2f943e. 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/DEB201485503.
Organ Concerto in B-Flat Major, Op. 7 No. 1, HWV 306 (Arr. for Piano & Orchestra): V. Bourree: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d79df9b82c1d2b62dd93ac1e7bb6573ffaf294cbee9e26be5e04a341f74a6a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEB201485505.
Organ Concerto in A Major, Op. 7 No. 2, HWV 307 (Arr. for Piano & Orchestra): I. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f41e264c9081688d17d3808409364cb86ed9df1d6e747d83e12dfe6f509e9a. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEB201485506.
Organ Concerto in A Major, Op. 7 No. 2, HWV 307 (Arr. for Piano & Orchestra): IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc839496cd6537ec1e38a48beeaaf64c3159a8d228f8343d9ae5c831800be77. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEB201485509.
Organ Concerto in B-Flat Major, Op. 7 No. 3, HWV 308 (Arr. for Piano & Orchestra): III. Spiritoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c124c8435417d694530a0ec7c66439d393dce1a41c63d7cc4a87fdf003a4e2. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEB201485512.
Organ Concerto in D Minor, Op. 7 No. 4, HWV 309 (Arr. for Piano & Orchestra): II. Allegro cosi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeda57e8de1da8df42cc6d0fad2c2995c92cd2cc312715252627fb54101f00b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEB201485515.
Organ Concerto in D Minor, Op. 7 No. 4, HWV 309 (Arr. for Piano & Orchestra): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2abefbb8a164b72dc7bd60b845a79b0f4216abc79dbf491720f5a8e6f8ed3f8. 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/DEB201485516.
Organ Concerto in G Minor, Op. 7 No. 5, HWV 310 (Arr. for Piano & Orchestra): V. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2fb9997bb70ccc302f202fa27b113a7b5a4e98f14fa6213149c8b65dabe95a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEB201485521.
Organ Concerto in B-Flat Major, Op. 7 No. 6, HWV 311 (Arr. for Piano & Orchestra): II. Air: A tempo ordinario
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0349a46cd27a54311ed64b99f6257bbecc35d3411ce2229ae262e64af053041. 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/DEB201485524.