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 0xc7a47990d46420af70a0c358de6f1c08011a874afd55ed75487fef6d7bd03673. 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/ed9ed5a6-519b-477c-8331-105ff877756b.json and https://artists.proofprofile.net/proofs/artist/ed9ed5a6-519b-477c-8331-105ff877756b.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 0x4b7adcf46acce3a416a42a030e7a389c0194d36b1658b2fe85701b48ce36aafa. 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/CZA163344887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84359a750cf44603ffae27b0b3e81e5bd2e45e7c5a401bbb2c56e56c132a7c3d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CZA163344888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6f4f841ff4d81388a5227227cbd1813b86d3b5846f1cee6aeaa833b1af1e56. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CZA163344889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554b9418149c75d76f99778bdeec7cfe21a7a17e6762ae11e4128f28495539aa. 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/CZA163344890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb15df453f3ae3119f9267bd21bbe468f1c518a63c3bb935c37c32e4705bc564. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA163344891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24145893a6b8205ed091d5cd987ccd83310e784e0867fb94c6b636cd5903305c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/CZA163344892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8480eb69c3ef2ed2526a4f3306c198e2a3cc848015ef1928f083b7ff510dc48a. 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/CZA163344895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63a7e1b02e7b7d3a7a3132747cdc911ebd958eea4645b15bac00fc9f21e556b. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/CZA163344907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d37cb89771308bfb063610e7e767c6fd55d6848d49984e13a33ba78165de84a. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CZA163344908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf785ef8c6a21725baa243d8316fafd1510d641c9d77249b8a478c6a2e0c3e75. 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/CZA163344914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f283f6b9ab37c93bf7e07dcaf6b5b3ead4a0f677c80ef9c8a978dc1f0f31541. 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/CZA163344922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14df7167fbecd6c6c193edde657bb0cc3101acbf199f9cc12d484baddb6db5a7. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/CZA163344897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8bd1715400109c68fe582a1936ad3f91c92cba029ffae6256c55a0a4b46a29. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA163344898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e11db46e35ae626a91faf974b0c1c64196b5ae6a4f39a37e95142b7d917c4e1. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CZA163344901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcc54d0d72441c059b79404cdf39b62f07153c3e3610b70aacd952a5cd376ea. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CZA163344904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc6eea4c8583b597f2cc450248b9c7f2a9a996596c6b12390b33556037c6520. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA163344906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821278520698ca6150ea15322772f9a5e303fa20ee3d2549fcd1720279150a70. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CZA163344875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628b926e49e9ac9af5eb3888fd8f538ecc93d54bfd149f39721042bda5c9574d. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA163344876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009cb68b13866151feb2473645d8d5fd900d67bcdcbcb1e84aa19c4fb388ac1e. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/CZA163344880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc278f42585141ac14e104f965df0bb5b0713e49ee280ec22e4a742d59631efb7. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/CZA163344884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0417ce96ad84db2abed8741006e882c2f2b3d1a3a7ba4675eefde8989c21ec13. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CZA163354285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726531739e52fda954c204510e2a86e274f8907917597d43d293340669e65ceb. 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/CZA163354288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05c7d408890498333db50a59914ce937155ddb77ac07497168085edeb94f569. 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/CZA163351497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1129cd8f0241b3e9774903256458498465ae1f9ce0ec384249c2b16f7eb84c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CZA163351499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0467edc3e820f67839853de67e3a243edfdff7a2c6d11102376e0ddeba95ab13. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/CZA163351500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb59452bc7c37ea3705a65468a575251f30a975b532b3195614b21fa194bd0c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA163351491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010882ec6f22b1e0bd6aed3a0d7b0711f03299894fceb423264bd9a42a5fc20e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CZA163351494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0cdac509e28af51955e7992f249a919e57b302404112e4f60fb7021420e511. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/CZA163390662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1eef38ff8aec48997c4140bdc0090c30e09182343394126a473a22093eb512e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/CZA163390665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368dd30c2a2364bf53229fd99b4d8ed2e101c4a09d081525a42d194b37c002ba. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CZA163390667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7597bd301f1e3b337851467efa027349cb18e54929aec8c76b98083beae870ed. 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/CZA163390670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb55c525721b7fa64f0df590f43ebbdf605b60c28741bb0557d576174c250a6. 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/CZA163390671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9669a810b91ec625caa061cd019fe3f38a64692f3850158025586177c39873de. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA162252507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3667d157cc2e8ed0c5ffb4e7ed8c3845727127228a4f73275fc6099702fd967. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/CZA162252510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7d25dbfc8bde488c3754a8d48064ad6ba49bb12c4d094400601db7b6170d53. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA162252511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bd1db115a78abd8ec79e6a8edbb9bc7027d699ac127dac51812f96734c6b6c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/CZA162252515.
...Jak za války / Není čas na hrdinství (reedice 2024)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab7b97b028cc771ca78276f4c286afb7fa0733017db5a0b8e4ce721f84f6c0a. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/CZA162453239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bc3d66e389d7c5617f7ec30d3b86a296fb5edb746b8950d8e15e3a7345a3c9. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/CZA162453240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487d7229674032b659870b944880b4a00f83d4245b2b7a7aa297664c7f3af59c. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/CZA162453243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3bb9f35a27a340d6437df19d92767ec9bb293c8fbe9e6c439813aa7507a608. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CZA162453251.