thumb|upright|Otto Nicolai in 1842 Carl Otto Ehrenfried Nicolai (9 June 1810 – 11 May 1849) was a German composer, conductor, and one of the founders of the Vienna Philharmonic. Nicolai is best known
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 0x4fc5c4d050014b574df3084acde2e4afcf7a20f07fdc49d4cae2fdb18c748341. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9c7031d-9486-4316-92a4-cf147b20708b.json and https://artists.proofprofile.net/proofs/artist/f9c7031d-9486-4316-92a4-cf147b20708b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nicolai: Die lustigen Weiber von Windsor
Excerpts From The Merry Wives Of Windsor
Antique Brasses: Original Brass Music on Period Instruments
Nicolai, O.: Merry Wives of Windsor (The) [Opera]
The Merry Wives of Windsor and Other Favourite Overtures
Otto Nicolai: Die lustigen Weiber von Windsor (The Merry Wives of Windsor) [Recorded 1958]
Alexander Kipnis Lebendige Vergangenheit
Nicolai: Mass No. 1 in D Major; Liturgie No. 2
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 0x5899f65ab290c99c22bab791c70eb78e4f822893fdbc1a2251b7864241c6e0be. 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/DEB111301103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6233a16c4d0498fcff5030d8f8ffbd9132dae555035b63f61036d8ae7105fbfa. 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/DEB111301104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2e58371894b0efda6dabb65ba937abc225d3a45543a3c4b4bdd99fc6519340. 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/DEB111301105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201029d436c28ac37765d778a7f1fabbb7942440cb87089c59d6b3ae5b50508f. 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/DEB111301106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf546535a1ca3d0aa738cef2e106ab1ee78e8df23801cb076757cfb2a8d5ec191. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/DEB111301101.
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 0x51d2b5f65601cd132b13a1cea2fcdeb6d3651e20562e7fb5f0249194381fbd50. 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/DEB111301102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e51a509028421be880c7d3c697cdc84cd01af909e7608aa9fcc5ea3ef64a00f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEB111301107.
CD85: Natural Horn Music by Otto Nicolai - Six Duets for Two Horns
Nicolai: Die lustigen Weiber von Windsor (The Merry Wives of Windsor)
Nicolai: Die lustigen Weiber von Windsor (Sung in Russian)
Otto Nicolai: Herr, auf dich traue ich. Psalmen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd483ad396f1d93986602ef7c55e365c6be5a8d75e7823b459c7dae2ef8a47d. 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/DEB111202406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd5ca1ce17995f8fd4546ec3893351cac3327c2a8ea0888e9d4876993b91e0f. 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/DEB111202408.
Herr, ich habe lieb die Stätte deines Hauses
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2314436855ace3f92547174a99391a1641646f0406cde7efbc5439dfc65de96. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEB111202404.
Nicolai, O.: Lustigen Weiber Von Windsor (Die) [Opera]
Otto Nicolai: Michael Raucheisen Vol. 59 & 60
Nicolai: Die lustigen Weiber von Windsor · Oper in 3 Akten
Die lustigen Weiber von Windsor · Oper in 3 Akten (1988 Remaster), Dritter Akt: Nr. 12 - Chor: O süßer Mond (Chor)
Gottlob Frick/Fritz Wunderlich/Ruth-Margret Pütz/Kieth Engen/Friedrich Lenz /Gisela Litz/Edith Mathis/Ernst Gutstein/Carl Hoppe/Chor der Bayerischen Staatsoper München/Bayerisches Staatsorche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f6aadb9c331b4b937f25cec9c278235a4bfef40fa7a07c236f1517ce8ec151. 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/DEC628700506.
Die lustigen Weiber von Windsor · Oper in 3 Akten (1988 Remaster): Ouvertüre (Orchester)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda50c8da53a5b52b058743eab22a2730439b674cfcda305099f57aa2e24dfd45. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEC628700482.
Die lustigen Weiber von Windsor · Oper in 3 Akten (1988 Remaster), Zweiter Akt: Nr. 7b - Romanze: Horch, die Lerche singt im Hain (Fenton - Spärlich - Cajus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cd48898ed01579e79666bcbbde117f84b35cd5199a2376053ae85ee50a353e. 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/DEC628700496.
Nicolai: Die lustigen Weiber von Windsor (Highlights)
Otto Nicolai: Lustigen Weiber von Windsor