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 0x770571663d9c80d229ec40ffe3306f6cc9e25cdc19c14e5c9cc8c8edd8c0d97f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70b80001-aacd-4fd2-8f00-5344d4403acc.json and https://artists.proofprofile.net/proofs/artist/70b80001-aacd-4fd2-8f00-5344d4403acc.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 0xa5169e32250ab1447ae100c4a63c10528eca2e7b1e03e1a4282d06a40453e935. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ9000401.
Marsk Stigs döttrar (utdrag): En dryckesstuga invid kyrkan i Oslo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbda003462d6db827a16df301527cfc45aa764ac1c4439930a10cddd16d07ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ9000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912e6274d89293a4e0ff2e6a41ed6f847253632be82bf7e56b25fbe39388bfd2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ9000403.
Marsk Stigs döttrar (utdrag): Samma plats i Oslo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57e08d087de678f751be3da0174ac116d5e2c9438191ca785c4af97c8deb37b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ9000404.
Marsk Stigs döttrar (utdrag): Bannlysningen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4055beef19e8a1d62395db55ee084ba78c6fd56b3d8b443b5db9a41c3f59bcbc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ9000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49676082cf152a810cc5d68c9f8c26d53167cdf7611c440a84ac756a1f347dd1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ9000407.
Marsk Stigs döttrar (utdrag): Entre Akt före akt III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97261c2e5dfd049c4b34bbb0d569391f9a39c7e5503af71edfa17e451f57c3be. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ9000408.
Marsk Stigs döttrar (utdrag): Entre Akt. Springdans
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec359720af80f614596ec7c6e9c7f9d3cf65a492c7c439f0c01072220ea6e928. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ9000410.
Marsk Stigs döttrar (utdrag): En öppen plats i skogen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b49c5a05a837302ba0db5bd152a3ee30541806e22fa0a1c9f343959b1191cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ9000411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7dfabf14e59b0316c68de0c80a1a1aa7d51e8a63e69a883f3f052306475ce1. 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/DES380017021.
10 Pieces, Op. 12: No. 7, Prelude in C Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7117e00e8ac774f5f74628010e06c56ecf4e7b46e8b846b5506a6d3325c355. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DES380017022.
Violin Concerto in D Major, Op. 9: II. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2febee8232493e810b40042c68c6115f92e8ef0dca982578325e3aff065cd05d. 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/DES380008016.
Variations Op. 36: Je suis encore dans mon printemps
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1646206218514585acd6dc47def3d035862afc5138e5aa4f580dc986b828d0. 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/DES380017023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe549063b14675358e31574c9b3f981192eacbd4fd3df697a2eeb598bf86f602. 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/DES380732016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310c023927a8982c80b34915ffc1745b6963790d0141140f4aa1805c5ea694f2. 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/DES380017025.
Concerto for Flute and Harp in C Major, KV. 299: II. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec106cf4c9c8b2f6f69087574abe3379fa3953e0b14ff79f5b56c140e137d6b0. 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/DES380007119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb419e803fc064e7d4d68bf5187345b8cdd6c691b88ef95063ae2761e97985af6. Chain 2 (Bitcoin): anchored in block 957013 (2026-07-07T08:31:11Z), 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/DES380017029.
Harp Concerto in C Major: III. Rondo: Allegro agitato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be4476ff69e1ecc638d06e01476586f6f363acd8019d7c7857517c8b6cea4de. 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/DES380006019.
The Mother, Op. 41, FS 94: The Fog is Lifting
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a56d5da7906f8b2ee300f37e27fc687e519a9fe15bce094567c69bbb746884. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DES380017030.
Sonata for Flute, Viola and Harp: III. Finale: Allegro moderato ma risoluto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48653a1f9e3491af3d59f3c360c9b0407f281d063916bad0af4817f036a744ee. 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/DES380009692.
Violin Concerto in D Major, Op. 9: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3adb29b1e7f4bd042476bbfedc21496de6affa005b2c1f2a5407a2ef2dea92. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380008015.
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
Violin Concerto in D Major, Op. 9: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf292c3a4f5f75cfd926cc3be789858683340139802df18b1c25b5b3d6b92fe9c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DES380008017.
Tubin: Symphony No. 7, Estonian Dance Suite & Music for Strings
Hallén: Harald Viking - Toteninsel - Schwedische Rhapsodie Nr.2
Barbecue Classics: Relaxed Classics for a Summer Party
Buttner: Heroic Overture - Symphony No. 4 in B Minor
Eduard Franck: Orchesterwerke (Orchestral Works)
Haydn, M.: Symphonies in C Major / E-Flat Major / B-Flat Major / D Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5559a5350fce17b39bb01cf2faef48c9120ba1c81878e318011a21185e181112. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ8900301.
Antonius och Cleopatra, Op. 57 (utdrag): Uvertyr
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79f1d8db43e3ae9c91953ec466420894340c0b8d955b55ca405478c9d536362. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ8900302.
Stråkkvartett i a-moll, Op. 65 (utdrag): Andante sostenuto e cantabile - Arr. för stråkorkester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e64e6cfd2569ee62ee6cc52605e9f38b1df002c2ab69f21b94568d951638c4b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ8900303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032a0e524bc03f7a1b136d5e04af272ff2f447b7cc51eba9991bb04e36662096. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE2LQ8900304.