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 0x0765c0d7c22f883f08fa1dc68ccca15905f2f4be60231e7a04189de91c78c854. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad51e86f-ac9a-4e6b-9a4d-f95fd4903a02.json and https://artists.proofprofile.net/proofs/artist/ad51e86f-ac9a-4e6b-9a4d-f95fd4903a02.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
High Definition: Najwyższa Jakość Przekazu Mixtape
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 0xdcc0544d98af9ea8cd126474502545d30c15aea623cf0df8857478ba7d29e479. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLI367075130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a6f3c418d64019365ff07fbc6e73c1979ed29e0e085b6822738232d52561f2. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PLI367075110.
O Nic Nie Proszę (feat. Wujek Samo Zło, Skorup, Julia Postek & Ciech)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e53aae548528e3c29f023b811224b83c4d20c0b3e94a17765fa278def15dac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLC071501013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6be23a5643b40f2b5a57f390935419fd67f6b4f60737bbc08e48a6deef02887. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/PLI367533070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7751e77f1ecdd16cea40fdb4a9a651ea98608267ee858ce1f61b5605ab8cb55. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/PLI367587940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6354165d90306ffe56cbaa631d47e6051d22f79693a658fdcb0124740485230. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/PLH871300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c1074e17fb1ef862bd3ab2be9b6ee658d760f7886c92faf0338e76f95fddcc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLH871300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c0da921873c6f22af1784721ac8613c5db5f4decc1833bdf46999c9fb55f02. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLD111400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc679ae9aed8a30f3edc13131fd221d3d6ee9401c5aeab9dac7e9bf7e2e9d5de2. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/PLD111800056.