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 0xf2ee8e646e7f83c0a1a6ff22e5cf3ecb1febc74a71c5c845823f8c4dfa84ef0e. 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/f3b799b7-19a3-4848-bf27-e60689d4b5a2.json and https://artists.proofprofile.net/proofs/artist/f3b799b7-19a3-4848-bf27-e60689d4b5a2.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 0x868827ba2a27394d277db1535f7c20f6bc834797173a5d240ac3b789d2215eb1. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:04:15Z), 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/CH7811928627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0dfc8a7b952f523b9b34d370f947ba5f6cbadef9935c99d5338218708c4e1f. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/CH7811928628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5cf1e0e210a3120f5bc3285b259ef1de7fe8d81c6f2998ad8a40d3c2d2536e. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:39:29Z), 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/CH7811928626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3fda018fd8b951259fc0dd31facced09fd31db945230e89bc9f435adb6a6aa. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CH7811928630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00939a8ea4e0513efd4a9aac620c653e6391ce6cc38a0fc9652dd52929fead5d. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:19:46Z), 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/CH7812052537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb89394dc29e5f32a9a512415abbc8deb65bd3fff8605123d13d62eb28315cab. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:35:47Z), 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/CH7812070210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2745b63262aa5a8069cc1ea95bc8b277890cb91e42810cf61b25f706c72539. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CH7812073447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8069751916ddbfc5151f1e7d5bb0468799e763695cf52f7a03f401f03a23d4. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CH7812184445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2e2a135a489496ebbd8b52c2b7377af8d68958ecacc4e11ff889b712d20755. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:41:42Z), 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/CH7812191216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b9525cd2450eb3183b10b42880713d19ad61109e1f4b4d876d5df4816c8a12. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USL4Q2164148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f83bcb679d432497a5a8c30166b72410edc36556c5f78b5c56b897019f54a53. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USHM22291216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaebc263d61d249efdae403b2791be481e93db12cbcb8861adce78ece3993ada. 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/USHM92240793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a35027448947c8fd2754b0e7d4933dc2542bd2b8bea8000faec3a41ef74a81. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4R2232545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674a920eb8613a6bef74f83c7446ba0db342e7d76842a2b6b28dceee02d05d14. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USY282324277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29537886595a138c3b8027d7ebde328d00792976c1ed5ea1f3637256f68e1c6. 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/USCGH2447824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c0cd0ea5269d89cb3a87c724873fecfa49b589c64f62ea7d1b3ac3b4af9422. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USCGJ2427758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532d64a8157f4e35b6f565ad40d14f684bc87276f2850ceec61b8a9f483bfea0. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/USCGJ2480682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554618c69037a3836754d8babdc8717303e4081e36712836e6ad6b43f8371977. 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/USHM22471609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1cfbabcd28a09462d12f8c5b3adc75c6975c723c2ad249fee43514f6e98d32. 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/USHM92438647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9badab1fafcb4cc5e4c007fbb9175697a6e9310353c0a9882ba79ce2703ce4. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USHM92438648.