Aafje Heynis (2 May 1924 – 16 December 2015) was a Dutch contralto. In 1961, she was awarded the Harriet Cohen International Music Award. A tea rose, hybridised by Buisman 1964, was named after her. S
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 0x175eb2ac6b0a1d156b8a54b80978bdbd15f95eac12a4b7ebe9ab58be6248a73d. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b328442a-8d82-4183-a047-655c077ebd72.json and https://artists.proofprofile.net/proofs/artist/b328442a-8d82-4183-a047-655c077ebd72.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Es ist euch gut, dass ich hingehe, BWV 108: V. Aria. Was mein Herz von dir begehrt
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 0x561f7d3d7688927af0518104428a5972beb87d41095f5eb76e23af76ed573600. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506000035 — a six-check JSON result.
Bach, Handel: Airs sacrés (Stereo Version)
Bach, Handel: Airs sacrés (Mono Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e211ccb045ac96f753c03fd667f675de326903ac44a47a4dd80131d461dca5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA241701412 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f71febcdf489ad568eaea05fcfe28168b4bd0cea5abb7cab07c0b22ca0165ff. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLE070400108 — a six-check JSON result.
Bach: Cantatas 169, 170 & Seven Sacred Songs
Aafje Heynis - Complete Philips Recordings
Cantata, ‘Vernügte Ruh, beliebte Seelenlust’, BWV 170: 1. Aria: Vergnügte Ruh', beleibte Seelenlust
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdca134adfc820a29a2020a8ffeeec0e51708e3eac96c5b77e8e6e65c8b6d4d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLA506000027 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f71febcdf489ad568eaea05fcfe28168b4bd0cea5abb7cab07c0b22ca0165ff. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLE070400108 — a six-check JSON result.
"Frondi tenere e belle" - "Ombra mai fù" [Serse - Act 1]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889ad6b636c0d214b4122ec36d5344686a7e994c0fbe0fcc31944db4768849f8. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/NLE070400109 — a six-check JSON result.
Cantata, ‘Vernügte Ruh, beliebte Seelenlust’, BWV 170: 2. Rec.: Die Welt, das Sündenhaus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35484ad9c1be29b3de5e9266e8054e510402187dfd83d10c158b658251819bd. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/NLA506000028 — a six-check JSON result.
Ave Maria (arr. from Bach's Prelude No.1 BWV 846)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bff9deaa124cbb6fc91eac1262b72f5e98685fdd26fdaf7e58b8dd1e24ac65d. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/NLE070400107 — a six-check JSON result.
Aria: Bist du bei mir, BWV 508 (Arr. for Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5648d497f91d7f88bfe9db29b616481651a5ea3356451116fbe2af363d9e01ce. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLE070400105 — a six-check JSON result.
Cantata, ‘Vernügte Ruh, beliebte Seelenlust’, BWV 170: 3. Aria: Wie jammern mich doch die verkehrten Herzen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e324f15658d9922d4cbe5c035af72c7dca66dd44472f236fc76e5ef83209eb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506000029 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0045b360b439c4adfc029a8438b313179cc807ddf71cb5427a657f3769cdfaf. 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/NLUM70700462 — a six-check JSON result.
Mass in B Minor, BWV 232 / Agnus Dei: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894a1101a2b3bfcf505e2c848f9c353c318707afc6566448bc9753bef2c27f98. 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/NLA506100013 — a six-check JSON result.
Messiah, HWV 56 / Pt. 2: No. 23: He was despised
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ea2a32910216087572373be7bea9f295a3f3b5b8dcc8efe1095febe99118f6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506100014 — a six-check JSON result.
Cantata, ‘Vernügte Ruh, beliebte Seelenlust’, BWV 170: 4. Rec.: Wer sollte sich demnach wohl hier
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c26d34bdb8a6426634c1a1ff4b4d33ade81937c45f74be51cea3d6ddb973bac. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506000030 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91344216ca9ed4376e542e60383ef644674698cba5b2c210a461c74c3b9e410b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/NLE070400106 — a six-check JSON result.
Cantata, ‘Vernügte Ruh, beliebte Seelenlust’, BWV 170: 5. Aria: Mir ekelt mehr zu leben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491e62a267e3d27eb8160087541a4f553c7b15df46caf7ba157cb9dbe38424f3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506000031 — a six-check JSON result.
St. Matthew Passion, BWV 244 / Part Two: No. 39: Erbarme dich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f85dde95b69d8123ad706ae5b6f738eacf1c6eb7d163d67d9bd986f17b42ee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLA506100010 — a six-check JSON result.
Johannes-Passion, BWV 245 / Part Two: No. 30: Es ist vollbracht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2cee5029ffe6533a8054b8fad41f8be459b6e21f35f90f609c9d793f42fed9. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NLA506100012 — a six-check JSON result.
Es ist euch gut, dass ich hingehe, Cantata BWV 108: No. 5: Was mein Herz von dir begehrt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561f7d3d7688927af0518104428a5972beb87d41095f5eb76e23af76ed573600. 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/NLA506000035 — a six-check JSON result.
Cantata No.34 "O ewiges Feuer, O Ursprung der Liebe", BWV34: 3. Aria: "Wohl euch, ihr auserwählten Seelen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad5ebf02c0cc0fddad462c2e0e3b55bfb2139bf567ba6c1cdfd23e4452d4015. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506000414 — a six-check JSON result.
Cantata ‘Gott soll allein mein Herze haben’, BWV 169: 1. Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x424138b1acfb7f7dd1df381908500f52d5637bc2cf30c867bdaf0671d155b6c8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA505900022 — a six-check JSON result.
Cantata ‘Gott soll allein mein Herze haben’, BWV 169: 2. Arioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748d74e74a7b7e173931636c4a061f306ee42a5defdb125c47e461e70bd8bd7e. 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/NLA505900023 — a six-check JSON result.
Aafje Heynis Sings Brahms, Handel and Bach
Songs with Organ; Brahms: Vier ernste Gesänge
Symphony No. 2 in C Minor "Resurrection": 5e. "O glaube, mein Herz, o glaube" (Etwas bewegter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec10f489ad80e70bef23f759169a2b5a9f696dd8569dcbbefa3048b8caa78063. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA506800073 — a six-check JSON result.