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 0x7b6a321a5ba7ab928cdfdd34509c7508e05a9eda249d5b483c3ae9bf56ba7387. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e633e42-adb1-41a4-b245-556c9e71c0ff.json and https://artists.proofprofile.net/proofs/artist/8e633e42-adb1-41a4-b245-556c9e71c0ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Djurdjevdan (Deep House Remake) [feat. Margo]
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 0x14dea3f9176404aea12394f8cb498a3707aeebf5ca3372248750748e18700a67. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QMDA62332134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025547b1c1176db0ccb1ce5a32a66c7864535c8c31f36c61f6ff50567e2302fa. 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/QMDA62332136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d8c7a7395356004bc24bbdebd3b209f3bd9a74accbcd6eb6470987c2c42971. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-05T11:01:08Z), 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/SE4MF2300576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d8c7a7395356004bc24bbdebd3b209f3bd9a74accbcd6eb6470987c2c42971. 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/SE4MF2300576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68de0e1df36ffc48ce731e8b3ab25478c06afdedf9ff6618d65c0fb1454eedc5. 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/US83Z2342003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0ebda7ed55bdaa0bf58ddd946d3019741e9e60a724f9393ec21f112c9b1882. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US83Z2342004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b5fe321fba810db425db3b619b382be5f825dae78f8536df344435899bd15c. 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/US83Z2137261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9932fd7a6262b894ec2a92504194645ea516d7efa297cd23e4b4a385eb8eee. 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/US83Z2143550.
Oriental Touch 5 (Compiled by Billy Esteban)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a55c19e21612cc83cd32cb75d56223da2ffc70296d3de7e0d4b070a57af5ffa. 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/SE4MF2300592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d8c7a7395356004bc24bbdebd3b209f3bd9a74accbcd6eb6470987c2c42971. 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/SE4MF2300576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9406226cded90890424c2efab1a2bff394fa1ff7811574f3b3b26913c6cf7f80. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE4MF2300575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb75441715909eaff4539d5885e1d68bbbdfc7a74c391fd0cc46177f126a4223. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE4MF2200374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68de0e1df36ffc48ce731e8b3ab25478c06afdedf9ff6618d65c0fb1454eedc5. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US83Z2342003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0ebda7ed55bdaa0bf58ddd946d3019741e9e60a724f9393ec21f112c9b1882. 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/US83Z2342004.