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 0x8962a543b7be8e1a9ea34bc74762a617fd4eae248697feb8f0942a7f6739ff44. 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/d1e67c87-90f2-400c-9a1d-519745a50dba.json and https://artists.proofprofile.net/proofs/artist/d1e67c87-90f2-400c-9a1d-519745a50dba.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 0x39031189972144ce56d158bcc16bc35b86b6f388ad138e1b58328dc7b990e728. 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/NLF711500448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf329d7b24650a23a3bf322d8263bca36cf793996f6b132e2f19a30e01cbf977d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLF711500447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ecb6fe7dc385f9a413ca3552dacee84dbba456c093cebac919207c8560d6e7. 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/NLE801100459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf73c03d245ed41c812567e269f411d2959fe25c098faf41956e6025f6e93ac6. 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/NLE801000197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d04604d39b289c693026ff548ccd2c726d845ef238cf85cf930e2456b7948ba. 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/NLE801000232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01acb14edea384b5da3a5186554e7e91a6e214caa378c34e09d9046346261b5. 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/NLE801000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8c676f9275fd2c385f3744cd9245c873c91dd803bc8d982d20fe3cea87b291. 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/NLE801000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd843633a3769bd748b4756414fe74ea925cc955e3401877394b702e3c863daa6. 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/NLE800900223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59664643071bfb072709e06379c4bd9870a40f55bc275c5bb419344e0253a9ea. 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/NLE800900224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150c3009bd66047a5e06a90c34db80094285fb9b504d9307165a831ad3c12e17. 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/NLE800800114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ab1dcee305548be430442736af11e1242dbcf22769f4dead82da5033884878. 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/NLE800700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8201ceb2613fd93b4dd71a1f8cb36004bbafb61bd327ccbece752096e77f3754. 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/NLE800800061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa37ca6729cb98921fa9e69d32dbd708ae1e8bedfdaf2e68ae1b8869c00fa50c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/NLE800600078.
What You Need - NC's In Love With Prog Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd959b2dd105c7bbd6c0b395f85421a14660f59950d1a9a846db90f7f05eafefb. 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/NLE800600081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66140f2a56cc8d831e9a7d2c5129ffeac39ae7a827a70a9822d11c1bf21c760c. 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/NLE800500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb730139d46c85d7851abf01c1fbe85da28da039343479a07ffa0189ca04e9d4. 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/NLE800500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b4479f4caf5aa14eb05ecae6d021b4b7056703c4bc4005962e259f127fa14a. 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/NLE800500097.
Global DJ Broadcast Top 15 - November 2010 (Including Classic Bonus Track)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223dd2da14a3bbe10868bef76dd0be26445b894e1de0ed06c48b49798b8564e5. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NLE801000196.
What You Need - NC’s In Love with Prog Mix
In Search of Sunrise 6 Mixed by Tiësto (Ibiza)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe922bbfc216c82c53b41e8edff8283e2bf5833011297d6c49277986934c46431. 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/NLD681802995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd959b2dd105c7bbd6c0b395f85421a14660f59950d1a9a846db90f7f05eafefb. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/NLE800600081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52995beff65fc6f11d82afe306d2cf0aa4bbb2d65f8f772fec310bf9809d272e. 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/NLE800700099.