Die Häschenschule or A Day At Bunny School is a 1924 German children's book written by Albert Sixtus and illustrated by Fritz Koch-Gotha.p. 153 Nikolajeva. Maria Aspects and Issues in the History of
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 0x2a93a521ad36aabade06bca7c08658e87a13b6b5b25f75fce8931054bbb22f72. 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/d2b6c712-01ba-48c6-aee2-49337cd3a047.json and https://artists.proofprofile.net/proofs/artist/d2b6c712-01ba-48c6-aee2-49337cd3a047.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Häschenschule - Jagd nach dem goldenen Ei - Das Hörspiel zum Kinofilm
Die Häschenschule - Jagd nach dem goldenen Ei - Track 10.3 & Die Häschenschule - Jagd nach dem goldenen Ei - Track 11.1 - Die Häschenschule - Jagd nach dem goldenen Ei - Das Hörspiel zum Kinofilm
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 0xe22f34c7215ba2c6b7b279d3eaf5fab3209c0d9dca8a3457a9babda94e77d445. Chain 2 (Bitcoin): anchored in block 958045 (2026-07-14T18:53:23Z), 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/DEVP81197649.
Die Häschenschule - Jagd nach dem goldenen Ei - Track 11.2 & Die Häschenschule - Jagd nach dem goldenen Ei - Track 12.1 - Die Häschenschule - Jagd nach dem goldenen Ei - Das Hörspiel zum Kinofilm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0974bdaba8cedd46fb8ba91c1ed6227d3297198adbc21b53449160af2003ba5c. Chain 2 (Bitcoin): anchored in block 958045 (2026-07-14T18:53:23Z), 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/DEVP81197650.
Die Häschenschule - Jagd nach dem goldenen Ei - Track 12.2 & Die Häschenschule - Jagd nach dem goldenen Ei - Track 13.1 - Die Häschenschule - Jagd nach dem goldenen Ei - Das Hörspiel zum Kinofilm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ae101d95ab3e27aa3096c009c980571b3215e80f50c0ac993847f5d1115f7d. Chain 2 (Bitcoin): anchored in block 958045 (2026-07-14T18:53:23Z), 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/DEVP81197651.
Die Häschenschule - Jagd nach dem goldenen Ei - Track 13.2 & Die Häschenschule - Jagd nach dem goldenen Ei - Track 14 & Die Häschenschule - Jagd nach dem goldenen Ei - Track 15.1 - Die Häschenschule - Jagd nach dem goldenen Ei - Das Hörspiel zum Kinofilm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14911ea78e7008b951d76b0e491eac8cda21f3512401d7928f03d4762887560. Chain 2 (Bitcoin): anchored in block 958045 (2026-07-14T18:53:23Z), 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/DEVP81197652.
Die Häschenschule - Jagd nach dem goldenen Ei - Track 15.2 & Die Häschenschule - Jagd nach dem goldenen Ei - Track 16.1 - Die Häschenschule - Jagd nach dem goldenen Ei - Das Hörspiel zum Kinofilm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376ecdf18a79db5fc2a8dacbcae65556dbba412a3836bf7bc45d9125283ca750. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/DEVP81197653.
Die Häschenschule - Jagd nach dem goldenen Ei - Track 16.2 - Die Häschenschule - Jagd nach dem goldenen Ei - Das Hörspiel zum Kinofilm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ce43513da3a55e13678315f520e5110fd71e690be5a254f6cbdbf6480fb7de. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEVP81197654.
Die Häschenschule - Jagd nach dem goldenen Ei - Track 16.3 & Die Häschenschule - Jagd nach dem goldenen Ei - Track 17 & Die Häschenschule - Jagd nach dem goldenen Ei - Track 18.1 - Die Häschenschule - Jagd nach dem goldenen Ei - Das Hörspiel zum Kinofilm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538000585e743e4403cc2b79a2a108d2313c85e953c91f6f491c34d16b8808ab. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DEVP81197655.
Die Häschenschule - Jagd nach dem goldenen Ei - Track 18.2 & Die Häschenschule - Jagd nach dem goldenen Ei - Track 19 & Die Häschenschule - Jagd nach dem goldenen Ei - Track 20.1 - Die Häschenschule - Jagd nach dem goldenen Ei - Das Hörspiel zum Kinofilm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a863e2ea11cabf13492af3c13c0fb04d3385f82de8ff6e9bbce0b2c8b577101. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEVP81197656.
Die Häschenschule - Jagd nach dem goldenen Ei - Track 20.2 & Die Häschenschule - Jagd nach dem goldenen Ei - Track 21 & Die Häschenschule - Jagd nach dem goldenen Ei - Track 22.1 - Die Häschenschule - Jagd nach dem goldenen Ei - Das Hörspiel zum Kinofilm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8e407e5f503eae65569337da060349167e989654b93f3c8f12694dca6c8e5a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/DEVP81197657.
Die Häschenschule - Jagd nach dem goldenen Ei - Track 22.2 - Die Häschenschule - Jagd nach dem goldenen Ei - Das Hörspiel zum Kinofilm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6eb70902f0fd02374831ad78e67215eebe50ee9ec49e27a92284d0c6a43c17c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEVP81197658.
Die Häschenschule - Der große Eierklau - Das Hörspiel zum Film
Kapitel 16: Die Häschenschule - Der große Eierklau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643d15c2e21121b83cf4a805e00b73dbbdaa36ea7be13ebd6b1f33df97c359fb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DED792217315.
Kapitel 17: Die Häschenschule - Der große Eierklau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3777e81b198b176760f5f9d23a7d64d0d4953c20f1b55785ba5c07af43f45a6. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DED792217316.
Kapitel 18: Die Häschenschule - Der große Eierklau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b60a5dfab7a51f6e0b079fa7abbe38ad1a7922b7d0304029709f43523e3d41. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/DED792217317.
Kapitel 19: Die Häschenschule - Der große Eierklau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b018d420ea19e9b22f54bb6348c017836214cafb52edf24ba4eda313809309. 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/DED792217318.
Kapitel 20: Die Häschenschule - Der große Eierklau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d7ea48e030597390f565bb18eefafca1a1da0b121f58f1ed7749bf9b1b2047. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DED792217319.
Kapitel 21: Die Häschenschule - Der große Eierklau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875f2a9bb21e58024ad087f9052e6ddf96c77d5a533d8c2e02bb41ca7fbf9617. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DED792217320.
Kapitel 22: Die Häschenschule - Der große Eierklau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40db8434cc369dcbd0b5ed7610a05b2f2c1f7ed837733ed9b268ff307c3813e. 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/DED792217321.
Kapitel 23: Die Häschenschule - Der große Eierklau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4923e94fc4dc44a1e2a477575267ad51dbc933f4975d9af55ce6da6df83ee07f. 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/DED792217322.
Die Häschenschule - Der grosse Eierklau (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8700232a01e2c738d74f72cc483660d72273b51c7bf9bf0956b2718d538e3ca1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEGR52200006.