In Internet computing, NSD (for "name server daemon") is an open-source Domain Name System (DNS) server. It was developed by NLnet Labs of Amsterdam in cooperation with the RIPE NCC, from scratch as
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 0xaeeab23fea1fb6b501798fd466998dac134e57cea24abd2449c6853bc73ee670. 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/d5885ea0-6841-4c38-82d7-e5010eb7a8f0.json and https://artists.proofprofile.net/proofs/artist/d5885ea0-6841-4c38-82d7-e5010eb7a8f0.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 0x5e83b8557fce11ad82b997af985522396be4ba0f6ff7b23d3139c9a668609567. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GBLV61601122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6993451108e8deafffcc03a62753109c1cc57d28391426e354d21e924f3ffc88. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYY1941210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8b04e2555f687382aa54beb6d9f81bfa6edb8d3d63c4ccbc2052765ec14fd3. 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/QZHNA1921446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb2a7e9661c890c57db644b5c2a77a9452e4d63b83fe5021547a2e5cdc0cb59. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6Q1960397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5710fae1e2c21f4763f1475f230c9547bc698c2507a47d884f2cad188459b81. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZES82092348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe522d8dc26218e3e4ba9ef7ce4d9c1c7b538dab858b89c107c71b079127fb974. 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/QZK6F2009555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a608451c39ac56f2e6f363c8fac063fc890f57ecca92b715459b5a4e140cf0. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZMEP2099602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803652a57f3e69e5a438a49c61a70ba7d12a885f19a2d0e8711804613d7d2114. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZMEP2099603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09d514e3d003c49a3bd3efcc232cf2227d2f8f54b723daf7a862cfd0d1ca1e4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZMEP2099604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e07176f18dcd7f37f186bd61ec80cb04b62a004f8a580de875def132fcacf1. 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/QZDA82189125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f16a77a07a07a5d500feb223085b73b889ec15b47fc152e4cc136265272b1b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN82149852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a63e620a0cfe91a880e322414198a8ff402dfd7bb4b41d34a70eaeba8044890. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWS2167188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ee3a33bea8cdb96891d786fb2b7906654742f4028fb4c83d2f7b489b6acbdf. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNWS2167190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f5bd8b35f848e24bb2fbdc9a2459cd159e19bd1e69ff5a19675e1b89b046a5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZES72255681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00091e4a6e0bf9adb40a5475e292d590c6c1ae5b1e83dbebd5a4ba3ccdcbcb9. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHN62213731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb690edc4f33692b857fa5d2e4922da86eeaf189c74c410282eef6f958e2a2a9e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZHN62237217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e99d69381daf22dc62c455fec9c2fcf53e289570448361f06a725f4ec6c50a8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHNB2285908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff1f6ba1da92af17fcefbe594cb206a84afbbd01b664a8ded9131e5f6be1ec9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWS2290112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27620563f64e30adbc9a5d404ea4c8fee7202e6d2a690a4d58a332d4f60a044. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZK6M2316396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f39463ff4c86a61b7f899ad3308153d1a172e59f66da67020598c5dbd59f427. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB82347884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74c736791f66b0d4d69720daf335e2463f9c90eb2f9dbe556f71e180f41c409. 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/QZHN62461521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d462bf21254999137536070805485e4c5840a27f93b8eddb00365020f5f4d14. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZK6Q2456894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e44fdbf0cb97e0d6c5db799f33d275e9c466ba9d16644b6b835369cffc55a96. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZMER2439468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62664d11d99d6dcdab0174075a3e167ef3ad1a0dbf498c97899d49780e860a70. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZWFF2455503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabdc2868fb61f9749bf356784948633a38583ded96f0ea47012b46981e9bc55. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZFZ72526928.
DOCR002: Sneaky Tales (ALBUM) [Original Mix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebf5d9c2e2840b85a58c65e42e7cc772e90538e630b45dd98d281584d09349e. 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/NLS161801689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77e0a40622f1629744146aa73dd0d4f8af2a42d34c362628aed81537cd429aa. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NLS241900269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774298d21ef7db3b6319b090d4039db090bab9a419137f5028144f250dfa787e. 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/NLS161700860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc908bf1022e001e7850a13738daeee8e979d084d35c65a1dd06bc14f0d7b26cf. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLS161600623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246313ac4b766ac3fbf716b9d0a9e511f758c81d42cba3d7652ae5390693615f. 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/GBLV61601121.
Hardshock 2017 Mixed By Igneon System & Sjammienators
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902815c2bfd8c3978ac2d67971b80fa205112c9204c17f3e0bfb35a8009fdc9d. 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/NLS161700679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c64668c82cd002bf240239238a1dded77484467a7a4831210aaf8baa8f216c. 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/NLFL71800347.
The Underground Festival Compilation, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ce35d1ee118ffc62df008b73f4e322f6e7cdd535ce17c8ce52504cf0af179a. 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/BEFWX1908602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e220429e008c5c69318b01d0091922a5833061c29ca2373b6e0acb49f572ee. 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/NLS161801959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1236ddef3cea5204d3efb8091692823b243336f59d6d0319ee7322c1c2de9971. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/NLS161600391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1236ddef3cea5204d3efb8091692823b243336f59d6d0319ee7322c1c2de9971. 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/NLS161600391.