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 0x058b5767ee0b364dc247afca37e8b23ae80f01ee42bfaf03ffa480871aa1d0da. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d55198f-ea30-4d4b-8977-5786353dbd71.json and https://artists.proofprofile.net/proofs/artist/7d55198f-ea30-4d4b-8977-5786353dbd71.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Stabat Mater In F Minor, RV 621: I. Stabat Mater dolorosa - Largo
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 0x48509dce13dfa022b3173945b51be83d19c7a41a0de733be845fef6edacbed93. 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/FRX290204140 — a six-check JSON result.
Stabat Mater In F Minor, RV 621: II. Cujus animam gementem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71721888da3f1161edea025444bf9fd01c24ffd45c93ab5d5909cf6b39f9622d. 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/FRX290204150 — a six-check JSON result.
Stabat Mater In F Minor, RV 621: III. O quam tristis - Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c78098cecfece22b66e0d7abbf4626aea7976c1aeade3cff0a366fa6d0599b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX290204160 — a six-check JSON result.
Concerto per la solennità Di San Lorenzo, RV 556 : I. Largo, Allegro molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc712062baae8c0010d7d247158d59a0d7b3f1146d68422538b5a25017b21710. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290204010 — a six-check JSON result.
Concerto per la solennità di San Lorenzo, RV 556 : II. Largo e cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0e9134ea36895dfe97941e4d5a148f34b65bc3f0d1c3622d569d99908a1391. 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/FRX290204020 — a six-check JSON result.
Concerto per la solennità di San Lorenzo, RV 556 : III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2276431d1f28456fa3a4063cb123828107defbc3afa1f05805ab804ed46a1ee. 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/FRX290204030 — a six-check JSON result.
Clarae, stellae, RV 625: I. Allegro (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58888876387bc908953a1829d85666ef9de43a433fac72abc5f4e79b2a0bc61. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290204040 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15267dc0caa7e46f09265b46786fe78d270c915f98306ffae1a0218975e1a9de. 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/FRX290204050 — a six-check JSON result.
Clarae, stellae, RV 625: III. Allegro (Aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c26524ba82473fa435b38a3bfb40d4010e7e3e4ba2bdf0a85224d5b5879fdc8. 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/FRX290204060 — a six-check JSON result.
Clarae, stellae, RV 625: IV. Allegro (Alleluia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5106429fa132dfebdc141fd54b29910b2e00c41ba64c27ced1d6007554b956. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290204070 — a six-check JSON result.
Concerto in C Major, RV 554a: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da825eb1b94e0e92b624e3131d7ef820db167c2c66edf57b2be97f2f71e24fd. 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/FRX290204080 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05bc195d921a0a12a33c956c824934ff8287d3f5ed14803d12082b2f32a5dd6. 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/FRX290204090 — a six-check JSON result.
Concerto in C Major, RV 554a: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614c4f14003c4888b1145aad9e00c2c7876412a6d52206512333318cfe482a20. 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/FRX290204100 — a six-check JSON result.
Concerto in B-Flat Major, RV 579 "Concerto funebre": I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa86cea2a3ede7f5f68c3f433b90518fe247b290d6ef90867c432b04fdcf269b. 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/FRX290204110 — a six-check JSON result.
Concerto in B-Flat Major, RV 579 "Concerto funebre": II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b654d68e4f56459e85f8aba31bfb0d27ec627ce2b6e72686588e13b228f7c09. 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/FRX290204120 — a six-check JSON result.
Concerto in B-Flat Major, RV 579 "Concerto funebre": III. Adagio - Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7877352cbd7bf9160f65e0d3a3c7e1b539e5f1011dcac14dabd5966ae51931. 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/FRX290204130 — a six-check JSON result.
Stabat Mater in F Minor, RV 621: I. Stabat Mater dolorosa. Largo
Stabat Mater in F Minor, RV 621: II. Cujus animam gementem. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71721888da3f1161edea025444bf9fd01c24ffd45c93ab5d5909cf6b39f9622d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRX290204150 — a six-check JSON result.
Stabat Mater in F Minor, RV 621: III. O quam tristis. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c78098cecfece22b66e0d7abbf4626aea7976c1aeade3cff0a366fa6d0599b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290204160 — a six-check JSON result.
Stabat Mater in F Minor, RV 621: IV. Quis est homo. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13532a9bed2533eb1134a7efcca7441399c45609e4193862633b9af0c7af75d3. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX290204170 — a six-check JSON result.