Peter Seiffert (4 January 1954 – 14 April 2025) was a German tenor. He was based at the Deutsche Oper Berlin from 1980. Götz Friedrich in Berlin and Wolfgang Sawallisch at the Bavarian State Opera sup
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 0x83195eaef065835a7d431e6f1c289b780178cfe41be4d01810ba55a9d7012070. 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/1a8839f3-2940-472d-8b33-c06d6f027f3d.json and https://artists.proofprofile.net/proofs/artist/1a8839f3-2940-472d-8b33-c06d6f027f3d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0500300.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542001.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542002.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542003.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542004.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542005.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542006.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542007.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542008.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542009.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542010.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542011.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542012.
"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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBA0542013.
Strauss, Johann II: Die Fledermaus, Act 1: "Nein, mit solchen Advokaten" (Eisenstein, Rosalinde, Blind, Adele, Falke)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5c34a9afd6fc7263d5f4e95aab0ba8ce9188c313c70fa152b5c998208371d0. 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/GBAYC8600729.
Strauss, Johann II: Die Fledermaus, Act 1: "Komm mit mir zum Souper" (Falke, Eisenstein, Rosalinde, Adele)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5f5ddc5141bfae66b54bfc43b45c289c8e57a357818a59ebf6e9b79b4e19b5. 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/GBAYC8600730.
Strauss, Johann II: Die Fledermaus, Act 1: "So muss allein ich bleiben" (Rosalinde, Eisenstein, Adele, Alfred)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd008d6e50f5c0d085bdcc5c6ad7e875fbbee9917ef5a592068d9fd84c66301be. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8600731.
Strauss, Johann II: Die Fledermaus, Act 2: "Ein Souper heut uns winkt" (Chor, Adele, Ida, Orlofsky, Falke, Eisenstein)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4d6303a336e8f691b980185bd3350ea49ab08ad0b38adb053f66293101f7d4. 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/GBAYC8600734.
Strauss, Johann II: Die Fledermaus, Act 2: "Ich lade gern mir Gäste ein" (Orlofsky, Adele, Ida, Falke, Eisenstein)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa96afec3fd0b343c64e8fee81b5920d13baeb02314c4869fcbe070350259901. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8600735.
Strauss, Johann II: Die Fledermaus, Act 2: "Ach, meine Herr'n und Damen" (Orlofsky, Falke, Adele, Eisenstein, Ida, Chor, Ivan, Frank, Rosalinde)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9850ff4ffc9bb4c6648a6f8f20a9a426bcc4d755374d7b55f2ec590916d2ec1. 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/GBAYC8600736.
Strauss, Johann II: Die Fledermaus, Act 2: Finale. "Im Feuerstrom der Reben" (Orlofsky, Adele, Eisenstein, Chor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b26b0cc9f111d5a51bf089045c0bde1c50c536ccf3331ee4859139d62392e4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAYC8600744.
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral": IV. Presto - "O Freunde, nicht diese Töne!" (Ode to Joy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c131bee11dd43cc7fca9da2516aba237ecb407797b011d304e51a7d7e43986. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAYC8801114.