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 0xf3ffe079d05c22bbebc6c9e79b97a5f83616065ab9d4c244562139abe4a07a6e. 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/ef980d1b-08fa-4e71-81b0-8df445b49f21.json and https://artists.proofprofile.net/proofs/artist/ef980d1b-08fa-4e71-81b0-8df445b49f21.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Schnüffelnasen [3 tierische Abenteuer (gekürzt)]
Echte Schnüffelnasen geben niemals auf (Gekürzte Lesung)
Löwen mögen schöne Zöpfe (Das Laute-Hörbuch zum Mitmachen)
Dr. Brumm feiert Weihnachten / Dr. Brumm versteht das nicht (Dr. Brumm)
Dr. Brumm feiert Weihnachten - Kapitel 13.2 & Dr. Brumm versteht das nicht - Kapitel 1 & Dr. Brumm versteht das nicht - Kapitel 2.1 - Dr. Brumm feiert Weihnachten / Dr. Brumm versteht das nicht (Dr. Brumm)
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 0x59abf1ae3d679a44e8c08e51bccdaaa2163f8e08581b5fd710046913b85db0c4. 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/DEWM51186465.
Dr. Brumm versteht das nicht - Kapitel 2.2 & Dr. Brumm versteht das nicht - Kapitel 3 & Dr. Brumm versteht das nicht - Kapitel 4 & Dr. Brumm versteht das nicht - Kapitel 5.1 - Dr. Brumm feiert Weihnachten / Dr. Brumm versteht das nicht (Dr. Brumm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18371e7c5228ec89f2cede51ebe993d820e5902fa7258d4e8e2f409063b0e0d1. 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/DEWM51186466.
Dr. Brumm versteht das nicht - Kapitel 5.2 & Dr. Brumm versteht das nicht - Kapitel 6 & Dr. Brumm versteht das nicht - Kapitel 7 & Dr. Brumm versteht das nicht - Kapitel 8 - Dr. Brumm feiert Weihnachten / Dr. Brumm versteht das nicht (Dr. Brumm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8aa5f4b03b3371faa5af75f5c65ac0052c1d47785727112d879b5c3e6e99266. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/DEWM51186467.
Dr. Brumm feiert Weihnachten / Dr. Brumm versteht das nicht
Dr. Brumm feiert Geburtstag / Dr. Brumm auf Hula Hula
Wie Fliegenpilz Henri das Laufen lernte, um einen Baum zu retten
Dr. Brumm baut ein Haus / Anpfiff für Dr. Brumm (Dr. Brumm)
Kapitel 8.2 & Kapitel 9.1 - Dr. Brumm baut ein Haus / Anpfiff für Dr. Brumm (Dr. Brumm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bdbf5378e0aa7b7c9cebb28c0c62f2093f3561f3a77b7f0286c5bbf9c0b052. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEVP82346532.
Kapitel 9.2 & Kapitel 10.1 - Dr. Brumm baut ein Haus / Anpfiff für Dr. Brumm (Dr. Brumm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3eec6c6c7d73eb26cf7936ecd86de60ff64a025868e9c141cfee8b18eaf2a6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DEVP82346533.
Dr. Brumm und die verflixte Gemüsekiste (Dr. Brumm)
Kapitel 02 - Dr. Brumm und die verflixte Gemüsekiste (Dr. Brumm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a65a749b6e2ca1d78acc4bc6940f53d90f39837754b915e31528cd93c890d53. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DE1JR0610076.
Kapitel 03 - Dr. Brumm und die verflixte Gemüsekiste (Dr. Brumm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58e4dd8675fc59e3f26fb4afa9f19d2dc860fea80d58bfb7c4bbe42c36b7b7a. 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/DE1JR0610077.
Kapitel 04 - Dr. Brumm und die verflixte Gemüsekiste (Dr. Brumm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52dcaa0136649b309cc562f8122cb5ff5ce61fd31b1ae45c28fb39a4202e6f5. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T07:36:28Z), 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/DE1JR0610078.
Kapitel 05 - Dr. Brumm und die verflixte Gemüsekiste (Dr. Brumm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68542d0872760a2e30dd75f8992250898c0533f09fc98d18b762d4c41937859e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DE1JR0610079.
Kapitel 07 - Dr. Brumm und die verflixte Gemüsekiste (Dr. Brumm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee551ec03c17ee47a93030d70e3bbe2e1d013ba94b718ffd2aa54d2250a85c8. 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/DE1JR0610081.
Kapitel 08 - Dr. Brumm und die verflixte Gemüsekiste (Dr. Brumm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b116fd19415e02d02de15a9197f284bd001125918df9ae18bc1cbba47f0e4a6. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DE1JR0610082.
Kapitel 09 - Dr. Brumm und die verflixte Gemüsekiste (Dr. Brumm)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7bb7d4762b353106b0c105fd6ca92f6e2f2874b6d9bc392346c0af8c96d07f. Chain 2 (Bitcoin): anchored in block 957539 (2026-07-11T08:09:42Z), 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/DE1JR0610083.