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 0xbcd7ce47327bdd1a2ab592b3ebf78c7cd5f134be6c3a726eaf64af0806a4fafd. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b3f7549-7eb6-4d4e-83c3-4c630a3098bc.json and https://artists.proofprofile.net/proofs/artist/5b3f7549-7eb6-4d4e-83c3-4c630a3098bc.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Das schlaue Füchslein, JW I/9, Act I: Prelude (Live)
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 0x8dab2848434a2afe5557ca549c9da249ee5cc5105a6ea1667e8d4f94c603267a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEU921998201 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act I: Dostaneme bóřku (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a993a5548ce0937dbca0b116543f47a2c8a2b2a996a668fd4f7709953ee952a. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/DEU921998202 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act I: Proměna (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e99953ec871a7593c5729e4092704a4df08a418dd57164a995c734a5b72bd04. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921998203 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act I: To čučíš, Lapáku? (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874e8219a85748c19c367225f4e23c3d394bdec78863ffc74497603846908f32. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEU921998204 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act I: Ou, ou! (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dbc707e3d344960e766d2015bee94e9c72988caa2fc69f80f781536616870a. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEU921998205 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act I: Mělas dělat podlivá mně (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdc054868c98ce6a636f73432a84e120141ee49981ccca256e9006fe941ead1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU921998206 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act II: Prelude (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853b260c25414cd4e95ac274a189153945e62acb100b6a26e27ea4a454b06105. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU921998207 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act II: Ach! (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad76652ada3dce03172cb2d0ac34b5fb955174fe492bad8187b3543aff8258c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEU921998208 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act II: Proměna (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aa2586b5b1b856825709d6c41985472588f39494e26e456f67a598ef26b9c7. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU921998209 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act II: Ano, ve Stráni bude daleko lépe (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dcd6fe276123a6804e9b7d71f1d6592b4186432ef3a781f4bbc67af581ed14. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEU921998210 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act II: Buďto mám těžiště pohyblivé (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4040b222424dc95072e91b3f14be0bd6b74ff5720ab604d82b0afef779848716. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEU921998211 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act II: Bóžinku, ten je hezké! (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0aea4c12da077001565700ad160fa48edbda8bd493e740e4a8e27b764b0a9d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU921998212 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act II: Zlatohřbítek, lišák s kroužkovými pesíky (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580d4ef8eed1f6a9e06e888d13798b42f73e9f8da4a6c406dd8f274630b759fc. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEU921998213 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act III: Prelude (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac317703775a195c7b87d212fe7056dd8472e6831e47f234bce83715944e989. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU921998214 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act III: Déž sem vandroval, mozeka hrála (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf09f7b96f729969f07d197a92f8f4f459540d524f0e263feae3e3e0d5c51901. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU921998215 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act III: Běží liška k Táboru (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7199129705765241022408cd769c1a8b5091b29bf2ed67b87d286470f3810d82. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU921998216 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act III: Proměna (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64a404cd691c989598bd3378f54742d4cfac1e2ab6c9201fea590d1d8b82297. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEU921998217 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act III: A kde otec Pásek? (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd444ba6e245120ad4e316f256ff5f2ac9a098f3334da55186cfc3355be84318a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEU921998218 — a six-check JSON result.
Das schlaue Füchslein, JW I/9, Act III: Neříkal jsem to? (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fdd425a52cce1796bf4a4db3c942648151f0de5032bf08f0086bb0639240963. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEU921998219 — a six-check JSON result.