The Orchestre Philharmonique Royal de Liège (OPRL) () is a Belgian symphony orchestra, based in Liège. The primary concert venue and administrative base of the OPRL is the Salle Philharmonique de Liè
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 0x937760d71b08e0a4d0dd2a6f32f6cfa26e6ba8209c366e04504e6f3398dce5fb. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74926ddf-1c96-4112-bcd4-60c5570a3b22.json and https://artists.proofprofile.net/proofs/artist/74926ddf-1c96-4112-bcd4-60c5570a3b22.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beethoven: Die Ruinen von Athen, Op. 113: IV. Marcia alla Turca
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 0xa625efc60dcd8153005f7bc927bdfb6a7ef4fd7e14f1c74f3a75cc265666a184. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRZ117600610.
Beethoven: Moonlight Sonata and Other Masterpieces
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa625efc60dcd8153005f7bc927bdfb6a7ef4fd7e14f1c74f3a75cc265666a184. 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/FRZ117600610.
Konzertante Symphonie In Es Dur, K 364: I. Allegro maestoso
Mozart: Violinkonzerte 1-5 (Konzertante Symphonie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91580dbf2df60ebcd04b34bdfb468b9f578ba3437db40334620f9fbcc6ae9d8e. 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/FRZ139410231.
Violinkonzert No. 1 In B Dur, K 207: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18db8f4ee949b1a4e82816390d619011b49a7825db5b490a1e9929a20b12700. 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/FRZ139410512.
Violinkonzert No. 1 In B Dur, K 207: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231ffa81c823fbbfde40ae9c82d897374d99c124a590a46c8a0e4b72aa2fceb2. 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/FRZ139410513.
Violinkonzert No. 2 In D Dur, K 211: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657a9bea4f53f4de8c500d20aea336627ba4a2fe40ad55c0fbf9d72123ef74ac. 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/FRZ139410522.
Violinkonzert No. 3 In G Dur, K 216: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127dbcd912879e536087a2de15005acfe65fb947a53781ab08b2d20af356d80d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FRZ139610181.
Violinkonzert No. 3 In G Dur, K 216: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64f53aca9d080f64edce82bdb5a34fc84087fafd291b53e9fdf8b76c8bd3d34. 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/FRZ139610182.
Violinkonzert No. 4 In D Dur, K 218: II. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4188a71020ea4c28d353b2cfa12706e79c9d186bfc7da4c421d0633da6f18a7f. 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/FRZ139610192.
Violinkonzert No. 4 In D Dur, K 218: III. Rondeau, Andante grazioso, Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b6529dbb6d741db47a315c6d402d52539833cb8d05c91ee61600cbc7e18fd8. 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/FRZ139610193.
Konzertante Symphonie In Es Dur, K 364: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb279045b5700b9a6fff1ae581b933f4b8179dfd2abdede4a3e290b32c12636. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139410232.
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
Konzertante Symphonie In Es Dur, K 364: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cefbb80a61442cfafa5c0157cbde768a72e00cddb8ddfc4b16e3438ac3fbbd6. 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/FRZ139410233.
Violinkonzert No. 1 In B Dur, K 207: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911e60f8a46a856967647a1a1dde58dad09c1eea98d20f23cc1cfecaaae11239. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FRZ139410511.
Violinkonzert No. 2 In D Dur, K 211: I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d16ceb5e326eaa04c14130203be390b082a40e73e5a5240e2fc9e8779432aa. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRZ139410521.
Violinkonzert No. 2 In D Dur, K 211: III. Rondeau, Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f67952acd12d9793be64915af8907dda91d7d1a018394be8292f96cb4e9abf. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139410523.
Violinkonzert No. 3 In G Dur, K 216: III. Rondeau, Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85694dfebadf4c061dcb088df3601a1c7fcd27c8170ce2fec5be0c360778b51a. 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/FRZ139610183.
Violinkonzert No. 4 In D Dur, K 218: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50e3e02656b3ebf0d4a097f9a653964f23ca8c3b82b10ad6cc3bfe6cedbfad8. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FRZ139610191.
Violinkonzert No. 5 In a Dur, K 219: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017bc84d2d98d953d216282e15b61e3111f2cd09124e22819bfbfba145753599. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ139410222.