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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaffcda6d1b49dd128584bd6f53acea7c73b6649a9e454e48db42025ca83640. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e35bd348-e8bf-432e-9c0b-cdef4b46b7a6.json and https://artists.proofprofile.net/proofs/artist/e35bd348-e8bf-432e-9c0b-cdef4b46b7a6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb8e82c2e3fa808f646440a491a46dced80330c6889ca39be82df29f91ed7f0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NLA950300122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582cf89950489661eb219886152a43ae31d56fe3855e6dfd89aa29696cdb00c1. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/NLE870910307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c70de1560246598b004e1086de92a9d5c69b62119676a331ef46df6c40b1a2d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NLE870910308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af59c95c671c67f3296e25bdc31c3cdde872e15bb30863de70a7b3e1593ef1a. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:19:23Z), 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/NLE870910310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec23a1c50e91bece7fc382ed1de4dce0089660c0e35190cdb1c0fc3e26943127. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NLE870910311.
Van Voor Naar Achter, Van Links Naar Rechts
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d00f49c31cfffde5c49c3931997e5fa77bc3d929b900c8966faa6e4a4ae861. 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/NLE870910314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167e66194e10f17814e0e913f34a1043e9e3a3e661b616564a825ee247489df9. 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/NLE870911501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54251b29ca7a6d5313490e05ad2df0f75be5ef4544f9d1918b5da9d9f952baf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLE870703601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19ceddcbccf2653c384e519ab4225e0e2036e012cc7bb365516efac12993122. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:59Z), 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/NLE870708701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa595fa28aedc9e5f7276ebbd3a9a5050db69376c40c8f3a3a16600bf5ccde2ad. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:40:24Z), 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/NLE871013305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be7714a725f51be1bb3e74e6cc9975238338a4e1d8d094d6590109215c0a2e6. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/NLE871211002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce2156178db27bcc29daa0f991ee2a70a0cac379e367a09593a3e59e8381d02. 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/NLE871291101.
Ons Frans Is Vrijgezel (Ft. DJ Gerrit & Party DJ W)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37c22cbdf87bfbfcedea4fd582811a2ac8d1a22776316843aec5f9ef63b0e4a. 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/NLE871613101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249808a38ddac6e4626531934c926ea0d129cb85cfd03ffd3517875534fe0f45. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/NLD7P0900131.
Kleine Blonde Mariandel (Hardstyle Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c356da1b68740ba171ae2daa25e5cdec3fb919f2634706892de7b4e657a1b6. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GX53U2099236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196525653edf5608ac816ddd04dc22eb0b63472328efc14e91f1fc42a12323f5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLD7P2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29dffe9039db424cbe56a2d7a09d994206f5508c09a7ed032cbf8a27af460884. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLD7P2400002.
Feestknallers Top 50 (Grootste Party & Feesthits Aller Tijden)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2763accf37c2fd968fa1a7255430e3cbb218b48d41f6dac2feec66972a11c7d. 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/NLF290800442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291169582b679210f209a3342135043a340ecc7ac253038c45265e3fa1f5b0ea. 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/NLE870708702.