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 0x9d2eaec3f55c87310f3ebbc0416ef2a2abfcf6f0e9960fd670c33c9eaa9b7122. 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/ac15317b-4fc8-4e9b-97b7-c4f8db3baf2d.json and https://artists.proofprofile.net/proofs/artist/ac15317b-4fc8-4e9b-97b7-c4f8db3baf2d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Kapitel 01 - Freche Mädchen: Frag nicht – küss mich
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 0x55e47ae275b68a361d2bca3e733dc95dd354468a51febfb7a3026e3c2aa559a7. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DE1JK1852966 — a six-check JSON result.
Kapitel 02 - Freche Mädchen: Frag nicht – küss mich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e078cc513dbe1e9a0d152d6230e1a05c8e50715d122d5dd2b38dbf6c6c1049. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1JK1852967 — a six-check JSON result.
Kapitel 03 - Freche Mädchen: Frag nicht – küss mich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05e0fd1222d44970e3aa653779e4ecf1be152aee3278fa3e2a4ff65271a6a7b. 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/DE1JK1852968 — a six-check JSON result.
Kapitel 05 - Freche Mädchen: Frag nicht – küss mich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c1a217e7b92f156eed25c9052e95fd0cdaed9791a28cc59b8d2374b497a73e. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/DE1JK1852970 — a six-check JSON result.
Kapitel 06 - Freche Mädchen: Frag nicht – küss mich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd972efab6f86b5334e570234c6ebb8b30aa27928fd3498676fedf3af0c1b0d9e. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/DE1JK1852971 — a six-check JSON result.
Kapitel 07 - Freche Mädchen: Frag nicht – küss mich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5804ceb40b180d78202910374b48dfbe6e884265fdf4fc9ee3d5406b7c0803b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DE1JK1852972 — a six-check JSON result.
Kapitel 11 - Freche Mädchen: Frag nicht – küss mich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8ed2c8bf6154928f3e5cc8b4e27f4396c8afc2b231797ea10bc01cb7853bbe. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DE1JK1852976 — a six-check JSON result.
Kapitel 12 - Freche Mädchen: Frag nicht – küss mich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c89845c8144d4cacb1c0f1db4ead0976f28f65ff11df2f46a2eef2f7177e3c7. 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/DE1JK1852977 — a six-check JSON result.
Kapitel 1.1 - Freche Mädchen: Party, Jubel, 100 Küsse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f92de4e3216c4f47598be688768a70325d95129ad588ec7bb9e605e7265a05c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWM20561140 — a six-check JSON result.
Kapitel 1.2 & Kapitel 2 & Kapitel 3.1 - Freche Mädchen: Party, Jubel, 100 Küsse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899623f27c90fc4b844285c5515b8c68785c7718960975b4c9ca3419bf8664c6. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/DEWM20561141 — a six-check JSON result.
Kapitel 3.2 & Kapitel 4.1 - Freche Mädchen: Party, Jubel, 100 Küsse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b13df2bca8cda97b4adc3b80237cc6784792006347d33c1d0e7f12feb1dc2a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEWM20561142 — a six-check JSON result.
Kapitel 4.3 & Kapitel 5.1 - Freche Mädchen: Party, Jubel, 100 Küsse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1ada8554699073f779eeff3b6208a34ea9d5aa421aa711762beb0a17fb7dd5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DEWM20561144 — a six-check JSON result.
Freche Mädchen: Krippenspiel mit Zuckerkuss
Freche Mädchen: Kein Sommer ohne Poolprinz
Kapitel 03 - Freche Mädchen: Kein Sommer ohne Poolprinz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf4ef86ed59bfd82072df1e778175af0b94421a11806c5233c3416c77c61934. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1JS1971258 — a six-check JSON result.
Kapitel 08 - Freche Mädchen: Kein Sommer ohne Poolprinz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f1d8a80290ca1abf7bf672b22855f54960672ead146142afc80d0d6a860f91. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1JS1971263 — a six-check JSON result.
Kapitel 10 - Freche Mädchen: Kein Sommer ohne Poolprinz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9329804a90221709cf4af542d0f3221b6789ef4028207c50f7a10a5986b582. 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/DE1JS1971265 — a six-check JSON result.
Kapitel 11 - Freche Mädchen: Kein Sommer ohne Poolprinz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37c193c5e659ba67cd0c9786ae612d2a36b43ce19da4172d4ae0095e61c7704. 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/DE1JS1971266 — a six-check JSON result.
Kapitel 14 - Freche Mädchen: Kein Sommer ohne Poolprinz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43749fb351744cd84ead39acfb433da32c1f821dd99fa7add72a4cae8be8e869. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1JS1971269 — a six-check JSON result.
Kapitel 15 - Freche Mädchen: Kein Sommer ohne Poolprinz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0754a419eac05aa424cce69316f34b7a1ea2889141998f4bdea5aaa70b818e. 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/DE1JS1971270 — a six-check JSON result.
Kapitel 16 - Freche Mädchen: Kein Sommer ohne Poolprinz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9846cc209a18daaf9d03cf19c9cbd5cd94bc9a10f903793c262cf6c88439fc72. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DE1JS1971271 — a six-check JSON result.
Kapitel 21 - Freche Mädchen: Kein Sommer ohne Poolprinz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc421a9722c0cecc720b4f9f1332a7181243763f9b8cf9feb9201e55b9b71a0d8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1JS1971276 — a six-check JSON result.
Kapitel 24 - Freche Mädchen: Kein Sommer ohne Poolprinz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2646ed7ab54e5e417396e704015003566ddcf32bb9c6427037cd36a15d1f0e5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1JS1971279 — a six-check JSON result.
Kapitel 25 - Freche Mädchen: Kein Sommer ohne Poolprinz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fe8d6c1c6c6b2f5682380163aaf26594b8f7530ca766b18f9d08f8c6aa0776. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1JS1971280 — a six-check JSON result.