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 0x6f03ef8be324009d37b8a75017c21d4f14eeab2ddbd9dafa617d0bdc6774582b. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53b64037-7782-4199-b7ad-092a21e41035.json and https://artists.proofprofile.net/proofs/artist/53b64037-7782-4199-b7ad-092a21e41035.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
From the Motion Picture Soundtrack 'The Hours': The Poet Acts (Arr. For Double Bass & Piano by Dominik Wagner)
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 0xc163544c5abc2e97b8bfd2f6d7394b32a55e033062b2473a413aa3acc833b638. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DES382304007 — a six-check JSON result.
J.S. Bach: Cello Suite No. 1, BWV 1007: Sarabande
Bohemian Rhapsody (Double Bass Version Arr. By Dominik Wagner for Double Bass Quartet)
Abendlied - Arr. by Dominik Wagner for Double Bass Sextet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92f5250b42eea19714e2f031024f895bd5da07f35e0276c1f1700e1f9e9114e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335001 — a six-check JSON result.
Locus Iste - Arr. by Dominik Wagner for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daffe86bab69fb403d0d25f74a31837c4e18812e412a9bd6856129a0831bbfa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335002 — a six-check JSON result.
Christus Factus Est - Arr. by Dominik Wagner for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed0c844afe5269b49517984aef5db0ab55a07fb5628b00c40192856e955087d9. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DES382335003 — a six-check JSON result.
Violin Partita No. 2 in D Minor, BWV 1004: Chaconne, Pt. 1 - Transcr. For Double Bass by Dominik Wagner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360e6e9bba5b9d5f7662aab65fac092e04179931f757b5dc140142bcbf12b0ef. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335015 — a six-check JSON result.
Violin Partita No. 2 in D Minor, BWV 1004: Chaconne, Pt. 2 - Transcr. For Double Bass by Dominik Wagner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa143e1158f8d3f4b6ec84023b7d3600f0a4c37e60013ec5d9c0f06f27f019b37. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335016 — a six-check JSON result.
Violin Partita No. 2 in D Minor, BWV 1004: Chaconne, Pt. 3 - Transcr. For Double Bass by Dominik Wagner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed70a281c59ae35aa38e4769da1221199a62f10d1ef3b2e7fcce8f2fc75c155. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335017 — a six-check JSON result.
Symphony No. 9, Op. 95, 2nd movement: Largo - Arr. by Dominik Wagner for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb288d9e5f0f7cc3ebba9c081c34a86b53a020c20228d556e2b5000cd21f2c230. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DES382335018 — a six-check JSON result.
Symphony No. 9, Op. 95, 2nd movement: Un Poco Piu Mosso - Arr. by Dominik Wagner for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48b9af3f9d3bcd3253bd2fba2f8a7bcfb2c6515c26b9f6f9613a29debff6864. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335019 — a six-check JSON result.
Adagio for Strings - Arr. By Dominik Wagner for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a8f8e61afe7351d07857951919f28fc046ba29d71a680dd3ee043e6a700f70. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335005 — a six-check JSON result.
Cello Suite No. 1 in G Major, BWV 1007: I. Prelude - Transcr. For Double Bass by Dominik Wagner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355630012960f51201caf9a6ebb97df41648c7de4557d5d300b79f2831455ffc. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335007 — a six-check JSON result.
Cello Suite No. 1 in G Major, BWV 1007: III. Courante - Transcr. For Double Bass by Dominik Wagner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea909093a8e31396bf4b6c4ab5b2a83b4397d60a7486cc232fcdc8b5b09ad9d. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335009 — a six-check JSON result.
Cello Suite No. 1 in G Major, BWV 1007: IV. Sarabande - Transcr. For Double Bass by Dominik Wagner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb76c93e57c9a7dab63f6b58ad03fa2a0886f7fd419f973c85da9eff9af3b344. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335010 — a six-check JSON result.
Cello Suite No. 1 in G Major, BWV 1007: V.-VI. Menuett 1 & 2 - Transcr. For Double Bass by Dominik Wagner
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35eef9dc10bb4376054b5ef3d2816aff427592cb8580e2d5910d4814a84d4508. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335011 — a six-check JSON result.
Bohemian Rhapsody - Double Bass Version Arr. By Dominik Wagner for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7988369012fa1b50dae4781893a0f714d68e49f927f0008a9ce8c225878298fc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335013 — a six-check JSON result.
The Final Countdown - Double Bass Version Arr. By Johan Strindberg for Double Bass Quartet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b8246ff1bb103ca14569f5a2a2dfc2f61a9fbcaea94ada21e53a5fd3056e64. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES382335014 — a six-check JSON result.
Bach, Bologne, Previn, Vivaldi, Williams
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04870c3f0746a9278a31fbbaae8fa9d7b49579fd7c80bb06c34b2ef4d9cc3dcd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962302591 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76223422862e5e61fe798e71854e524d4ce1ec30c658f763d61bcbaa3ca08a5f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962302592 — a six-check JSON result.
Nonet: IIb. Interlude. Moderat, tempo ad lib.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568dda71f4ad3a2b08069ba94df6ed9407839d8698d6ca7102cf6c7919e0736a. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962302593 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f450a2d9ac9bab840c811e30219dbf5de6bb2c12c488f51a030be58cb1d151. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962302594 — a six-check JSON result.