Peter de Jager (born 1955) is a South African-born Canadian computer engineer, best known for his Y2K early 1990s outcry warning; he is the namesake of the de Jager Year 2000 index, which began tradin
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 0xc452d6ff921d722196142e2632600014e75810e924dc81d782658b921957acf5. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c86d14e7-5a1c-4dcc-8256-15203620c936.json and https://artists.proofprofile.net/proofs/artist/c86d14e7-5a1c-4dcc-8256-15203620c936.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johannes Brahms: Music for Clarinet and Piano
AMEB Trumpet Series 2 Preliminary (Recorded Accompaniment)
AMEB Clarinet Series 3 Preliminary Grade (Piano Accompaniments)
AMEB Clarinet Series 3 Grade 3 (Piano Accompaniments)
AMEB Clarinet Series 3 Grade 2 (Piano Accompaniments)
AMEB Cello Series 2 Preliminary Grade (Piano Accompaniment)
AMEB Cello Series 2 Grade 3 (Piano Accompaniment)
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 0xf389159b7e18c33975b75fdde6a63dc26f04f4d2eb40855128938227dc5e3ad7. 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/AUFFF1700116.
AMEB Cello Series 2 Grade 2 (Piano Accompaniment)
AMEB Cello Series 2 Grade 1 (Piano Accompaniment)
AMEB Clarinet Series 3 Grade 1 (Piano Accompaniment)
AMEB Oboe Series 1 Preliminary Grade (Piano Accompaniments)
AMEB Oboe Series 1 Grade 3 (Piano Accompaniment)
AMEB Oboe Series 1 Grade 2 (Piano Accompaniments)
AMEB Oboe Series 1 Grade 1 (Piano Accompaniments)
AMEB Flute Series 3 Third Grade (Piano Accompaniment)
AMEB Flute Series 3 Second Grade (Piano Accompaniment)
AMEB Flute Series 3 Preliminary Grade (Piano Accompaniment)
AMEB Flute Series 3 First Grade (Piano Accompaniment)
15 études de virtuosité, Op. 72: No. 2 in G Minor, Etude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022abb9b9aae347ae5f09ebd8dba1ef07c9250e1c6c793c869cd1c72e74cd7c9. 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/AUFFF1400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd994af515ba7723f9edb605d5ca9eae5c3639ab0c8e4663410731fda578678. 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/AUFFF1400120.
Mantras And Night Flowers: No. 2, Frangipani
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d369f42c545ab82477c7772f7a7d71dbf849078730b360a22901f409281c8a. 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/AUFFF1400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cf6038d31158926e0eeb16093fa8fce3adf02c78ef8bef49fd16e3da459573. 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/AUFFF1400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f77a8e3f17e9a913195ade1ab6dcb0d7e7623620e55a903b2f5a3bdf7d742a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/AUFFF1400098.
2 rondeaux mignons, Op. 18: No. 1, Rondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa5ae00219ed137c8b82d8b5e692b8d99e6d218ac7979cce531870ef872ced3. 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/AUFFF1400087.
18 études de genre, Op. 109: No. 5, La source
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a20d74fb89c8f25f252314712c9672d0127c6bc16f55d752fec187d766dad3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/AUFFF1400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6040b74371d00b357b95e65828ccc993450ed9d467d2458859ef41f4aae81795. 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/AUFFF1400070.
12 Etüden, Op. 39: No. 12, Alla tarantella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0866a87d66d70ea4ba1eb7a8e786574071415d17be04ac1eb4ff1c25883493d4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/AUFFF1400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3725bc7c68be035966c74d1cee2dd55d581abaf14c622a04952f79608644d1cd. 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/AUFFF1400075.
Northern Lights: Piano Music From Scandinavia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438c15b74529b4e34cb86b6438c48a8ce31ffba1322a04da4700ae50be2f147e. 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/AUFFF1400089.
March of the Women 2024: Connecting Australia, Volume Three
French Romanticism: Piano Music of the 19th Century
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d98734a3a57131b6b08f3478da84cb7a3fbf5c1120ddf78ad4f58e389322a8. 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/AUFFF0500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee037a5f24a2417b1c285ca33a1ed47b7d89a96ddef06a009bada126ef86e990. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/AUFFF1000036.
Noteworthy Women: Piano Music by Female Composers
Piano Music From Hungary: Bartok, Heller, Liszt