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 0xedc1f974190233e21500d93ed7364cba47723adbae078eea9708130ce73319b0. 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/930a8b8b-5508-4853-9f96-46b5dc76fda7.json and https://artists.proofprofile.net/proofs/artist/930a8b8b-5508-4853-9f96-46b5dc76fda7.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 0xc30f4a50c6f3c5b20179a33aa282226488ddf5bcce323260d7034f0a4c9c5e0f. 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/NL1PX2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07dac5125fd06a7f9f1cd478cbbf154a2a31f9b904e4f5574855dcb79f72a61a. 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/NL1PX2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d6a7494b7e115c39780d385f678f304ebaa673e07917873440954dec17dae9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/NL1PX2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae2830f8de9a1af4f1e4ff7951d7440d9761bbf29aca68c5d73b2bf5bb56485. 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/NL1PX2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71111e897613d523ccdda1103373eafbac9aa3b8e74eca9928f1e469080020e0. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/NL1PX2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d8718655b8c30a924e5008317cf5010f0a92f89c1b6fb3d41814910387006c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NL1PX2100023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05ad6af3d1321ef9e6421f08d8435159727f8f30706129d74bbea436ba95c3c. 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/NL1PX2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb303be0bc09a03a4a6c1feea8f728b738a8b36bbb43fd7f8aaea70f3c1b9d7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZ5FN2163340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7953f9fb5c2454b20b7026c03dde9ca3fc098d4fd59628d190bce5271447965. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/NL1PX2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36639c25166234b54cb4f7cf2531555f25754c4984c7cd083e7ef38225705965. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/NL1PX2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59023c4db89d8dac8385c9ced9bce0c75858a8f9d583775d5dca270840bb2d35. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NL1PX2100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8975929ef6ff1df71cdebae4720ac63aab1ea96f584b1ee9a8133b2e02584e1d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DELI52504579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5940a5725c3dc123f78a226018b955a2ac994dcf6647c704b7e69cef941a76. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/DELI52504580.
We Just Won't Be Defeated (CV Vision Remix)
Hold Yr Terror Close (The Orielles Rework)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde20df1b6b82531908237bcddd7ac641c6d1f297037c290a97e5b3d7bfc0953. 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/GBCSG2400013.