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 0xe283814fdf0ca82dc769be6eeb28c4a1cb04426d9da72aa8038d832d048ab7a7. 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/c7cc8274-663c-4edf-a668-9804b1f9342a.json and https://artists.proofprofile.net/proofs/artist/c7cc8274-663c-4edf-a668-9804b1f9342a.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 0x564277ce9b3f5b71413a31ae661858493504e4c30078258fef768ca8e9b5088a. 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/TCAHR2328914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40946291821cb805a7e80fa4a883cfe168306e21226445d47effd6196fd5360. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAIB2462802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f17e75d867f6af02c1961b745d3e62f556eed01e4c4825f411f528e123947a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAJE2596070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc311ee7e0e792fd6cb4650bcc6d17b8682ff937920bc0e8a5299273157f26c6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJO2509280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a6b5f43ecdcb8469bab80b49ec99a6a8757c907de2414524926e04ef7ff9ea. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT65Z2591282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c11272cfa8417d5783ace2d43b37a82906f897abbd337de757edd82368e042. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT65Z2591284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0853c3262071e5c9ce433a917d2d71a544f385a35c2e598d5a09296916d5b1d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QT65Z2591285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61da24ea7184c83e3f156393ff87ae783fd9813b633f83a50bd8420e8d2b8ada. 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/QT65Z2591286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555f9154cf88f17e45778a082cab6776d4b337849ddb62b4351bb48c1a73b6f6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QT65Z2591287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24707e69cea8a9a785f94dfab7afb37fce11b2abf75c81d581f5a23a9135178. 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/QT65Z2591288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842946bd4e0fd931288175155b8592357dc1bfcd4c267d9923dc3847464514e6. 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/QT65Z2591289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6dcbfdf8c034768998467021339af5ee28dcf5540c00f0298f75db76b0d7bf. 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/QT65Z2591290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23c03f39d4f7f6f9dc4494d0a5423821273037478ace97a660ca74a9149816d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT65Z2591291.
Strýček Donald farmu měl - Akustická Verze
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c39daf16314c30a10849284c68d1df444788bfaf6516437e4ca98392ac1b8c3. 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/QT65Z2591292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab74acdee8d73b627ccbf2514173a25dcb057eebdf73fa7ff91a6f5a53a5735. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT65Z2591293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6576f28999b95a0e49a05bf62e7a4961c9acfdb75fa2ce3ec47f410d0ed4fe77. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QT65Z2591294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68eb8597a278bb035d18db9ff15d9dc6eddada20a828ade8097ce29020468dcb. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT65Z2591295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f1f54b7b64a0b202bde7f9581621ce50fb6b764e9090306a54143e2ddda380. 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/QT65Z2591296.