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 0xdb1eb7d07cfd0282322fee16357e057eea7b49c11487634497d84c7f7a999006. 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/dd4abcfe-dff5-4d72-ada2-61af19c6b05e.json and https://artists.proofprofile.net/proofs/artist/dd4abcfe-dff5-4d72-ada2-61af19c6b05e.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 0x4c658291fd9b1076b02c2bd1026ad4bb5bea538c6938d2ff3bdfd777eb301a0a. 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/NLF050203271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f875fd22482744328ec308b2cdf07c7112cdd0bbfd7f80a98cc29864ceb5c00. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/NLP421700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8961060946f2c7dcb8753e739381c8639c7766479b088106c2581f1aff0ed9e3. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/NLE870916506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f8dbae420253bb008dec63ce3dd82b92e0b535f610130299102287bced044b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/NLE870916504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe807e18b3bc325eed1453b9c03ad7f28109a36ef289f5b4b1c8ea07b7c8f500e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLE870916501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f459a2977a9bfd0b77f49054bbb589002855c863e33e296008ccf51ae746034. 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/NLE871020501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb057e1f2d471bb351c050a12cff02ef00cc746e7b61623bb0d764847bb783954. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/NLE871082505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea6324cacc69ed2c85108d9d0c04e3d4064603239f7fc23ff4fee36922a9c58. 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/NLE871082507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41fd87a9b3d809938ddd84825953ed9bd692ac344baacc904c117ab33c2a2a16. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/NLE871013401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fb9e72e5c7ff3bf4a8674c4a796bf214f9e37df446b972d3876ec966a18b34. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/NLL080504311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ef20db4fa2cb3cdfaeffd0973e56fb95b4b4aa73801cc8ea23d989c4d8aa99. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLF050500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3601844b9987e6b8bb9046b361dde98fdf4d8ea4501936088c87ce9813f841b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLL080504314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae54aaf63046f95622219ca712577f0e257f7c27048c879f27293d9a87954d47. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/NLF050500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daea79bb7eb13bd110f8481949ea686978f2db0feb69c7165e6fd3d2726f56f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLF050500171.
Vannacht (Zet Ik De Bloemetjes Weer Buiten)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd857c671a6c95274ac3d2ac52cf1fb79b6e5dae35f1e1389aa974a2c4e69192. 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/NLF050500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7296c87af2dc1fd165f9826517d02fe6a2158d33d19c2f8377fd34e96c7089c. 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/NLP421700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9894f22630b46fd33d1c8e8cd5f3d9e5bce0cdb4ae0872b177a8ce0399d09183. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/NLV4S1900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ce38e9aacb7b9f3f78f0e773484164b968d0949bb7d91c05aa8aea78797ec9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLHA72200090.
Nooit Kapot (D'n Echte Dave Hardstyle Remix)
Daar Ga Ik Weer (D'n Echte Dave Hardstyle Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5621e78d26ffe4a49e06005ee310cc3a9a764e299331b83d3c6622cc62fc6fd. 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/NLE870891113.