Karin Ott (born 13 December 1945) is a Swiss operatic coloratura soprano. Born in Wädenswil near Zürich as the daughter of a doctor, as a child she studied piano, violin, then organ, and later attend
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 0x4f3a72e03490fa95055f4c7c3a02f51fa995a6dafaeb8cd25f37fabf3862a566. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d560b22d-1cf1-4b3f-bc5c-59b386fc62a7.json and https://artists.proofprofile.net/proofs/artist/d560b22d-1cf1-4b3f-bc5c-59b386fc62a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Zauberflöte, K. 620, Act I: No. 4, O zittre nicht, mein lieber Sohn!
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 0x86fe2d6ee5c96a497ac9f4887077efd055f1b399f573df68f9322866364d300a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEF058031121.
Die Zauberflöte, K. 620, Act II: No. 14, Der Hölle Rache "Queen of the Night Aria"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e036921d285dc875c7fc08d628dd6830955e34de6610bc67071c25c31414489. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEF058031132.
Clairières dans le ciel (Version for Soprano & Piano): No. 1, Elle était descendue au bas de la prairie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306719279f9fe36e40aee957dfbccd412e9f52d0f1b003f6ec7cf474c4a42656. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1491908701.
Clairières dans le ciel (Version for Soprano & Piano): No. 2, Elle est gravement gaie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc83dad9d941cd1970e3a6b59aafda130c4facc66a7c8243aac356bcaabacf3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1491908702.
Clairières dans le ciel (Version for Soprano & Piano): No. 3, Parfois, je suis triste
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89947fcd9ffd19ac4a52b3a58ada7c50108a07b824d3bc5c2e1b5400c8e73e43. 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/CH1491908703.
Clairières dans le ciel (Version for Soprano & Piano): No. 4, Un Poète disait
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9919beb0a5e58b035df286d19d6e4d0be3e88e97bd9258802dafaba3f7c0358a. 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/CH1491908704.
Clairières dans le ciel (Version for Soprano & Piano): No. 5, Au pied de mon lit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f4d98aed8d7f3b6e13a8925ba2a124393d13c45037e37df4d1f732b73c24c1. 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/CH1491908705.
Clairières dans le ciel (Version for Soprano & Piano): No. 6, Si tout ceci n'est qu'un pauvre rêve
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796ace803a313a2cf2f8f2a4b61ed9edb4d01c25fa67f011b23dbbfcb65de3cb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1491908706.
Clairières dans le ciel (Version for Soprano & Piano): No. 7, Nous nous aimerons tant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68035a9c15be219bf3be5f44cbe74851aa4f664ed2229f26e02cbdd03546cb6d. 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/CH1491908707.
Clairières dans le ciel (Version for Soprano & Piano): No. 8, Vous m'avez regardé avec toute votre âme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7272b1b0015be5f26cec192add37a59054d38e78b6e6deef4646989ed0e94f0e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1491908708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9e1b8c703c4a379176d44ee555a2264b0759ac59ace09c9cf70c398ca0eacb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH1491908716.
Clairières dans le ciel (Version for Soprano & Piano): No. 9, Les lilas qui avaient fleuri
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd098137b81c81786073c2639c02203924616aad7ac99ba04f48dcff728641e8e. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CH1491908709.
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 0x7a5091dcef65f4af170f4daadee1a8d15a6ae35ffa31cc76293cdcfacc38702d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/CH1491908715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe658da86e5c0a07602ce19f83586be46e71c88018b493a1225b84d458f257df0. 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/CH1491908718.