Katzenjammer may refer to: Katzenjammer (band), a Norwegian pop/folk band Katzenjammer Kabarett, a French rock band The Katzenjammer Kids, an American comic strip Fran Katzenjammer, a fictional c
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 0x5ba61ebab621bac1b679c940b1276db2849d1d015188a44f509da5aabdcb0ff2. 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/f498a663-ff60-471f-854d-050b77f896aa.json and https://artists.proofprofile.net/proofs/artist/f498a663-ff60-471f-854d-050b77f896aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x5bb71c5a5af110cf52c0aa0615049aceb84d37ea6b98e68cc0986feca7f09d5b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOPRR0801010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79405065b64c3b8fe47738d36b492d0e9c80f57dd79c3d4b4e4fb02ef3c8ef11. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/NOPRR0801050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaf694359c131cb54788e0697bbc85ac0ac0f20af2dcc7dbf674cc09302272e. 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/NOPRR0801100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3214643e6117ec023e30544955e2f43fc034d0f297d420961af3792ed4f0c573. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/NOPRR0801020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcea2b7e257b1c157a114390d3e53d56a5be65c530211b46c9cb45acd2aff95. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/NOPRR0801080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eadff665ae83835523c103e2f671c9643579b3aa8ed3acd976758f31390e48f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/NOPRR0801120.
A Kiss Before You Go (Spotify Exclusive Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371b94007bba4268cac662f5d8c17360c72db025c6df6597337aa64fed56906b. Chain 2 (Bitcoin): anchored in block 957726 (2026-07-12T16:04:28Z), 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/NOPRR1102020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3158c5c1a8b3c16d2aa5cd8c572318d8bdefa1e0d254dc792837843c5633a706. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/NOPRR1102070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8f310396484253e27835afd6e2436ae815776d8056e7ccd576a5ed6812bf5b. 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/NOPRR1102090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b48258c28ca41b61bf3f6a1690b5051dc0c7992c5b8e79ce886c6158eb4b99c. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOPRR1204010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4873d506f98ba251314763070563fb495673e5c481aa27841fca1bc4549861d7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOPRR1102060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc565d3ab78e9a852f65990f3f2048c9996815fd6e5e45b33c844d7e95624f21e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NOPRR1409040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5648b182fa1f98ffc537fc3432faa431eca48f7f159f289663c26ec2f9d016. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NOPRR1409030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564f8409ff4bb7224b2c04f287470a043dd347fe9b265561bf111e11024cc4cc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOPRR1409060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca08c735d2620021355498431ae1e0c5cebcc3733468f0faa4c83f460edf828. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOPRR1409070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03001f858c677708f7cb3c75a7163728dc1763b55a3c908d1c78a4b429c5f4cd. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/NOPRR1409080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda499f6e1cbb9e14d120431696f6cd65c50da98171c54efc91d241f662e26a7a. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/NOPRR1409100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99373b8ca8b4f0f55f24b3847eb6c4a24011fc8ef17d11b5967bb5b710f6f96. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOPRR1409110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71f0680f328746301b4f0b2e3f51373e94aa784b290c485722c7847e511cb45. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NOUM71101934.
Vi Har Den Ære - En Hyllest Til Thorbjørn Egner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b455f7d15d4b494a4058072bca85cf452dc2004bf086fb973f728dbdb7d8a74. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOHMA1255010.