Filarmonica del Teatro Comunale di Bologna
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 0xc51021a69d06273c99bc394d9c027fe85c406d7494eae6dbd503b84caaa38bb7. 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/70b23944-d2f0-4eb2-91e2-08bf9b881dd3.json and https://artists.proofprofile.net/proofs/artist/70b23944-d2f0-4eb2-91e2-08bf9b881dd3.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Lucrezia Borgia / Act II: "Il segreto per esser felici"
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 0x3ac748a7cf65ee284fd3cb305fe8c313d891c54a7b2241007cf716938e68a401. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEN960802200 — a six-check JSON result.
L'assedio di Calais / Act I: "Al mio core"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3602ecb2c77965c7224a1a5af8c0b5e4e017a2dfd461b5506568d7b2ac432a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960802210 — a six-check JSON result.
Roberto Devereux / Act I: "All'afflitto è dolce il pianto"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dac5944172b0929f7a1754e08651a2d81227f7a7af94e61fb3d905d0e98fd2. 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/DEN960802220 — a six-check JSON result.
Dom Sébastien, Roi de Portugal / Act II: "Que faire" - "Sol adoré de la patrie"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7104cdad0d12c0c29e463e5b2eba0894277eb2ae5954c45a927f182402abf680. 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/DEN960802230 — a six-check JSON result.
Adelson e Salvini / Act I: "Dopo l'oscuro nembo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb651d7193f61c9b78d43c071b707b3e6a272b70bd8f7e1e15934edecddbf0c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960802240 — a six-check JSON result.
Maria Stuarda / Act I: "Si, vuol di Francia il Rege"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb98ea53431b49a115adcfd1542be48df0560b67b50f216928fcefdab228325f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEN960802251 — a six-check JSON result.
Maria Stuarda / Act I: "Ah! quando all'ara scorgemi"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a0640cadc0a5780ee9f473d85c32e2abe163d15a3f37a26b8290041e072f72. 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/DEN960802252 — a six-check JSON result.
Maria Stuarda / Act I: "In tal giorno di contento"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa771153f66144e4f6b6ad088ce9ab0c97f21d8f16611dfa80ca38ffb2b38d3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEN960802253 — a six-check JSON result.
Maria Stuarda / Act I: "Ah! dal ciel discenda un raggio"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c90eaecd19e1d5737aba27499e231d75152e97d280ddcbd03a81ded5efeb4f. 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/DEN960802254 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb2fa17f3e81727a5e2c5a13766cf863be297641437a506d06ebdaa99bf5d5e. 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/DEN960802261 — a six-check JSON result.
Tancredi / Act I: "O patria! dolce, e ingrata patria"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7959ebd6a0075f38557116f81490a2fc17b22610d81046eab6e66ed6dafadbb6. 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/DEN960802262 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fde681e7300c50ca228bb73457a5d0658dad983131f1fe30df765c2a34c608. 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/DEN960802263 — a six-check JSON result.
Maometto II / Act 2: "In questi estremi istanti"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c7590c645fe9e4f809d8bb129daf7f5ae4e88848a1603311f54ed2f563a3b5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960802270 — a six-check JSON result.
I Capuleti e i Montecchi / Act I: "Lieto del dolce incarco"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a149d944aa00139553edfde6d7feb9c0f187cf30da6b812a6c75731fa2152e2. 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/DEN960802281 — a six-check JSON result.
I Capuleti e i Montecchi / Act I: "Ascolta, se Romeo t'uccise"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52edb12eaa93facaa2062058eb355b7a54923e46662c4d83ef822387b098edf6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEN960802282 — a six-check JSON result.
I Capuleti e i Montecchi / Act I: "Riedi al campo"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b02549b5564dcdbff71cca7bf97762f3f631301e8055d5ab5f401863de137c2. 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/DEN960802283 — a six-check JSON result.
I Capuleti e i Montecchi / Act I: "La tremenda ultrice spada"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292cbae651af53ede574a9d221a20cafaed48ea86472992092717f1bb45ce376. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEN960802284 — a six-check JSON result.
L'assedio di Calais / Act II: "Lo l'udia chiarmarmi a nome"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9da5380064cc90630c4cbbf139c2c7ce2bd1a40ac798727afa90b0381f0b8a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEN960802291 — a six-check JSON result.
L'assedio di Calais / Act II: "Suon tremendo!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1c6e2c497ee20e9045809a40034ab7f427ab8f19c84c00fa1810ce14536fe9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960802292 — a six-check JSON result.
L'assedio di Calais / Act II: "La speme un dolce palpito"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17996af630626aad980ca4d5b7f203a0a59826d0bc7d73f2162994eb9b26c35a. 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/DEN960802293 — a six-check JSON result.
I Capuleti e i Montecchi / Act II: Ella è morta, o sciagurato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765f92e635009a36d4418557119a6e55fdb70962199169bd5a2fbaf872dfedc4. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEN960802300 — a six-check JSON result.
Samson et Dalila, Op. 47, R. 288 / Act II: "Mon coeur s'ouvre à ta voix"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6859ec58022266aaf406dcbe1d8c1fd868b8189e922e63a88f3d04404dd7cf. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961201320 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb651d7193f61c9b78d43c071b707b3e6a272b70bd8f7e1e15934edecddbf0c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN960802240 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dac5944172b0929f7a1754e08651a2d81227f7a7af94e61fb3d905d0e98fd2. 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/DEN960802220 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd115347ad0d0e01df07ff072fe64154403f87f9a072a50aed235fdc4a94d57. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079110530 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0441aeff5573fb266b7b0985f8e6efafbd5402601b4921e5e9555afbcf29dfe. 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/DEN961201311 — a six-check JSON result.
La Favorite / Act 3: Oh! Mon Fernand - Excerpt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0441aeff5573fb266b7b0985f8e6efafbd5402601b4921e5e9555afbcf29dfe. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961201311 — a six-check JSON result.
I Capuleti e i Montecchi: Eccomi in lieta vesta / Act 1: Lieto del dolce incarno - La tremenda ultirce spada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c50d13f412cebbf9f07acb1674f91de081b2899435d98d25bf49e4caff86ef9. 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/DEN960802285 — a six-check JSON result.