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 0x5822845adb95b6f4e4a5a7ac1f995ca3dbf520d7302f94b31e0c2c447560da3a. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05310759-d955-4bfc-87f0-08ddbf7e055c.json and https://artists.proofprofile.net/proofs/artist/05310759-d955-4bfc-87f0-08ddbf7e055c.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 0x3a146379bccc154bccd174ebd3fe65b0ac781bcc5862d4802d298201db866f79. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZWFN2344855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55392b89f82e6a3373a7e2a735e3fc7e730a42db6f729555ebc6fc7c5ebe1b24. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZWFN2344856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bcafe2bfbc436daeab0b27eb5e5b460c65494a2836cacc4d0635b514e7fa8d. 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/QZWFN2344857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74654753b071a82bc4baa19e5d913f9006f530b8ea4a9d3a6b1db6130af49d6. 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/QZWFN2344858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7480e5ac679fdb9dd4ac911fbb4af34b3a3fc0f39f8820fb7f43e37cc72fd074. 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/QZWFN2344859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c01bb90040394e49a0cd1274dc490f5c04072731a527d543f317043b872f05. 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/QZWFN2344860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5f8447fd8ca66ce504aedfcf43876f78d65a9634f5d2a27b83b464ecff84db. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZWFN2344861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e40a534a120b23db7ecfe38d0f106f6c737e0ea431b969b9ea40d482050ec03. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QZWFN2344862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3ad69fc93aea249ecd551b53dd11a38b0c0c0c8392c5019b419450ebd5485b. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZWFN2344863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74deaa60d4f83c5dc773164351bc897363748ad870cae25dfb2528f86f971c92. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZWFN2344864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5204b5d482b8cee32f59ba23dea0ad43b715b0044f7c2139a535eb24df499016. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZK6K2308116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d4e72ba4059951113ec69652723e9c5ca865015ce2604750d55e022328b17e. 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/QZK6K2308117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7406bf072f6d054193e644f1c2926ddb80399c2df3ee9a7ebf002a23e3450977. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZK6K2308120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b81f9132e78de52da8f6875d34495aba70b219d067cc8bcdbabc93349dac9a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZK6K2308121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3aa9f568a4aad2e0a97e54c15f7838483a4ec5b0a1c0fb35e69aa538ee2291a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZK6K2308122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb9404e408b87a384826fef20947f64e59964fe7fbad0fd37e65650f432f3213. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZTAT2475218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b664c6d40cec003ab0cb8c6133e4592186c41dbc3386fb1485b5c8ff4622fa. 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/QZTAT2475219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab4e006e33a902daa6ee51dddb7d05ca894bc108f48b1f30dcda45a184df23d. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZTAT2475220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0840bac615c0eb5483e653135151caa83dc3fe4610859ffbcf8bbb3123d58240. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QZTAT2475221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1450d4c6f9ba3196cdefcc3860ff518e142bac2bb8a253339153e188af9eb94c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTAT2475222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056971baa173f4f706c813118372bc5bbad3eacc761ce973230cef6285d39568. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/QZTAT2475223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2ff7ef7c6d7c55afd3fb287f038cdff5aced761d3baca4de8586215517f5da. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZWFL2305617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c24863ade062a194f3217a337d47a3f720d854ac68d6247827c006ae5a61857. 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/BK4DA2315587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fdedc0ce38ec9cc9808f1fd064fb0af99186f51198c749323b1626511e426a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZNWX2373758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3e562172eb14e20480954663c93ff872669e74d74e0f5b297cbd95d8bd28e7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZK6N2324056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf486381425c58733e6d607a75e5141217f0c53e24d2d3fac0c943488061eb590. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6L2240926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c24863ade062a194f3217a337d47a3f720d854ac68d6247827c006ae5a61857. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/BK4DA2315587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262fb6acd261e5e94b40097cf841f64134d51f0b4e53b2a812394bb29e57d788. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BK4DA2321965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbc514b1be19692c74f108012d5a5734c3ca7b7a0dbdacbd415a0ee489ca119. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK4DA2319768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceea3da5e99fe51c2b12b66d132c9f69d6d293b08d6721570da01b04922f434. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/BK4DA2321275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47848c7366e27f6fa4ab4830fdef93556dada8d63a0fde1612032170e855b7ed. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BK4DA2321966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63dabef2e9fa80afd63ff9f1f9c62dbcb459bc585fa978de746fe720d907f9b6. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/BK4DA2321967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ed9597cc6028df49a31338d6171bd5f9809df6dabbb50980cca028b907c605. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK4DA2321968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e1c7020d5d9b773696844c70eb36e59f595fc63bb4ab2583755f518862320e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHNA2422735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05de7ab17930e0109681af982948ebcaa81f162185239e01f2042eace6764131. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZHN52415355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6b11c35f83bf142cc4fcd7682dd2d5e1d1e7ead26900781228ea7e6f32ea28. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6N2464587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeef6fc847f57c65173cb3a08219be7e648d40a6beb1f1ed78d685a84dc9a3e8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6N2464588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad249a5118543daf067954b01ac99ec0a9111362d4588958ef5d1c7e50ab437. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6N2464589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7416e0a14a17702b49025117646b2c2d09b4fe1fa7de6dfec6b4dc2cd31fd666. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZK6N2464590.