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 0x1beb88c378851547fc18eebb138ebc72ff9e1b794528c9e9a315f3333edf27a4. 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/273cf752-e9db-40cf-80be-c53970b371de.json and https://artists.proofprofile.net/proofs/artist/273cf752-e9db-40cf-80be-c53970b371de.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 0xde75a8f6c87b4bda9ce22297fc339ff49a7f8dec743c5f9b07477e2e3e677bbb. 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/QZHN32215124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b15bf36f75e1ba41e2376793d554b75bf49a0ffc7635c6172389175061563d. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QZHN32215126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ebaf208d2425d1105c4b2d11957d8378418d17c8c164366905fa0ca3bdc9f4. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:39:07Z), 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/QZHN32215149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d13dc26111725309bb5f742bf9ca9a3d327dede15b22cba347152916115f97f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN32215150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2d5d6ed62ec8d31d474fc3901be6234ed4d1efb02d57392c4e6503c1e240d2. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:06:15Z), 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/QZHN32215151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851849c1d26f4a7e8b2522612d4b278ae101cfbcb28a3a559f6669f43f01df4a. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/QZHN52234465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6800a1b5a1e70edaed2141f0438622695b588508212492365a10c8d545d683. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZHN52234466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb522de1c07b02a70628653295283b19f3fbefaa1a5127b3e4b579a8bac5c7a. 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/QZHN52234467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18fc2696f00a4dc362a890054a23d10d3605b8f51be31e159281d96049123a8. 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/QZHN72268896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d7e05478ae4f33882215346e17d41fda27b55cac0702dfcd03824b627266b7. 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/QZNWS2297513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6e1a5720609d90cbad704414b13de7572d3632088a6d71b2eee841625ec65b. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/QZNWS2297514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a4de122766adb9a4af929231ff3a91bb6064d41594ddff1e1202c7449dae89. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:17:18Z), 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/QZNWS2297515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c3a8ecca148e5edc984c61fecfde9cee6e143f87c7a4771640a75a833d53e0. 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/QZNWS2297516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99babba9c1233a5b484e1b0101e6072b1862714fd1dfe44cb8f8154be1a2add2. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:21:56Z), 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/QZNWS2297517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fe60aaff547162dad0413da1bae1777860ec797ef0ba74da2ecee20d137302. 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/QZNWS2297518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe552ad1612de9c3c7202fe669a6c67c59c1e66efa28fc6aa6aa64ba3053a881c. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZDA72348238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7960800191a2dd2d12af5a0a674a0ac3fc042bbd3f13e46afa9ba400f51c0e0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHNA2335826.