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 0xe6625f2157cdd921b98e7b7e78d02ec289f32e17a294b16413b85b55f4ff00f8. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1475c1d6-ff4c-4782-9cb7-76ff6349ea50.json and https://artists.proofprofile.net/proofs/artist/1475c1d6-ff4c-4782-9cb7-76ff6349ea50.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 0x855e6d8d8cc9bf30a9d2630afaaec3c06ce77288fec9461352b1090dff76f26a. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBSMU8674197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26006e1db35181fc20fdeca8625c7d5531f7dda8d566e46e63132edabad711f0. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBSMU8674198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1a9021ec6fcd0106a8c72d2769aff3866aba3d0eaa831637bfca44fd4d35a0. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBSMU8674199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3adcfcbbcdb1234cee5158ac459ca421d74e1b75183031d2dc83e94f22336aa. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBSMU8670535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7540350ab3c78db7d94f93685256072091a7d9aa79260314cfa18fef2873784. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBSMU8670604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4747991b50e154747415d0e301112d3b9f6c71be7d60cff638b9b700f2f0400. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBSMU8670000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c996724095852e04f613435a9ce682e9bbaf7618d8e5cf36b9ffd2d108ee45. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBSMU8652690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c72889ddbe8a6ce1a089400e075f6ef9892f3192d960464b9addf072d5324d. 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/GX8LE2448578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4b6a7bc14e8c646260f18dd2a46846c463c5c196b70f0aeb37ee694a79e298. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZS632488809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd782a494e28e329951fc97ee8fe0300f58405c766456a7539d98b4344445bbee. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZS642429246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a012bc43a5111059f00e6da017dff2ecea1e0473f5b6511dbef231e5709183. 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/QZMHM2463916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0ec7c9e37cafe72a1a27db2baeee4883d547f050ecc18270081421ac7ea35c. 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/SE62M2302460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47d89d4d5bb1c3fc3e4bef623d4cd09cdfdcce47b07ac53ac362ef0b4ee84a2. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CA5KR2421332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa7641324f1cc8ffcbf95741bd11cc1dfa17234a1f3ea1c5605657630d5ae45. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GX5MY2341603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212d355fce1739bacb97fcebef0138882d9a1ed03b2b0bc7ffbe1057779859de. 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/GXBDS2313267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9d4e7cb2940194f7d90252e7f71089927db6e3f298a335254d6ebae21a2206. 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/GX3HH2382690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e38e4c79cff4145dbccf43969fc7350bcd6f977f5e841b3a5c02989da54033. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GX8LD2366622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2af472c8c3b602c4b0c39cad6addd871ba4b6094b949b98f30713f5d4d061d. 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/GX8KD2342723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22042742946c70ffa7f0ee9b60ccf989696aba225f75611d93ba83757efc9882. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZS642237016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c59491360e7146b8c0568362ed0f9b7037197d4746ab07f2f1facb829ec1f3. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZMHL2253811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde84b87729c51357f1a2366e732d4c22155d1f95928ef4d974bb8c83f3bed257. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CA5KR2197122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c236d83cf9563d0260bb30595e1ecd60da9cf12f511dc486f92feb50994cfce. 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/QM42K2116781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c69d33ba6d99652478aa11ca8bd92a5c36fcbc3650f34719d920378e709220. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU9411516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc946c46d4b9a4ee9880e1e4c80bc049833a78f8e1159d8a49f8749a216697501. 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/GBSMU9298558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ea4820ea711b04d7d83c54e23e74ab3bbfb897a448261165412b27c51fc6a7. 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/GBSMU8948478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2818a70a715e6717ad8a9f56ca9d99b1ef0988ee3f5d1c51348f2cc490976d. 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/GBSMU8433325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0decd775b52330177de749e8632dd0d8ab2635095110309b5ed31485f900d4. 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/GBSMU8433326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206c075ca1df00bbba0523e1d264d26d1c7bbd0faa66e51ce4da052280c8f288. 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/GBSMU8429418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081c9d0f8504bcff75a40f035b8850ebcc88c897ea2f8d0569249f2c83cf3c58. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CA5KR2508944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8b34bd3ba93115d48c44ea466af58a71e776dc62e4e4f50f4052583a9af4ff. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/GBKQU2399068.