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 0xa88d4a272b729090ba476ebca30d85135473da27ad653d17f2acb8716a747ba5. 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/d90af70a-1116-46e1-bc2d-891ba3e0ad6e.json and https://artists.proofprofile.net/proofs/artist/d90af70a-1116-46e1-bc2d-891ba3e0ad6e.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 0xc464e28136a35db8522db0e2f904c33dcb245c1fd48064830b7dd213b046dda6. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/HUA630400101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46a68cfd50f1e46cc1c2248f003ae16bed3f6f4d636c59e918a49517b5fb6db. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/HUA630400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e296e72729347effa60ed671e407046014ecbe41640b1c7a163537ab0a477ca. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/HUA630400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1639482151f64ecb67854e7df58249e910dde1dea22ce1bb42df0313c0c6eb5. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/HUA630400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48e604f91984eac2930e41831d7e4780f51a3f4441601bb3ac841e41f0ac599. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/HUA630700167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e1031e3e86ae44216325e4c8257a247a430fb051d20c49233a69f58141cb3b. 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/HUA631000519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2803a6c7c246edf95e128e459587a883e8a9d0b22c75a6fad4d32f6737b207d. Chain 2 (Bitcoin): anchored in block 957796 (2026-07-13T03:24:42Z), 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/HUA631000520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a36d2c06d0a67b9eb90043aa56635758a88dea8a0f3af97ede34530d9d69a6. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/HUA631000524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aed34eebc37840e08904d557a14ce2413e923c87232c914b976ca92b2f4ebe. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:41Z), 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/HUA631300205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19c74de026060c919b971855388bc4ee86def383e1d90d6e4a8da73d98a09a2. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/HUA631300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe230c3d0fd2416949376db49657f4401306afaff4ed9ced978e71b411d499680. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/HUA631300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59250bb15e667708d1e8782d5b45ab2e227988a75515004a7e58435302613d0f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/HUA1D2013220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57de03cb532fa0711038bce5b01cfc71d1457c02aaa5f13ea36f3f6a2c0a2a3d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/HUA1D2013221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a8e324ed92a4fcd659cbb4bea75b43a66f7a8ae13d473b5b6ef6cd23b51d54. 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/HUA1D2013218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a22f1338cc07f01a4940aac3ba4857aa341d2c431f65291acfda23367149f8c. 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/HUA1D2013225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30baf12aee9656975753a512ecf1b44505feec350331a53fc69ef80d7920c24f. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:20:18Z), 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/HUA1D2013217.
Tiéd, övé, miénk (A legjobb Rómeó Vérzik dalok felvidéki zenekarok előadásában)