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 0x6332a019b8433c9c299ec5919c057e8e08ff132c4e5070420d14e33153ae9672. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57f500ad-31e3-4b37-bbc4-ec43da2c6989.json and https://artists.proofprofile.net/proofs/artist/57f500ad-31e3-4b37-bbc4-ec43da2c6989.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Geschichte der Mayflower (Unter Segeln in die Freiheit)
Katharina von Bora (An der Seite von Martin Luther)
Johannes Calvin (Ein Leben für die Reformation)
Martin Luther (Aufbruch in die Freiheit)
Dietrich Bonhoeffer (Dein Licht scheint in der Nacht)
Florence Nightingale (Die Lady mit der Lampe)
Franz Eugen Schlachter (Prediger und Bibelübersezter)
Johann Hinrich Wichern (Ein Hoffnungsvater für Kinder)
Friedrich Wilhelm Raiffeisen (Vater der Genossenschaften)
Seite an Seite (Martin Luther & Katharina von Bora)
Das verschwundene Pferd (Englisch lernen mit Leonie)
1 Corrie ten Boom - Kapitel 1 - Frauen des Glaubens
Frauen des Glaubens (Fünf beeindruckende Lebensbilder)
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 0x5fd6e1d0f9e9dbaae6c4febc995d43c57b6cbda780242b22582badcdf0dcb447. 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/DEWI10157098.
2 Corrie ten Boom - Kapitel 2 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01948a31e4230b301cf62806abbd3b27db129b1bb12dc51056caed170bda4281. 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/DEWI10157099.
3 Corrie ten Boom - Kapitel 2 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ebdf3cf10a22dddc7c8de886f90284714b02b9db783dc4cb1f1e199633eee6. 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/DEWI10157100.
4 Corrie ten Boom - Kapitel 3 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348d1c20e5b1fbd7d6f7481837606535a2bfe9d9bd956c0a96fccf8279198d3c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEWI10157101.
5 Corrie ten Boom - Kapitel 3 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44193bc275801611d08f51e117a3431d44b19c827e16a40f354db2984bc7b549. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEWI10157102.
6 Corrie ten Boom - Kapitel 4 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2589b8d6ca9e8ee83e7c3d9f6227b7054e365f0bad08bbfe2bb411f4af0140d. 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/DEWI10157103.
7 Corrie ten Boom - Kapitel 4 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3bc1cf46d5c0b43a1fb6ef8cffadfffb50cd81206837f1593b835ef0682065. 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/DEWI10157104.
8 Corrie ten Boom - Kapitel 5 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270d15a62942eeb88ba98611054f00f89565871bd1524e9dde64fbbbaa49b04b. 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/DEWI10157105.
9 Corrie ten Boom - Kapitel 5 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17d3ca4b1e90e5dcdf22ce24d7651f56573a1bf07e09d61b20ff5f92f2edecf. 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/DEWI10157106.
10 Corrie ten Boom - Kapitel 5 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8fa55518dc157205c0b7b8ba0384400ef3b357b5b2ac16f5c2e9ee8e91d478. 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/DEWI10157107.
11 Corrie ten Boom - Kapitel 6 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e966589e91750782ce62e58d0f0e676c09a93ce3efb8b107bb9b1d41928ebf1. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWI10157108.
12 Corrie ten Boom - Kapitel 7 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ebb86c7eee59f15e197df6b33f16488b1451e7c003a0763014eca48d67333b. 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/DEWI10157109.
13 Corrie ten Boom - Kapitel 8 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9adf9f73f1419836c36d666d1805807462db330eb6ecfc657b748f58b9c7f9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWI10157110.
14 Corrie ten Boom - Kapitel 9 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ba75a62158e98e896abd5ab0969337353098a2e664fc3d49bbb59bd860af42. 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/DEWI10157111.
15 Corrie ten Boom - Kapitel 9 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3553320ccbca96a0f7a09d4dd9d33ec01b8413c7fa2b8d6f63ea92a3ecf0a864. 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/DEWI10157112.
16 Corrie ten Boom - Kapitel 10 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dd4f2baa2e8b74b446748a8252c5433fb6c1f54c5e23183d219652db00d0b0. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEWI10157113.
17 Corrie ten Boom - Kapitel 10 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8dd339a539bd8d868e554fc7693aa709587f5a60b47e2e8bc9839b2de9fc3c. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWI10157114.
18 Corrie ten Boom - Kapitel 11 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65f69163241037a84b8d0e39bb5f3aef8a4c7d2023011f83c134dbf5a3443a6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEWI10157115.
19 Corrie ten Boom - Kapitel 12 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb32fb791b2ad9ecb28f8757bb4fb3323cea90a6a7535b2071bb3d5884c9ee8d. 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/DEWI10157116.
20 Corrie ten Boom - Kapitel 12 - Frauen des Glaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525ae75fdefecc90033fead7ff3392491285d821231121be1cd30cc3dd2a2c6e. 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/DEWI10157117.