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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a17d486fc9e1003e1a193b8ae3b6e5eb35452a47c58af405c9d7ea0130ba94. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85bf92d9-7b97-41b2-a5da-fd61117d1b90.json and https://artists.proofprofile.net/proofs/artist/85bf92d9-7b97-41b2-a5da-fd61117d1b90.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fe428a29efe4413c93b4451a9dc92f7a0e1d190ac60dfd8a8f4b06d454a47d. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USVPR2300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929d7b685a5bc60d529d5b228f7e3043ae9b20e824169e256ff5a380159f4fbd. 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/QMFME2370244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdb7e3fb932867125e43849afade6629ec48c9fe11a8ff4dc5342e9016c68ac. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QMFMF2444907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdb7e3fb932867125e43849afade6629ec48c9fe11a8ff4dc5342e9016c68ac. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QMFMF2444907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2586ff3f3250dfa8638bc174a452b51c0a0fab45afef49343c4165524246c5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USVPR2400184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ce1cb91bba419b12b74df505d6724805df9f2fa01e6487d716f7bf32851bd8. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/USVPR2400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d90ac233d99be000c2eafbf9813e8d974cfadb5d7b4134b8d3fb5b723cc9ed. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USVPR2400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f36923bf0c68e36a64d9d59aeaf06a1d5c8dd401604264213440fe529a8775f. 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/USVPR2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702499ffe67a715cfdcee881dd5661973a8faa40f7c6d746b4256b06317b6eaf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USVPR2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6904ad91ba006767650212cb2719d2554778d86d7db35f0341b9ae4eb8a18c4f. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:47:50Z), 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/USVPR2400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d7bfbb71cfb3160a9026d6785841eff29c4360c5092bb6b61853b61d69fccc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USVPR2400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e065db3c2a6b765eb424c8df39651164411f33dc4cc997220e51463df19cd8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T09:01:57Z), 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/USVPR2400148.