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 0xe8da14b7ee510ce1ede510620692db9360c36916d2c3bae5a4f1221cf3c30623. 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/69e48bf6-6613-42c8-a2f6-be741427294d.json and https://artists.proofprofile.net/proofs/artist/69e48bf6-6613-42c8-a2f6-be741427294d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piesne Zo Spiša, Abova, Šariša a Zemplína
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 0x3dd36500bf154825c2e9398f3a86737c33364c647e1956859b80d8855da16186. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHU2460996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015202cef4a1c354d6d2be1b8664bce3431a3254e47a261ae1362055249458ec. 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/TCAHU2461036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396d1f943146fc0a7cfd3e0c4f8ead31975fe7b7a2dcab79870700edefa1687e. 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/TCAHU2461041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca030620ed3a82dbb73448f71ed46ca625b2f9e2d058b892d0f9da9b847ae8b7. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAHU2461046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de7375a254f67d01813e23c3afca74ff22794038c7b37066f518b0cbdd5b6fc. 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/TCAHU2461057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968310567768ac0ebea3eddd6587920cb94638c514a5ace09a28edbbe530d586. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAHU2461090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e565e40b25459191b6c89707dc5f4cbe43d5c8a1c08618a836070a4c57c01f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAHY2412563.
Povice Vi Mojej Žeňe - Beťar Ja Parobok - Ucekaj Jaňičku Hore Komaňičku
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e5e97894f06c89e1fad614798adaa340edbfb8af78788c3e6498f2ccf3063d. 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/TCAHY2412593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11154a128a85b14d794d9270763423d4623c4ca90f04ea1bda34d30747aba97f. 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/TCAHW2427832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf80eb7ccfe875d0e9b443d42d920f764456fd08c74b5aac1a22187e286ac020. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/TCAHW2427857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3333c94850cc7af282b3495785a2e0f8acf03faca514de92759450ff0392f344. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAHW2427877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491033fca8b4cddde2acf734f3499e0438b9eb38a9d3cafac67c672fa6eba78a. 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/TCAHW2427882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1253b1ae2652240ce29d281d02e50330324cf4d875635aa6a2ee26983aee2bc. 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/TCAHY2454074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79abf639521db0f7c8b2010b3216e7ac6464203d20a92c5bddd73b185624e0ec. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAHX2494935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ef2add5702dee808fca57c7fcd9ffa666010409f738654f2a58d77734053ee. 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/TCAHX2495057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9415cede212ac011aa23a302d4dc7f5329e8a9731580a3020b4f4691a384034d. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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/TCAHX2495153.