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 0x9a62c3984f37638ff3f70f79c964cea68c4dca7adc3dab8522595f199de82c2f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69e7f8df-7733-432e-a6a8-ab0af7620cff.json and https://artists.proofprofile.net/proofs/artist/69e7f8df-7733-432e-a6a8-ab0af7620cff.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Overture "A Midsummer Night's Dream", Op. 21, MWV P 3
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 0x45e1c09eaacf3f05cbea4c6dd68834eccc040a493ccfc3683987e33ced9e8c27. 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/GBBBA0500300 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18 / Sinfonia: Con moto maestoso - Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2684ea0c5c6c9fba2e3216c24333ffb2593d9d3c0cb56fd4756d4256f85f9fa2. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBBBA0542001 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18 / Sinfonia: Allegretto un poco agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524bb5689a3ce79df5b20f4958d4a5ffb9289dbe93692dbe0a1cc1536b82449e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBBBA0542002 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18 / Sinfonia: Adagio religioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5ced395019ddd4633c267607a3414f6e3fb7be0ea1c592193ab99001c72438. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/GBBBA0542003 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Alles, was Odem hat"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aba9746eb847d0571f3093af48fd8c61b67738428445f0a4f7e0650ad43029. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBBBA0542004 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Lobe den Herrn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3151e8628e60f6e662d74522cf5ce16f17148184fef8de0fb9476dc2cb051e04. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBBBA0542005 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Saget es, die ihr erlöst seid"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e90480dcd70af6809f1ae3b10570e6fcf6506fefb9cf2fa8f6db463029af61. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBBBA0542006 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Sagt es, die ihr erlöst seid"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5deeed5c4d1179fa99c1098929088f5bc31d9ce054323262d5a60b1398c67244. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBBBA0542007 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Ich harrete des Herrn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966b492ff7403b49776b76185f1f4981e32baeeb6540adc6e6cc48aa5b8af18d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBBA0542008 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Stricke des Todes - Und ich stand auf"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccc29d69894ce922ce69d9681251f032844a4b71136e706ddcc013b23370f3a. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/GBBBA0542009 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Die Nacht ist vergangen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee8c7af1f8c16a0e51154bf3c1c55d453a3f7e850d45a9538d4b0c61587b3b8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542010 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Nun danket alle Gott"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9545f04faa92a52788e69964691e3d9b8508756a4b2d001f3c6c100c6e028f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBBBA0542011 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Drum sing' ich mit meinem Liede"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6f0e23a205c17da8dc7c9564a9ef1b652781c79527745e2908ebab94179a21. 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/GBBBA0542012 — a six-check JSON result.
"Lobgesang" in B Flat Major, Op. 52, MWV A18: "Ihr Völker, bringet her dem Herrn Ehre und Macht!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e3f3b4a782664c4e82d69d91c1052da0739c5e0c9271de18a511597aa4b96a. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542013 — a six-check JSON result.