Christa Päffgen (; 16 October 1938 – 18 July 1988), known by her stage name Nico, was a German singer, songwriter, actress and model. Nico had roles in films including Federico Fellini's La Dolce Vi
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xe647315c6ecc10c1d03ee08af827dd30503cf69c5bd3115b69856f9a69231ac9. 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/8d150abc-884a-4d63-8893-eeb1288e1ea7.json and https://artists.proofprofile.net/proofs/artist/8d150abc-884a-4d63-8893-eeb1288e1ea7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 → block OTSBitcoinBlock must exist at that height 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 0xb15ed155d29c732e8897f13f7ff04c605fc0d3b33db871cc21a6523899c65745. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELJ82062895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8897e657e55003d220d84af463fa377fb958fc69638a67372f1931726a0ec68. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEKF22200292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d0afb4df85ca64a4676ed302079fb3cddd33cafb803d7aae850db4b9e5abba. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/DE1ED2200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6646615e5d5e0401f610aa5c4fe0e2ac9f13c075dbf607aa6a34708843ddee2e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEKF22200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179360e7c3c0d74e224cbbc20c8987879395c6b1dff916af16530b4289e5ec83. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DE1ED2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa514922f9dc71eab6bdeb33852426870a0e5bf118a748c6423c439868d42b2. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DE1ED2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff52f9bcfde267b1b0b1da45068d737b00e01d7e39847dd2bf2123a26694eba. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEKF22200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e0d7d9c0f9838138f6000bedb876123c0f3787b124c5f579c2ebf00bc10848. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEZC62335138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33dae1fdc17b70f89c63cd84dcbeda2d89bf59a5340ca67d0cd17b22234b88f. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/DEZC62340683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8bb964ca40affa3bdd4881577c464198469ee06ba4c747b42875d27d067c7a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZC62344998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e7da0d401dca01b97076d9c1b455ad0a3887f965bfbf96e38db821bff835e0. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEZC62348689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4becd0fdcf8ab43061820e7a49c1490d835e96899726bf16265e89d754fad49b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZC62417737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7a9d198029718497eabad63ebab70c11a6745bbf650b4fa6ff80ac5c2af80f. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/DEZC62434220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd6a17a4077d97679eedf99ae609333140f9a5ff5ab1851b88e8f38b07e7912. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEZC62441311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78821e23767c7d4e5762c66f0a4054890719d5cc08da9a060cb8aeeff297b4c7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/DEZC62444526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1be60f8e8845428573ed136be605a99993a1880fc25b761700dcadb402883d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEZC62444527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b15dc489edb88d0ca620c03b455841ee8e6cac9c926d2e87ab1d314c997c15b. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DEZC62444528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd6a17a4077d97679eedf99ae609333140f9a5ff5ab1851b88e8f38b07e7912. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZC62441311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2de09a5b9dd746c60680357210f4c4210a8131adb69e3fa60b1d0ef475ce9c0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEZC62437996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3926258388be64f212a43c2f955800b4054777757156ba341dcc99e28f680b2e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEZC62444530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887c83d598bd7a367b42ed886b5ab7056ee9b0e49976289bfcc2b25643ce83f9. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:40:31Z), 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/DEZC62444531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8562d8bb09b67d090ba9f0e754d53ed7b56473e60e0099a63cdf69058e724ea3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:33:14Z), 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/DEZC62444534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87a0926c9cc8a43d96e204fdc280a4bcb81eb9497681a0e4d6e89428ac178bb. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/DEZC62444535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae64ef1b0aa75fd95d5e2b8405997f89e9dffa1596217530271956c3cdae185f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZC62462953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c1b82a171786cec4d77b899d2a8890a983f007aad4b07bdde88ca94ae1358b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEZC62466755.