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 0x479f35fe093f8889289b61cd479a23923dadaf7ea324acd87713383b8dbc0337. 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/bca99e04-0e9f-4bc6-931e-6d613d4a04f8.json and https://artists.proofprofile.net/proofs/artist/bca99e04-0e9f-4bc6-931e-6d613d4a04f8.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 0xa15d38f69f291a365a88bb462bed46216014e3a8a80e2ca679f7a6e68848293b. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TCACK1595434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b4eba4954ba5778081605661faecb6e40a724b286062d24fbe2e536f417601. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCADY1820756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa772cb985ad35830bac4c088c3ac3b52b7cfd3905317669742057b6e32146147. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCADL1822396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75f5ae0780b0c988ff04b32459c29e528c359cc6365bcaadba5cb6d06e7cd5e. 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/QZDA61812274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791fab6b371ec738702ad9da796a2e52b02f7b9e05d0726cac433151891b4dab. 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/TCAFG2027951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d5f6d634eede006c8b039e9fb0be6462b7ed463ff8bb6e2f0b339a180668e0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZJPM2107200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10192eb694d50ee90d49af9cf723a4680be9b98aa9fd205884cfe180b95ead21. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/QZJPM2107211.
Go Pro (feat. Hollywood Donut & Southside Diddy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e2757028e6ed7db963642fffb8875f27311d4d56d122be50676c08858d171c. 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/TCAGR2246625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58aac4e2ad073e63b60c255ac7109a9ba428f10371ff7479486599195859b120. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USLD91756458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd58bd59365022a3d38858053253785fedb6cbb39c21446ee0d2e76712372b3b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TLVEM2427234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617d56dc1bcb8d7a519a05f033ee4faa91222b6f08114b4a2f2c9b6e6404c718. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT2VB2411822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd469f62cd5cbd875ba835322bc54b1874d5336ed53f27fac366809a4be211f6e. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAKA2502180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74589e1117c8ab8acd8c842b3537429215bb52d38560e86c4a790bc7ca5d67a3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCACJ1562268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d927ffceb8ff537ff121974f1ef9c8ef816cf0c406912769492f9d02aeb6fa5. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/WWL581500007.