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 0xfb85938258a350c0c1850a15fa2602231b336442214637c38aaf8e47a121aa2f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a6af028-d06d-46c8-8850-64b3b8204282.json and https://artists.proofprofile.net/proofs/artist/2a6af028-d06d-46c8-8850-64b3b8204282.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Symphony No. 2 "Resurrection": I. Allegro maestoso. Mit durchaus ernstem und feierlichem Ausdruck
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 0xc0eef8a98133159dff31f631ee23040436540fb9c4162534c9fb854e38781db8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1004401 — a six-check JSON result.
Symphony No. 2 "Resurrection": II. Andante Moderato. Sehr gemächlich. Nie eilen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1964acf1d3e28985a70a0f7d505d065845a47fb766e030d8911589968ef125b. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1004402 — a six-check JSON result.
Symphony No. 2 "Resurrection": III. Scherzo. In ruhig fl iessender Bewegung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c61b585b966c73a17f96cc26115a7a4ce90b87928d541dfb7e48a10a59921a2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1004403 — a six-check JSON result.
Symphony No. 2 "Resurrection": IV. 'Urlicht'. Sehr feierlich, aber schlicht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb482fe2f749aa9b009f4386a60831b4dc28e3b0db114e31c675abfcc733752. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1004404 — a six-check JSON result.
Symphony No. 2 "Resurrection": V. Finale. Im Tempo des Scherzo. Wild herausfahrend
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8627e0b3285a72a012c2462cbb69092743b3228e468343fd225987b8ae973e77. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1004405 — a six-check JSON result.
Symphony No. 2 "Resurrection": V. 'Aufersteh'n.' Langsam Misterioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b03b557503a4ac99151878d5f49b7818b6d61a1375aa2758fa2ee999707a5f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1004406 — a six-check JSON result.
Symphony No. 2 "Resurrection": V. "O Glaube, mein Herz" Etwas bewegter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c0b9b78411a35af7fec4b2adafd7f862f1b9a6c8e575ddab283f5f1151b7d5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1004407 — a six-check JSON result.
The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: Introduzione 1
Haydn: The Seven Last Words of our Saviour on the Cross
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153f6bda6ec822f0b6d268432e037886704014cfb38ab5b11d255e076d08dfb3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1005101 — a six-check JSON result.
The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: I. Vater, vergib ihnen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cff3b3604628a9e445d24a5a257ab1934145d2b0c15a70da9b1b53ba84ff60. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1005102 — a six-check JSON result.
The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: II. Fuerwahr, ich sag' es dir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23d12f212e8ef10f11c30d37f74e389231bae8c30ee5a8df3fd89555cea2dfe. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1005103 — a six-check JSON result.
The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: III. Frau, hier siehen deinen Sohn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bce299975695d41c05d115c05a4e0b3de846a842cbafd7a46cc353abae47f9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1005104 — a six-check JSON result.
The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: IV. Mein Gott! Warum hast du mich verlassen?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af5d3cc88028868410b7e3e9e93e1a653706414c2bb083f0abfbeef4579ca49. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1005105 — a six-check JSON result.
The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: Introduzione 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b668abdb18572c823acd6a22492c8389ff84615a087978b97eb0c19064199f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1005106 — a six-check JSON result.
The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: The Seven Last Words of our Saviour on the Cross, Hob. XX: 2: VII. Vater, in deine Haende
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84f336fc5ac163988c88a0770845d10b18e0eea00f662fecae26cbb64f736fe. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBHZU1005109 — a six-check JSON result.