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 0xf2de77dd425975839dfc5174df4546e34100b16b61eeef17406f01990dd4de82. 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/999ab53b-68a6-444f-84c8-1119e185c7b0.json and https://artists.proofprofile.net/proofs/artist/999ab53b-68a6-444f-84c8-1119e185c7b0.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 0x7b98430fc1e5fe3f5756fac9a322472c2185355ffc660678fa1c77e5774578ce. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BX4RG2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b98430fc1e5fe3f5756fac9a322472c2185355ffc660678fa1c77e5774578ce. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BX4RG2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1062a75847cadb18a245212e044c89c1849efa59657f3a855a7569c68853c8dd. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BXPOB2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffaab8d6b0feb6a06e6bb8a01ad879b127d5d02c02f72a2f47c3a52e2507e03. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BC0UT2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66561ea5768318e3f9a2c41583f6d5a32db1227cf256dee32ef220a71efac28. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/BXJK02200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da8d0e95692422468b69bb1874f1a9c49d3b4777f85b2f986b109a220e3a26d. 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/BCR6R2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98432acd06f9f72eaa6dd8ecb27ef12df93f4088e51bd3dadbf9d997055926d5. 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/BXWY82400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc673abd86ac603464b35fe2baa47cfb06ee918968f0fc0d3c185405157745bb4. 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/QZGLS2065867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b4f6033a9cbf01f4006ba514c40efefa54fad8153773cd7e6071c2ff5a0b5e. 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/BCMEF2200005.
Maldade das Ruas (feat. Did Brock, Murillo Zenki, Phantom Mob & Caju Clã)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1080c344bfdf7dddac1397fcb3a73fcef586d3aaa18d7370ab864af374ac101d. 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/BCXVW2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95466cd1c180d7eab7fcc92ac00229bf5e411bca77fa1ca62798eeb30f6ea2fd. 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/BXBGP2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202d0a65247e36bd187041adda0454f69d168985b4592a650c5f20b5f4ac99e7. 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/QZW9M2304589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99c00b319836c1a2d73bcd156d4284259e04f34610ba59058876452ed281af6. 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/BRTRB2303226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd25e6f1c51bc1078272399cbc62de70f3efb86100de19815606115ccf7d557. 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/QZGLM2221278.