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 0x576089a10eb251fe531681a8c8224acd929b9c4ab18ec99ac764c4f5a15d9fec. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad92a043-42f0-4af5-8b38-2b4ce2ad03a4.json and https://artists.proofprofile.net/proofs/artist/ad92a043-42f0-4af5-8b38-2b4ce2ad03a4.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 0x9d19c8372ef56d1a2a4a67d27b06c4094f9001799026823903425fb50fbdc093. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZTBE2539340.
(Wiedz że)... Kiedyś będziesz moja [Early Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49b840ff4ccb3c8b60b09293135054d9e3d1e36c6707d1d915a40bf59a2459a. 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/QZWFK2501163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425f47ea60db718f6bac4402f744c490cc3840aff733b9859f6bd1aa012a8092. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWFV2525323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a9a495cd84159e0545f5ed02b0625f7049d9fa6127fc48c794672ad5647abb. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ762555621.
Song from Those Years (Piosenka z tamtych lat)
Пісня тих років (Piosenka z tamtych lat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a503571e0f1606b50eac4f4893503f9f59a21f5f04cb44053727be38a767fa. 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/QZZ7P2593053.
Kiedy czasem Cię spotykam (Official Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f6cd1734ec4cb9e46ed71bcaaa414e7e4a5cb7852421aa57fd094463a2304f. 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/QT3F82569841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968013b1a6dcb5dc7ac126317b36fef91b189e2ae575185f17c1e56fb05ca258. 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/QT3FC2564837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d47eab81508101ded0f69e07b35bcc40ac0827bd3e8374bb0ab3965ac4be4b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QT6EC2546177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180c149928d0c162a8ea5a8585cc60c9f8b0d930003f4f47a74ceb550606a7ad. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QT6EC2595675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca540ac796c245ed94d0c0cedd5fd10057ae5dd899aa9844ddbe564f7d6a10f8. 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/QT6EG2507275.