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 0xde037bab06af51388c45b56b1970d54f98be1eede59faf19310b51cd48f39475. 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/357a1c18-5b8b-4d90-a385-09fbbd5251ec.json and https://artists.proofprofile.net/proofs/artist/357a1c18-5b8b-4d90-a385-09fbbd5251ec.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 0xb21a7ccc2100921d195cc9ba21f6be350d33e9faad2415d3d6c4160cea65532a. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/NLE870816808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9201b7a6cb380862a0e3c8b0bd514673c648fc934af379d8a456f5a9ad949a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:32:52Z), 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/NLE870816814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7298ddf78ee9bd31991d5e0f58ad03c4d6f3c7a3c53c8b74057bd73d7450f9f7. 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/NLE871017501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf018245f5fdae02fe0bb66ee9d8ae30ee30add11731f9e60728216458d1d9c2. 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/NLE871123001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4f7c6be6752ceda9a93b1f905404197ac72fca447aaef9630dc87925801073. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/NLE870912502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21e71d82b217a1db496d80cb0baaa6e065d308643da9eba06ec8cf2149ca79a. 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/NLE870912503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc660690707307649dc13b7c7a99e67385aff8d14bd4889df06652670206d9de6. 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/NLE870707703.
Oranjesong 2014 (ft. DJ Jerome & DJ Maurice)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd48364c3c570fc25e4682dbb30428e99a36a266fb42db5de580da389ce1911. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:48:08Z), 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/NLE871526701.
Wat Zullen We Drinken (Bonte Carlo Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e73712a2823c0475c1997880289624e2259a7b98bda77b617195a9a7a73456. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NLE871736301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8387604ed27f5d1351b2002ce76835bb3a9c468353c565dc5f9fe3b937ff24b6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/NLE871728401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa213df118731b9969fa3ad81388629649e039f4303e91397536d0b80ae30a997. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:30:40Z), 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/NLE871315901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2ec853527db8715e59b8bfe41407479fa8af9a842a00bf65f705fbdb052e66. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLE871718901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142b28e77b67c97476f85a7f2af9dcd9048620bcccd9848ff5c9f12bfc567108. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NLE871445301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3a706bc68176271ae73fde1aedab2595a0f2d1629f2daae8a1196144a5795f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:49:54Z), 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/NLE871919900.
Sex Met Die Kale (DJ Maurice & Dr. Rude Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f9b82826f2781d72bdaccc86f182be8d31f12f804681fa0cdad9ab90d06209. 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/NLE872117101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0729eff0add22bb999cdc9a624c054882c7d44454409c419e522f250967485fa. 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/NLE871018701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a6835468933776014db61a7b2d8a72e1962eae825ec7a35ec38fcd6377cbda. 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/NLE870707701.