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 0x14a7f946304d76b00337bebf38e75b7691d288e951c00e2839682964aa4853a9. 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/c6590a44-efc0-44eb-b5b9-6efe589df93c.json and https://artists.proofprofile.net/proofs/artist/c6590a44-efc0-44eb-b5b9-6efe589df93c.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 0xe6b54100bffb4f2ca20f16fe24f3b64864d1649ddabdb636245fdfc0465892bb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZGLS1945086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abbaa35c90e28cfd2dc1bf53bee60b6c1a40d6112e4c36fccc65252e095ffdd. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BRQEJ1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12cb347409c9ab52277b213d50114e87f7509a6fda091161b472a5c3a57cc53. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/BRQEJ1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fc3b1e8d3b04d176d6b90d0c3b6fc9c076dfe9cb1085348eef70225b91b4b3. 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/BRQEJ1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9754ec2fffb0c8c6690134a218205d5ec210bcec46b1fba418b1b576a51fe54e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BRQEJ1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195a8f459cb587bc92ca73c33301de1a3e6a2e559f3b7a1076b5dd15cdbf90bd. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BRQEJ1900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7d1fc912560db0594254d71e2dba57cb02f3b9ead82a6d388ddb486d107709. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/BRQEJ1900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f9c3192a610ab7e7805ec1175c56d6adf6d605002da38c6095d0a142fe26cf. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/BRQEJ1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87fad73c8d2e5b7f25fe6a651ffa2465ee91789f7fee7d1c603f42578c79ef26. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZHZ41959099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf23a6fe5b80bd64cbcc47d5e9ff3afa27185c596f3cf7ca542a4613d63ef81. 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/QZGLS2012576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1118abd73988636093fa6cb43644a2031d95d7c2600f7983db21b4cc55142c77. 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/QZHZ42026365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7c1a745ec7282694f497c7dc548cc8751adb2f52f3f095b4585250a8e99587. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/BX44O2202029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd587c5be1017575584391320c2e8bee132515d81e9612a20d0eb27f26a965925. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/BR4TF2100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16bf8c4d025227857247b8600c9c5c9c19390b5d4a66ec5e089a32b0de10121. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BR4TF2100334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dae8df469b27afbf1c20921ba52bb24b904f9d74cee401260ddfecf9dc3cd8d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BR4TF2100449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe665f0bea41a855047d795b286cc81abcc23584ef65cfc10741f3851ef02e59a. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/BR4TF2100914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1efe30711069e3b3e3759975ab4889e018f24346bdbe7d1f445306aee244b79. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BR4TF2200254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fc96db7e95b20e53a69a999f65d16cf23d49d694afc1c4ce160f9b28a43480. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/BX44O2200884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db51f336135a17be536e6ebcbeed8264e9d74a3e849035294b83e0fa9dfae0d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BX44O2201620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dc7e7249542fb32723354baf25f83334a075131b4f41f0ba89f55a926542a6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BX44O2401538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5612ad9ab1bcf524de584ce7364697727b534a668d198ee2b0e0b55fb449aea5. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/BX44O2403160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b549681641a6165b4d1d88a7d4648d8c4d1b1ae54b5d33c9c246123ac4109e4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BX44O2202197.