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 0x1ca7d0637b24eb77e060a5a5bdf5a27657d2d8899c1665683c6a7281fc22df98. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5aa5167e-1860-4063-81de-a481dbfc0b02.json and https://artists.proofprofile.net/proofs/artist/5aa5167e-1860-4063-81de-a481dbfc0b02.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 0xadcd5e065177700392349a257ffd0ed259b2b3e63a58c71dc4562994f1c52e17. 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/NLW2R1708750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49ffd2c02ee7a751c2935244abf1ad7b0133a06fab2e2892ce200d94532c7d6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLE871421203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b119d9131a39ad0a874f6256f7cc68f631b4cc695749462e1f7e0d1334abed. 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/NLA522400448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad35c6afb09161d8af4e6ff8e365f23a8ba5929d79a5473b5516d1309b49abd1. 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/NLE871312001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a11b2f0af0cc10657ba20a070257031b0b8f505d7ec4a2dbe51d90750746edd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGH1216776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daf9c5b385f28ce17360c3aec34f2ae3eda4431c2d2ce64c51452af5b72230e. 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/NLFV90800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c79d9ada60e946eac2bbd6c1f1a54c2b71a10cbae12701879538c53cfcde97. 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/NLFV90900001.
Peter Smulders The Greatest Hits, Ich Prosit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7893b0e893f427cfa8e39647bca9d8ecdfe286089d174141ced46302c290cdf2. 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/USL4Q2042949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ac4ebfb67045804e2a04e058ddcb6c6c666a1a47798549579bd95d16685838. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USL4Q2042952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2706b84a221fbc3300c22c0575ca24baf5bb56bc0b8b85ef28610bb450094fb7. 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/USL4Q2042953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x746bb8e9fc8ddc7134f9170402bc5f7108dfac5b84ed32b037e6fd92cf231e85. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLZ130700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daf9c5b385f28ce17360c3aec34f2ae3eda4431c2d2ce64c51452af5b72230e. 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/NLFV90800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c79d9ada60e946eac2bbd6c1f1a54c2b71a10cbae12701879538c53cfcde97. 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/NLFV90900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a11b2f0af0cc10657ba20a070257031b0b8f505d7ec4a2dbe51d90750746edd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCGH1216776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5def8f42fa0d94bc46cf099624f948b44dd1bf7595358be241c2020c6be44ac1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLFV91200002.
De Gròzzie Van Mèn Buurvrouw (Derin, Deruit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dff19ae7d2d43393765bb9373c20044ba28124a099dd433109fd4b97893897. 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/NLFV91400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843bbb084fdc8da7db7f5d13824cdc6a8dd67a0b5967322240926da8e4c7009e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLFV91500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329db140035fa74f78bbf36530f3e87d54406dfb32f9b6f5b047c7717c96013a. 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/NLFV91600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1e2fe9c74216d67aa0dcdc72b39755e85319b6415ee571a28819de0528ba2f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLFV91700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17b381626951e67519cc8df9866ad8b7254b19dacb9003d4fc7748635d42f35. 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/NLH910600974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59073913b356a53323e81c35550c6c9375cae32fd319b20cd22ab3350bd1f248. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLH910600977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70288911123813632977ddd59722d414b051adfcd9b1525942d903de5fd365a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLH910600979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9ba42b0eaa50e3b8132f97e051c15d0a8e7b45fb6e219eb0e97ac40ade6d7b. 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/NLH910600981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01573d70b2622c8a9c0f84f9d1eba25b07ca292606fde3d12a7b8c040cd771b9. 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/NLH910600982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cf3116889453365a1c8dcf93917896a2f69cb71194f55f50ec3d06a584238c. 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/NLH910600983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1881c723f8566ffb9c4ed28d3949f7e55482a54f164b417353a916c2c52f33e0. 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/NLH910600984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f78c38783bc9e5896f0d8fe17d10225803b0bfa41d8e52dd2a9c4cdfeebe23e. 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/NLH910600986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb016871ece9880743262e13109286a17fb6726248115b325782b5b89ec4dce. 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/NLH910600987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36566a7f6562cd007dac00e2ff07c2b03cd14b47895e46844ddda1113750185. 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/NLE870639001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b560519de7827bf40b6ffee575c64ff76391a478454850037c7630ce71182f. 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/NLE870891218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541a68c77b8ad4e56087745765119a792e475260f94b53853611575d72436455. 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/NLE870891219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae823d2e0f39ea813b2240c96d36188e8421542dbe6e26f7ca43956595551f5. 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/NLE870891220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1d5c9fb09f487795099b9a6953140c84670f14ff14a3ccfb1b027e2ad99a99. 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/NLE870860183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e8ebf24d30e27f116becaaeed0d9ba4097cacc3a77fd50488226e8acc1df1f. 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/NLE870891211.
18 Originele Geheime Zenderhits. Deel 35
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4955fd6ba17d2d75e518531421a0e19e8599402dbc40dcef06293d2917cbafd5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLL532103502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29035fd6dad1f46cc14bb6ef97747a69cbac2d535963f36bd91a2ea15725d295. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLA632103505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982b63da5e2a400bc6bd4149f2e36fdb35d6a3c75f3dd275b2c0e121521389e3. 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/NLL532103507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8253ab1e4921d563dc7fb432f93531e56e71dca03edbc47c8c7be709b9b41b69. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLL532103511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6692cf99eb69361b90ebf09a511236b52668d7c3729e473867306ef5687a8c. 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/NLA632103512.
18 Originele Geheime Zenderhits. Deel 34
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae595bea7d4527b9a18307fa96d3e3d9baa2dc17adbc8617132471066902f2d. 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/NLL532103417.