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 0xb402098b6587536fdb77b4b238d9342502622ba9a79ec4cfaac0d5c5a4366e63. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f872a297-e377-4d84-a16e-6624bcef5a4e.json and https://artists.proofprofile.net/proofs/artist/f872a297-e377-4d84-a16e-6624bcef5a4e.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 0x51696941058e8a5cf5846786e81d5e42ba402d010cc0859d4624f14a0c7132b7. 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/QZ52D1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2837f4e20ecb34a12532670f0a1713f0c296189d1916eb5dbecb86e456054890. 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/QZ52D1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3337f40680699dac14a95e2b88503fce7a764e3605cdb9271a1bd4eff22016. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCADT1869454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac621954c50eeac7c8cb9d17e4ed4e63cf9b8d22c29fee6a8553b4a572fa518. 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/USUM71815750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f8e2f083856781b430100e88ffd74a65c033b95d63e3774a20f3196f52474b. 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/QMJMT2003168.
On The Double (feat. Dyce Payne & Tony Moxberg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917ef6f60b24e0c0ceeca9271cbb2de3402d817f30c538fe8757d541ccc31f96. 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/USUYG1377769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d7737923036e0ba95dba9c33d953b361b77c20e340383ac5c6f2947f38e470. 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/USUYG1311164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6f2a751937195990a25481d0fd5428b7d60c1fd6f8b39d8174f9e2dac85dae. 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/USA2P1828441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97541a4d66d06e0a1372ebb52b848e901131755d010777850008d45f2892b090. 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/USA2P1828454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec8236888a72a1d1d64ecba1c43651adc94cd2ef543ab4aad79154de0701511. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USA2P1828444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd90166138a2d241f8a5d58857ad110ac2e9f117f1400e8bf664b13f3b28cdf6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA2P1828442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde50c7fbfd02261e1e498e923b91770a46726556555567d53d6d1a69e11ad134. 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/USUYG1145196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a67db44efce383e2d52e8feb6bdffcdbc931d570db3483b34aad06d33f6f30. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USQY51539100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca9b9a6de688ebf90fb02d7038b2557608f6f1690f480ea1d492bafd68f06ad. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USQY51539105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728522dbd126729817e8114a57055f85dc1590d6e209120327969bad4124a6b6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/ESA011766504.