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 0x1263fe107e19ec3bcfa9fd37ce3508ccbb211f6fde7656a082f6f1640a15374f. 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/ae5d7ccf-4634-49fa-83e9-1d7d99c1295b.json and https://artists.proofprofile.net/proofs/artist/ae5d7ccf-4634-49fa-83e9-1d7d99c1295b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0xa7de6020e70c963745967c667545b6fd55fa0f51e11d3365ec2393fcc3f190c2. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFK2460296 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf144dfff5612674a2538d6ab48e369c362ab611507cd9bc4b0023da037f19c7e. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFK2460298 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf935a098119cb813e948c07748b0a4b6585684492ab3e42c2818cc64a018194. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFK2460301 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac790dd5a9a50e7cbb5e1946b8b1167d2163f773b87f201deede69e1caafdb0. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFK2460303 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdecaebcc9ca032883f725525ea26f996baf49b2810906215ecbd90e09c09c9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFK2460300 — a six-check JSON result.
The Steel of the Astra Militarum (Warhammer 40k)
Lament Of The God-Emperor (Warhammer 40K)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000fcae434dcc1b551c0d27b9e4b9c192d654fdb69b8d38d9f92214187112b29. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFP2466182 — a six-check JSON result.
L'Hymne des Croisés Noirs - Black Templars - Warhammer 40k
Les Fils de L'Imperium (Space Marines Warhammer 40k)
La Reconquête de Terra – La Légende de l’Empereur Unificateur - Warhammer 30K
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d2ba5168afd46babbd42c17532bdc5fd02107dffc9035037293e252976ad27. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ62591981 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5101921768e41701062b193cddb190823647aad7ecb0c7d086f0613a26679133. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ62591146 — a six-check JSON result.
L’Éveil de la Nécropole ‐ Nécron - Warhamer 40K
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efd0fbb54948b6c9fb352af269609e088759825c03cce4eee8069c53598623e. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ62593269 — a six-check JSON result.
Sous les Montagnes de Fer Squats Warhammer 30k 40K
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x409233fa8a02c13ff5fe749498953f04f2b27e06d9cd55e8fe792d99edec82ff. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ62597298 — a six-check JSON result.
Les Derniers Tonnerres – Légende des Thunder Warriors - Warhammer 30K - Musique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873cd469c794f8d67f0a59b0e10c818429c86ab5ed3480e8e0b3995de5ea2839. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ62591978 — a six-check JSON result.
Bienvenue, au musée de l'Infini - Trazin - Nécron - Warhammer 40K
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86678c4151c3dd28834a2bca3c7d89052faffb750611cd23724ff50a7970a73c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ72597608 — a six-check JSON result.
Un Jour dans la Vie d’un Cadien - Astra Militarum - Cadia - Warhammer 40K
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf9fa3edeb9fcf4ea9de3b926b7b1a9453b9417676719ade01e50fc84668d63. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA62574592 — a six-check JSON result.
Souriez, Vous Êtes Jugé ‐ Inquisition - Warhammer 40K
Les Fils Pénitents de Krieg - Warhammer 40k - Death Korps de Krieg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e05e0c7e9b606219790dea7146597f9ffc0e3c3c5397d723aaab4252d913eb7. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82523626 — a six-check JSON result.
Sous La Flamme Sacrée - Warhammer 40k - Comptine Adepta Sororitas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4584f58f52612e964c6b356b8ffa98d765495d1002801f417b12f103eb82ef5. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82536574 — a six-check JSON result.
C'est Dur d'être un Dieu du Chaos ‐ Warhammer 40k - Chaos Gods
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2180cdd7000df9b2dd626f415fd7946928016cdd82f23d8750ef2aa5c457582f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82521930 — a six-check JSON result.
Sous l'Ombre Des Etoiles (Night Lords Warhammer 40K)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a512cda813d8de58d3b08ce2c74ebfc034c643be96ca37963c0b7b8f7bec18. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82523628 — a six-check JSON result.
Hymne du Mechanicus (Adeptus Mechanicus Warhammer 40K)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2918f160addd84738171c5180b851dbab962dcefd8b1b4bd93068ad638da1d7. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82523630 — a six-check JSON result.
Que Tes Cendres Deviennent Ma Guerre ‐ Warhammer Spécial Saint Valentin - 40k
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6371eeaf52c56eb535decfa374403acc45e03af336d0147b549106feb4b2b63b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82596390 — a six-check JSON result.
Sous la Hache de Khorne (World Eaters Chaos Space Marines Warhammer 40K)
L'Odyssey du Navigateur - Warhammer 40K - Musique Inspirée - Navigator
L’Hymne du Bien Suprême - T'au - Warhammer 40k - Musique Inspirée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9823090665fba2538c50085ea50c15141a0c9b10671eaa680fbce486ecb165. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB62518089 — a six-check JSON result.
Nous Sommes la Garde - Astra Militarum - Garde Impériale - Warhammer 40K - Musique Inspirée
Gloire Profanée - Chaos Knights - Warhammer 40K
Prière pour l'Empereur ‐ Imperium - Warhammer 40k - Chanson inspirée
Sous la montagne de Karaz-a-Karak ! (Warhammer Fantasy Nains)
Chant des Chevaliers de Bretonnie ‐ Warhammer Old World - Fantasy - Inspirée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9435497b2fa231710af9239f61cd478ce76588e1c6e88d9e22415d3af59dd7ac. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT6E52514805 — a six-check JSON result.