The Matadors were a beat band from Prague, Czechoslovakia active between 1965 and 1968, and intermittently between 1991 and 2008. Their most memorable lineup consisted of Otto Bezloja (bass guitar), R
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 0x10f17cc3ea8e633176971eaae5148d554584bd234368c80f35b46d160329ab61. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/512578f2-9d79-468a-a8ff-098ba0b5db32.json and https://artists.proofprofile.net/proofs/artist/512578f2-9d79-468a-a8ff-098ba0b5db32.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 0x8742f52ef241069da9e7d0ca6d6afcf0f87824156d461a550d81380b203df204. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA160405178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fe022c2489a1d592a228e563a7b1e71b27c777143098db0df66475161b887f. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/CZA160405188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33013bcf54d343d55e269c251e58a62d33bd14c5348c72448e9314a1ddb9d7d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA160405193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e434946a405d573ce40d1f136c8876b8fed5a015e9796a0bf714ad9911984e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CZA160300628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9590ecd3aef612bb46d5c670bb58bc73e3ccccf8edd3c3474547ca896fb947. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CZA166600323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4c9472e88d992b3426834cfdfe280f21ed675bfe9b1fc87868cd8f0689d65c. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CZA166700263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40025980b4b480e3adbf80dc0bba3f3f46789c78b3a09cddf96e38273c0fc7fb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA166700264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05dd0d64d32ff45e798455d1b2bd27eec13e12b72b3bbb9d3858611842a4df8. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/CZA166800349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dc86b698f50c80a972de621d5d53c47463fd1f325eab3312b91ec88186b8c0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA166800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea0e93e0b632a4025012f1fe76d28a8570a391735093d959b6c127572f7f9e1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA160405198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4572bb9785424b01cb95603fd0f9b0794c52616966f3fe99f1c88aad30daf596. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CZA160405199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a350378d78afef89ce982f7959f7752429b507aec8c139049164aa7597d15fd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA160405212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81f4e96199aada40be0a8b3ee09006e7ac2a5a1db42f1fe01dee51757f39fa4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CZA160405229.
My Situation (The Complete Matadorerne 1964-1967)
The Matadors Jubilejní Edice (1968/2018)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e434946a405d573ce40d1f136c8876b8fed5a015e9796a0bf714ad9911984e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA160300628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f633d6b413b6622fc7201acdac32290ced4d8807727598876040ac3d39155ff. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560962810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dc86b698f50c80a972de621d5d53c47463fd1f325eab3312b91ec88186b8c0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA166800063.