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 0xd3e5ae4e6f01dcec71f39cc696d6e6a5288d275aa778cf8e88581390c9ded7ae. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7507f78-46f6-4a02-9f86-9eed2159d15c.json and https://artists.proofprofile.net/proofs/artist/a7507f78-46f6-4a02-9f86-9eed2159d15c.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 0x2058b8cfd70d809094beab58e303416967de5cb5e83094a73ff9daecd4398118. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX282358667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84590a3ea554175071f92a8fdf4f9810271fa979f7337e076bd31681636625a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX872385251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6d3c00c630245b9f591fb36d1ec5496fca358808d574622ad9339b31b7603b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX872385252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6706f2b631d06c7daa2da19389279ef94fe09cd5aaa300eff7a08233515c60. 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/FRX872317317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a175b347ac046de3a460837d9ef8f47dc5b91c2a3ac80f1c7312ee08cc8de9. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRX872385253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c247f6a1b9c4ccc3c9e4cc55ad1ddf075eb20ebaee9062469b23c2c87af6d79. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX872385254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c73f3d801f2d099d0b9587bb51e3b79cee23c4be5f75ea7fbf4aa811572938. 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/FRX872385255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e6706f2b631d06c7daa2da19389279ef94fe09cd5aaa300eff7a08233515c60. 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/FRX872317317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198bc8f803d5aeb25a73f336b701611bb77c02f8d0be1bd0fe22555a49c0e5a7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZWFP2358791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34af8424a5a5cdacc72a4cadf38b81e5c96818eb53e93a10bd6e5531fe1fde26. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FRX202368315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffc9bf93d7a8865d7ce2960dc7a1fc9a9f0655c81c8d172a9457131203cd5bd. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRX202368316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929ab2b077acc9d9301ac51bdab095fc8613583cb5b96cf9b0d85fb588e464a9. 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/FRX202368317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa903b61cbb0fbc46ea6e2acf3be0b74ced5ea84351eb5ad08be3d38f8a67a651. 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/FRX202368318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b700a93940a0bb62980fefaf0fdb0c9b8c47585a8b427cd953ee64dda6a8ef. 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/FR59R2396409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5e0ef487e524ab50dc4c21c0bd8fe968e1ac3463971e41193cc4f7dbe8b039. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DGA072206103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004ad885727dcde44e3c499c1c4a693db1c4482c5a3efa4b128df60aaeaf48e2. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRX202282677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6071d8ddf5bd4c012f7e00a518d858151d2bdfc8a4cdf92bf0e87c9c2a6a8a4. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRX202282678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8ffea784ce3eba70b3956bffb651c6d805026925d2e8a41abab473527afd57. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRX202282679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff473101a24d33d7958962e0225a8ce45bab00df5ae665d674e34d97793d7f93. 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/USANG2104707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a335c7d11b0830b77550e908d640d1bb8c8354c7a11aaf303613730eea8442. 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/FRX202118512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71e842eb9f7666f4ef864ce1d413986de40f37b97b4be007d51ea2b4c0d5fff. 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/FRX202118513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5397b53f43bd766e70b0557c287b9d3ddba4c28dfe58e78917ecf462a34480ec. 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/FRX202118514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998ed4e1a80a0c4d96f9deaf3793232f436fee1af1c25b95ca97c86adc3e5449. 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/FRX202118515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9673217f8c7172bc87f9887dd80cc0ab67dfdb8d24fe3a6c2d2cef3882e5ef2. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/FRX202118516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005d5bf33ca34f5144227c4fd0c82d6fa809370d12b303b74afef986d36723a5. 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/FRX202118517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371829a5e0cdee64205faaa603e288a5a4055cacfa6e7a14a9b7ca0854f839de. 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/FRX202118518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f54a40b20c783347ddb828c8c4577162df24ec0edb44140d800daa61d039e1. 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/FRX202118519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb620111489449d87fc8a75b3ffe6d383d58e8710734d51748154b450e5110dd. 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/FRX202118520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67749288f97e7ec6e7a436b58a93fdcd6b1c423ccc6d039cf6b1f6401b2837e2. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FRX202118521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7407416a48b776e7a2dc751b2eebe8917ea98ce9fb90c93c1f94c2dba01fb37. 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/FRX202118522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78dd7e911498f4f4b2cba2dece33c08cf20426c93ba300364188ac9559cff24. 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/CZDN92400018.