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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f9d93ff008516a1c1f85183ef76c0a48b12c8dd5ab3506cefe042ee25f4c9f. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97f7b4d5-e98c-4296-832a-bda14975a0e6.json and https://artists.proofprofile.net/proofs/artist/97f7b4d5-e98c-4296-832a-bda14975a0e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piosenki dla dzieci na Dzień Dziecka - Najlepsze piosenki dla dzieci
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dd7155e2a246bf4bc4f7516f9fd4f534807899a0439e5bc90a5b49705b285d. 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/QZTRX2300856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8bdb9c2cf0503fef3259a27794989b831d2425d6f1c2dd97b387f343fbf711. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTRX2300861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8121b27d6c00f47d4daba1ee01a41855a66e240d82f7a52bf6f864e04cdb136f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:33:51Z), 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/QZWDE2304754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1805ef77093aaadb73cf8921ef1f7f75a275b327c82b66b1297accf6947d2d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZTV32424600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3acea125adf1b997d56cbbc09f02e50bf29dd7d48c4e95a76e9b738710c6df0. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZZEB2403427.