Leo H. Fischer (September 20, 1897 – October 1970) was an American sports writer, editor and organizer. He also served on the boards of charitable organizations and headed the National Basketball Lea
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 0x43df0e755d0963d715f38ce9c10d0010ce19c8a51aa1b427824758081f8c992b. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30b94360-87e9-4a6e-a5b3-95555843a693.json and https://artists.proofprofile.net/proofs/artist/30b94360-87e9-4a6e-a5b3-95555843a693.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Der Kaffee am Arsch der Welt (Eine Erzählung über den Unsinn pseudophilosophischer Weisheiten)
Kapitel 1 & Kapitel 2 & Kapitel 3.1 - Der Kaffee am Arsch der Welt
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 0xc4964e0458f428dd12c1e4cb3534e34ff7e7552ca6dd56d87474d40cbab3cb56. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM41087564 — a six-check JSON result.
Kapitel 3.2 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ad1659f313912a13093fb43e156456f529039c4dce528ffce5d03a5db76a26. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM41087565 — a six-check JSON result.
Kapitel 3.3 & Kapitel 4.1 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74de6e3601a958bb2d7a7a752938dbe5229ddec08fb0c5779d45d4a0273eca9. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/DEWM41087566 — a six-check JSON result.
Kapitel 4.2 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33088cf37f2bbc0dcd08158812cfc1edba39c20b347f4e8e315e88d2621a5b23. 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/DEWM41087567 — a six-check JSON result.
Kapitel 4.3 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528ef7e0d46ab1e9772b6a548c506a96a43e25ed8b23b5e253cac1f85baad447. 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/DEWM41087568 — a six-check JSON result.
Kapitel 4.4 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c53d872bb8fd7d0c709a16602d652aedc7d0603efffb73dcba78a807c164955. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM41087569 — a six-check JSON result.
Kapitel 4.5 & Kapitel 5.1 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2cdba7c26dd6c58ac952d62f36f57a1baa9110911b725e6fe885707b711291. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEWM41087570 — a six-check JSON result.
Kapitel 5.2 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa7569c1d49bd5a9572b3e81110e04c7f5ebf52806e30e86bb8c383af566c27. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEWM41087571 — a six-check JSON result.
Kapitel 5.3 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a540d452dcff76d6830157f8485ac0b53494c54d0a7f7ab924877f4d63b3442. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DEWM41087572 — a six-check JSON result.
Kapitel 5.4 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5c61ab65134667ba56bb70ad95e18c5e509216ec8f0de1692f33d6f3951065. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/DEWM41087573 — a six-check JSON result.
Kapitel 5.5 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540b3029a82b208acfce912dc6e63cf6a0997133311f5b356221cfab8b639d25. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEWM41087574 — a six-check JSON result.
Kapitel 5.6 & Kapitel 6.1 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96894f229f6d173b868c52a4bdf37b7b5b6a018fc74c2cecba07cb791a25df55. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/DEWM41087575 — a six-check JSON result.
Kapitel 6.2 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe226bba22622187bbd696b0d157a11088e83be8ee37cfa4351d96c81719b22d6. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEWM41087576 — a six-check JSON result.
Kapitel 6.3 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb887b9f26acdb384ce92d81e24a93c99539e25d1dd06b667da77fa127b74bfd4. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/DEWM41087577 — a six-check JSON result.
Kapitel 6.4 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced3a0203dfe0abf757b85af0c2021fa440159b4d298b3ff912ff17668fd9916. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEWM41087578 — a six-check JSON result.
Kapitel 7.3 - Der Kaffee am Arsch der Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12c71e7c69e8f47fb6ac474b315bcdc863da92a78c1e087f4e02614a75398da. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DEWM41087581 — a six-check JSON result.