Eric Carle (June 25, 1929 – May 23, 2021) was an American author, designer and illustrator of children's books. His picture book The Very Hungry Caterpillar, first published in 1969, has been translat
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 0x457bd628ea7157feeddc8789a1d645236eeb3e453e1ddf32c2b341ccf38a504d. 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/32792a2e-8f5d-47c2-b3e7-1be64c859f92.json and https://artists.proofprofile.net/proofs/artist/32792a2e-8f5d-47c2-b3e7-1be64c859f92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die kleine Raupe Nimmersatt & weitere Geschichten. Mein kleines HörBuch der Ruhe
Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
Kapitel 1 & Kapitel 2.1 - Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
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 0x9fe16a7b312ffa5ad7522a405cbe293b28a18b8fbe52cacfba5050b37ecd664d. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEXQ62260862.
Kapitel 2.2 & Kapitel 3 & Kapitel 4.1 - Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c3de412033975dd8b0f90a60210660aa1598aebde0d4fa3de842e57cbc40ed. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ62260863.
Kapitel 4.2 & Kapitel 5.1 - Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa075ae094a149ce9eeab63cb53ce378f7bef28a49a89ffc57ded3caf0cfceac3. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DEXQ62260864.
Kapitel 5.2 & Kapitel 6.1 - Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781b5cc6daa3ee4db0bb355d55ee7df6d20920601c8862b0734d28b5afc7e849. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ62260865.
Kapitel 6.2 & Kapitel 7 & Kapitel 8.1 - Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc035bf98fdfc35008a9312a5be09bcf5b4a192e5d7c0d420cfe23054fed8ee. 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/DEXQ62260866.
Kapitel 8.2 - Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05c832fe96de3cb3023089c6b26de4febe0baba44d85afdf15ee2dd067e4610. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DEXQ62260867.
Kapitel 8.3 & Kapitel 9 & Kapitel 10.1 - Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f13402d2c9442f2f80dc7f3dcbb33e9bb4e91742e57648b3440f19d76d274b2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ62260868.
Kapitel 10.2 & Kapitel 11 & Kapitel 12.1 - Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c28e43c7388038406f7987a3c0a12850e76f3c7d1fb801115c403dd57f10d94. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/DEXQ62260869.
Kapitel 12.2 - Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecef734b1c45ab58d34d95de1eb7a27898b886df53fa8be5a434622614b701d1. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/DEXQ62260870.
Kapitel 12.3 - Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb1e5146890ed6c31e504037447fc35e2bc07fa3e61b98553e338ca7e6ada16. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/DEXQ62260871.
Kapitel 12.4 & Kapitel 13 & Kapitel 14.1 - Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156390502729eafea797b904cec733ecc0b0e8453d76f589dff9d778e2c2d033. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/DEXQ62260872.
Kapitel 14.2 & Kapitel 15.1 - Schlaf gut! Die kleine Raupe Nimmersatt und weitere Geschichten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047a3eb54b7a879a31dadf4ea9788c877e028612f4b62feb14274b5d13f2eae8. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DEXQ62260873.