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 0xa124633b359cccc73aba60a6d5c8ad787ba7d7c36febc30113fd99bf72f1018c. 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/8a457480-cd5a-44ed-9d3a-a0655e749448.json and https://artists.proofprofile.net/proofs/artist/8a457480-cd5a-44ed-9d3a-a0655e749448.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Four Seasons (Concerti Op.8 Nos.1-4) Spring (La Primavera) Op.8 No.1 E Major: Allegro
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 0x9c22956c76af6c2765622f0b3dc0ade4cd328d07b8f91fd65c66e2f8e38a1e49. 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/AUV401447956.
The Four Seasons (Concerti Op.8 Nos.1-4) Spring (La Primavera) Op.8 No.1 E Major: Largo E Pianissimo Sempre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2512f3e66fd266d7eb8355877996955a14dcbf66177042a1c6a3d1f671b51f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUV401447957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abfc708294e3db8e468167b8dd26761e23e6048a536f4a0546c0031a35e5c1c. 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/AUV401447958.
Summer (L'Estate) Op.8 No.2 G Minor: Allegro Non Molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80102b1666d57873c2d019c5623336ca68dbc35721a0dcad32c31fe3e218251. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUV401447959.
Summer (L'Estate) Op.8 No.2 G Minor: Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc32ce309d896fac92fd92c3569bb5992a45de26baa4f8a092af8e31d9f5f127. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUV401447960.
Summer (L'Estate) Op.8 No.2 G Minor: Presto (Tempo Impettuoso d'Estate)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca8a4b00450fc452f8f5c622b0ec3e119ebf4954b9c0f4ed86c683800a9f219. 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/AUV401447961.
Autumn (L'Automno) Op.8 No.3 Major: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feb370e2ec81ea2aac1b0e747ed78e1e68a73596a462b6f40f17a806efa9701. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUV401447962.
Autumn (L'Automno) Op.8 No.3 Major: Adagio Molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaea8af5949603a078e4dc4c4ba700c8f3d18d640fab3011c4c128cc1953b064. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUV401447963.
Autumn (L'Automno) Op.8 No.3 Major: Allegro (La Caccia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69513b6daf9dcbd9454155c7305de9eeeaec22dc38769d0560159872150f08ad. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUV401447964.
Winter (L'Inverno) Op.8 No.4 F Minor: Allegro Non Molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb433dc01d4b1429c24828511a0fca77231b612db1b326fc1866f439a223b2. 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/AUV401447965.
Winter (L'Inverno) Op.8 No.4 F Minor: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814ae459e50ea32e8a50153d2ca1f0912480812b961eb2a584d5c5d765041808. 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/AUV401447966.
Winter (L'Inverno) Op.8 No.4 F Minor: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d5a139558af901ceb2fb14571b3db7ceaad26abbc5b216e27911203778df80. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUV401447967.
Concerto Violino, Archi E Cembalo Del Ritico' E Flat RV 256: Allegro (Assai)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfadba8810e1559f85fdcc81a763d2dd80f893f8b75d01cb977970229dbc524. 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/AUV401447968.
Concerto Violino, Archi E Cembalo Del Ritico' E Flat RV 256: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13802b815562ff5406cf1b22e683487ea522a1fc560ef9ed430c45dacd96c481. 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/AUV401447969.
Concerto Violino, Archi E Cembalo Del Ritico' E Flat RV 256: Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3e4a12071833b6ba1d26477ad9e6f64b316f6632220d5fd4f3916b183d073d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUV401447970.
Concerto Per Due Violini, Archi E Cembalo B Flat Major RV 524: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428c60f12cfe7c17d9b335c52f3a5a4c0fa0b69aa7ed86d21b03c65004c90bc4. 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/AUV401447971.
Concerto Per Due Violini, Archi E Cembalo B Flat Major RV 524: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d249252dbc0b218097cb6ad1b5b9194a040d9d6f61cf7f4b4b8adaaa6d55985. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AUV401447972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f8871183c453ff3f26466e9add262659510944c2b959a56d68d13a41b922a1. 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/AUV401447973.
The Four Seasons, Op. 8, Concerto No. 1 in E Major, RV 269 "La primavera" (Spring): I. Allegro
The Greatest Classical Collection Ever: 222 All Time Favorite Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6d3d7ed7c158cd2dfa45cb00b5dd15a70b20456b32a3279f5132a19be03f46. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US4R31334358.
The Four Seasons, Op. 8, Concerto No. 4 in F Minor, RV 297 "L'inverno" (Winter): I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a238d887a617128254a30a18eabc3dd568ff9f9f81838a33d569a97161349a. 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/US4R31334361.
Violin Concerto in A Minor, Op. 3 No. 6, RV 356: I. Allegro
Classical Selection - Vivaldi: Musici di Venezia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6c19aa7e72cb3cfe24b681ae070cc8dfd9532bd1491a3375e6b3a623ee0e85. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DE0851510588.
Violin Concerto in A Minor, Op. 3 No. 6, RV 356: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a041e3e9e111a2fb2808ca47ecd025cfeda22d1a62f0b9e17dfe112f6f07eb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DE0851510589.
Violin Concerto in A Minor, Op. 3 No. 6, RV 356: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d873909ae1b52a01fcc5ff1e200e9f65a7855f95454e93f9e70a8736033662a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DE0851510590.
The Four Seasons, "La primavera" (Spring)‚ Op. 8, No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa20bdcf5df7e1b81f7d41ae744e1e15cc251c161a5160ea1677e0ac0b2decdc. 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/USZGD1680703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2850a1fcb02d920b802d7237e31f33b8dda70267b7fd5e3eb6cb62740f77c02f. 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/QMFME1460288.
The Four Seasons, Op. 8, Concerto No. 3 in F Major, RV 293 "L'autunno" (Autumn): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a03b89884cb64122b148770847026650fd53c8a72bf223f7a747c0f4e0aef6. 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/US4R31334360.
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
The Four Seasons, Op. 8, Concerto No. 4 in F Minor, RV 297 "L'inverno" (Winter): III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23eb570b0ce78d6618f80be2b6a545e2b47a92e3f2cd25d9e6e6839c843c000b. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/US4R31334362.
The Four Seasons, "L'estate" (Summer)‚ Op. 8, No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544ce4d211a83a600807afe591040568d921850a5bf648297f8ebc2dc8ff8999. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USZGD1680604.