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 0xc857f50c2ff7d1660506095607bb84fd6190543c0a26c2e7a816e4431b821204. 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/3bfc1433-cf53-400b-8226-cc93969c355f.json and https://artists.proofprofile.net/proofs/artist/3bfc1433-cf53-400b-8226-cc93969c355f.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 0xf9c3247763303db98ef9522a98480d61ea8c86696b9ea7b5a2b0993aeed5b004. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QM42K2023307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e932eab3ff06732cb5a7f3602d122e369ed736bc971747771c1ee5cb079f53d. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:20:06Z), 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/QM42K1945993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3eb6b43c87c4f476e7202fd1273b4827c6bd742b6619aadc2eaff475641925. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM42K2119735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5225f08d66004d5b01af847272806c1118fa990b4b9f086d41c079fca39c5bae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEPI82212916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb8b03bc3a07b9c5bbac86d95df196176901c9eb760fa98fee3ce221f0ac90f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QMBZ92280214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8739c8be0acb75da34c193cbc0471403daaf3904e11b6d7dd28f6dbf4a0bb67. 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/DEPI82217355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd760c684a9c09541e33cf309726dd9bb8bc42fdcab258ae50df75bf37ba3654. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEPI82300321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77608cdc03ab75f8d73d962fbb5734ecaf6690425a7368f918cebc366847c0ad. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEPI82303726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6760228fe2371960ca6de2b525b7d4431371fa8c1e0e57359e4c1da9adb9648. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEPI82306762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41131515c12b30cbaffb454fb020e312ed1fe24ea2503a28a0ff0c047c08019b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEPI82306749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0024f47867b6a017e7cdc5a26b09b1c218b6f828520a57bc6b7918fd6290fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEPI82311313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d7a32905ba5269ed84aa50635fd8b61212574bd7256b9c5d426e0a4c6d17f5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEPI82312638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0934758541b247c9829b99e1a524d4062b31bd66881e91f91024d3815978d2f9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEPI82402397.
Say It Right (Michael Caspar Techno Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa94cc371694fd16edc5700693be40c9dbb0f61fb8719dc4b5785c66c4f0cd7. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:20:30Z), 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/CHF282400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5679d4b33f7b56df38b7f6f4e3028e42f7d3f66ef1637b844f20e5fd480f9c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEPI82501989.