FD or similar may refer to: Science and technology Canon FD lens mount, a standard for connecting a lens to a camera Familial dysautonomia, a disorder of the autonomic nervous system Fermi–Dirac sta
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 0x87fd7c16ddb3b7df955f150da924e11e22f85dc86a7193e05ba542abe7e579f4. 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/c5922e8d-34cd-4bde-9841-14d770b811a9.json and https://artists.proofprofile.net/proofs/artist/c5922e8d-34cd-4bde-9841-14d770b811a9.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 0xbcafd32c48301a8022e2a8386debdb2c6b73602b0a0a22ef0e37b00af1bbc978. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLM7H1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1965dd5d5312a377d302de1da1d61729188ea611c1cee65c4f472791edc09fdc. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/NLM7H1900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1787fe9c4c371a3e07c98134cb6497591c6c2af3e8c96c700284aa1663dc56. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLM7H2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a32a0696461912d2c170bade3ad80916f8838b1311d48d29655510691e095b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLM7H2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9f7c44a39272bbf4ecf9ce9fecdbf7e8c4bd41bca79e5fe1dd8e3540f9ecb8. 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/NLM7H2100071.
NQ State of Mind, Vol. 3 - Continuous DJ Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0093702c2693835fdf9ccd95b219ebe27df30ff2e8322d8bf65fdd037586255. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/NLM7H2200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bd37cb07d2a5fe82dfeb237c1e70854e955b5b0dd80c97e149ed6f99130535. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLM7H1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d97efdf81715097f5ac0b3650c96013182d8b8a32acd20c847be6738b91791. 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/NLM7H2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0503d0a466fabf9fdbaf6dd1380662391c8108c3c9972b49b41fc046e0b5f1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLM7H2200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1787fe9c4c371a3e07c98134cb6497591c6c2af3e8c96c700284aa1663dc56. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLM7H2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4df845b3d8e3a6844f8fdfd397e58f67b25e7cd264f968e738e6785e645485. 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/NLM7H2200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d7564dc7d1fceaef95610f80d4513eea78c5c99bb8f91f7a1aae903ffea1f1. 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/NLM7H2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b04690aae7455a733c70917fd90443c01e9d8c49013ca7f0b349a99d64e2c69. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLM7H2100072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5c796c5ad6d817889f6c400a105e903bfca32e24e7686cf22cdd5a98840ee3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLM7H2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479fdec140ba2c6b475742434209ac5109db8a317e2f40d201363403d50b6ca0. 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/NLM7H2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8fac71d1d4eed26f962f52fb1e797d7af79e3ebf0488e74b8a272f4a055fa3. 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/NLM7H2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bee1db648de30d53e6e28444b179d783219ee8e9caab37e92a09a61c1aa3043. 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/NLM7H1900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb60a0422795bcd1db5ff013df1e9321eceaeba902ee6eb69dedd9f5665b0e8a. 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/NLM7H1700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b620f4ee41d2fe3ecc149b11198ef374d6eb308c4f4d948f273f1a3e52c021. 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/NLM7H2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696d1f6f9afe97de367643b3ce0bbc99f4fe6710d20c92c513b1b0d937fb82f9. 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/NLM7H1800057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbbf9e05f4700c6485b8e035b6f0c79ef426ef45e11e72cd15dadc944e80f77. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NLM7H2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb197abdee52b86e481e8f982bdc4cb1ee514125056a3a244a6375a6d68f8c383. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NLM7H2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38123b8ab6eea0c3363c28afd18105b32d45f7a8225a7b3b94d9f226625232b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NLM7H2200065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bae3469665aabf8fba544e6bf40f75fd00d5fee53a12474ea3ca9eb4659726e. 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/NLM7H2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f77594174b8d39684141d69aedf4ac9e81a5f72e319e6419d61688c3910fd6. 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/NLM7H2200063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3d7092eb8ad544f8caf6b8935e947b9c24318cb49b431b97de18eea6211e62. 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/NLM7H2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40dd99dbcc5906f6ed8d1f39b8baa6df7cd94f3c3399f72de196336ea0a422f. 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/NLM7H2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb04d2056ce1a048464ebdee3ee1125fd7955e58f06b9ad1b6d8864bf294354. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/NLM7H2200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc04a7e3c9da5be17ed008685985c19d888c9d05e14dcf45036f4065b5db6c3b. 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/NLM7H2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5834e2dda9f7028cd6efd9b77c8d23356ff552e0fcb055695798e59cb2f939. 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/NLM7H2100066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1199e3e5fbed9a4bc4aec7cfc912feed4718123c944f7b902795fc6f6a6109f6. 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/NLM7H2100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e6d9162ce549d1d5aa9056b68e9f30bb19948b5a747664c55de1c99dce3081. 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/NLM7H2100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc04a7e3c9da5be17ed008685985c19d888c9d05e14dcf45036f4065b5db6c3b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/NLM7H2100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e978d3b026a1cb65a16e36e010b00daec965b27f3ad65ba5914c5e5869800d1. 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/NLM7H2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9f7c44a39272bbf4ecf9ce9fecdbf7e8c4bd41bca79e5fe1dd8e3540f9ecb8. 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/NLM7H2100071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfea86bbb82f2506741a4c3b91cee545be489cd985f5fbe6e90907139edbb8b8. 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/NLM7H1900043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de1671817522c2b6f7193f42220a0aeabc61f2922bbfc04647d9ebbaae51c56. 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/GB8KE1652477.