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 0x186c40be449aa0ea5d92833dcf036ad41e52a376e8dcb7401394de6bc3afb0fa. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c98cdfdb-cb5b-4f2f-b1e5-ebdc894fe04a.json and https://artists.proofprofile.net/proofs/artist/c98cdfdb-cb5b-4f2f-b1e5-ebdc894fe04a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carmen: Prelude - les Toreadors - Habanera - Danse Boheme - Chanson du Toreador
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 0x05d490312df2a40acfcd5fb3b1ff4de325c590be537680610e800a4251d741cd. 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/GBPFW1100520.
Oberek No. 1 (arr. for brass ensemble by Jarle Storløkken)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c921cb7be2e6e7bb1f5d5e87500b127b8d1f2dcc8561ecea112340f901d5301. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/NOEHX2406010.
Deux Morceaux (arr. for brass ensemble by Jarle Storløkken): I. Nocturne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276a8e5625f22f1cebe37eaeaaf3b34a56196daa2d5e5f925ad5f6d236bf42b6. 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/NOEHX2406020.
Deux Morceaux (arr. for brass ensemble by Jarle Storløkken): II. Cortège
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1254c831056726f6ffb009ecbe7b37dd7134e09ef37380e6e070ad9924a91d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/NOEHX2406030.
Adoration (arr. for brass ensemble by Jarle Storløkken)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3179e180b1865a4261c5850964685935a74913232e356ccceb0efe2c4e0bf54. 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/NOEHX2406040.
6 Lieder, Op. 1: No. 1, Schwanenlied (arr. for brass ensemble by Jarle Storløkken)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bc3c3e761bb026d6e565818cc592a2bef33bee7137596d0b61366b39278c7a. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/NOEHX2406050.
Rondeau, Op. 97 (arr. for brass ensemble by Jarle Storløkken)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af4c9e26312b710283feb40c6e616f8b19a355681bf890164cb63829229c27c. 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/NOEHX2406060.
Mazovian Dance (arr. for brass ensemble by Jarle Storløkken)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029ad8186149671383fbbee1b3d39ec623b7193e27093f8d25b633031f12bf5f. 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/NOEHX2406070.
In the Stillness (arr. for brass ensemble by Jarle Storløkken)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfb93ae3a29c4bf504a441ce52452d27791df639324235c7b3a74dd86b3d59a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/NOEHX2406080.
3 Morceaux, Op. 15 (arr. for brass ensemble by Jarle Storløkken): I. Serenade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b0f206448eb1801c7ea265345f5f9fc9ba830ecfa274f6331240e7aaf08f22. 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/NOEHX2406090.
3 Morceaux, Op. 15 (arr. for brass ensemble by Jarle Storløkken): II. Au Bal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a0778a845510da80bf0a72d7d5b1a53466508de0bbf0d5ca89844265122c35. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NOEHX2406100.
3 Morceaux, Op. 15 (arr. for brass ensemble by Jarle Storløkken): III. Humoresque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75dfebb9da064d82b6c5881ee4ff70c98a6186d70559862dc19a3926117935b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/NOEHX2406110.
Sicilienne (arr. for brass ensemble by Roger Harvey)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4a868a862d3703949ab4a19213d43bbb638c175a5c2ea185bb956892e1cb3c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NOEHX2406120.
Rissolty Rossolty (arr. for brass ensemble by Jarle Storløkken)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c2458f030d9a889605d43314dc82b115df56bd3ecf439a065825a2ee498593. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NOEHX2406130.
Share My Yoke (arr. for brass ensemble by Sebastian Haukås)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4896febd91a0eaa2a04e92bedb19b880205ece7614777e119389a32414d21b2. 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/NOEHX2406140.
Voices Sing of Immortality (arr. for brass ensemble by Jarle Storløkken)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2efdc8027e04bc52399d4c12257a1c39cca061c82838584f1b3e3220f0f0ca. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/NOEHX2406150.
Drei gemischte Chöre (arr. for brass ensemble by Jarle Storløkken): No. 1, Abendfeier in Venedig
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c098763fb434ac03f2eb40ef70c4672f0bb1092ac7cf4be05ed9d8120628fb. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NOEHX2406160.
Drei gemischte Chöre (arr. for brass ensemble by Jarle Storløkken): No. 2, Vorwärts
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1774ea80d3262ab90d98cb525180e9cc98680ab49f18ec160f64200d9f2c2f92. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/NOEHX2406170.
La toute petite s'endort (arr. for brass ensemble by Jarle Storløkken)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee319222fd04f61aef9e536a3fb1d1383f68b68b9b3d29ac67ffb4d03740677. 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/NOEHX2406180.
Piazzolla / Arr. Storløkken: Estaciónes porteñas: No. 3, Invierno porteño
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c09c0b24147496f32b3c6b519c7186720d4337ca339c279e629615ce8a84bac. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBPFW1100512.