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 0x6782f795303dd73ea0aa45c49442ca78ccc9bdbdde6c3607dbec5db147075328. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5104ce0-eb32-4342-b527-b26d81578d6f.json and https://artists.proofprofile.net/proofs/artist/b5104ce0-eb32-4342-b527-b26d81578d6f.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 0x249a842c046f12d3aeb71305ea74b670ae83f2efc89f0dd7449f6e8564a188e2. 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/GBF077340801.
Mozart: Le nozze di Figaro, K. 492, Act 1: Aria. "Non più andrai, farfallone amoroso" (Figaro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea63dc72bfc39d85df698735954fadb2e8df0c0b7f4e6ba16668eb52b5d7db4. 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/GBAYC8704496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033fbbabf31f9e23a6cce6d77a4ef858560ff693b280ed4acb44338e3230321e. 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/GBF078130101.
Le nozze di Figaro, K. 492, Act II: Recit. Che novità!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee56268af8e38b9eb5c7250070a8571bce4a62452758cad9c6869198a3a68b9. 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/GBF078130113.
Le nozze di Figaro, K. 492, Act I: No. 1, Duet. Cinque, dieci, venti – Cosa stai misurando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f73dbaed806987f46c8286a4403d813511c2ad52612aa292273c015fb267222. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078130102.
Le nozze di Figaro, K. 492, Act I: No. 2, Duet. Se a caso madama – Or bene, ascolta, e taci
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856c9c581a6c96881a5ec63e3079fea4c590b4785ffa98fd180872436ed0b2b0. 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/GBF078130103.
Le nozze di Figaro, K. 492, Act II: No. 15, Aprite presto aprite – O guarda – Tutto è come io lasciai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41747f505aa4853f11e45de6ba5dff0d377f28f35f8b0231b1500af564fd27eb. 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/GBF078130115.
Le nozze di Figaro, K. 492, Act I: Recit. Bravo, signor padrone – No. 3, Se vuol ballare – Ed aspettaste
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273587a3d828cb438364467e994958318396d9b793e9481efad9dd79cb3076a5. 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/GBF078130104.
Le nozze di Figaro, K. 492, Act II: No. 16, Finale: d-g. Signore di fuori... Ah, signor, signor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee21fbb3991259b0e8523e6965356fcee740fef5f674125f977f74ab2ae118b8. 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/GBF078130117.
Le nozze di Figaro, K. 492, Act I: No. 5, Duet. Via resti servita – Va' là, vecchia pedante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d542a52567d2e0dc9cc287518b9d702610b6d0bb24c1cb621f7cd02b729b75. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078130106.
Le nozze di Figaro, K. 492, Act IV: No. 26, In quegli anni in cui val poco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403486ff5901e6dc23295716a12f1ffc7e506dd3a56a10564b24cb313b9ed875. 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/GBF078130128.
Le nozze di Figaro, K. 492, Act I: No. 7, Trio. Cosa sento! – Basilio, in traccia tosto – No. 8, Chorus. Giovani liete
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355b1a34ec4433bc28245aac4e7f703c91c905b62835ad3cf48facb540d8749e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBF078130108.
Le nozze di Figaro, K. 492, Act III: No. 17, Duet. Crudel! perchè finora – Recit. E perché fosti meco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e36eea917379150288a549b2d22bc026273c9ab98aaa6a7fb02c0e8c47ea84. 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/GBF078130120.
Le nozze di Figaro, K. 492, Act IV: No. 28, Giunse alfin il momento – Deh vieni, non tardar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb955b0b6f24caea14655fd4927bc68de73225cd0cb54f358bd88eb89f9e42ba9. 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/GBF078130130.
Le nozze di Figaro, K. 492, Act I: No. 10, Non più andrai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979f0396d6ed410a8a84b5c758b7e16b334c655ebb9ae6925b770388ea712d39. 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/GBF078130109.
Le nozze di Figaro, K. 492, Act III: Recit. Hai già vinta la causa! – No. 18, Vedro mentr'io sospiro – Recit. E decisa la lite
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81902e9ef3b8597ee59eec339340ca0760a7f845e38327396eb4194c0bac0e90. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBF078130121.
Le nozze di Figaro, K. 492, Act II: No. 12, Voi che sapete – Bravo! che bella voce!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb396d799b3e4c01e2c415aa17a0e85744923aceafe7c7323e080ef74d70b3500. 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/GBF078130111.
Le nozze di Figaro, K. 492, Act II: No. 13, Venite inginocchiatevi – Quante buffonerie!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bced99b7c4726f6e416d3eedccab723cf491ba7f4ee084e8b7c14c018da6caf. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBF078130112.
Le nozze di Figaro, K. 492, Act III: No. 23, Finale: a-e. Ecco la marcia, andiamo... Andate amici!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24284395cc4e1f7ab213761a20a4a6dff96cef2d4d8742cf9331997c12058d7. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078130125.
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
Flight, Act I: Down you go. Scurry down (Controller)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d684e241fa066f4a4a3f0202ffd15b4816a8e69067cc09fd688b4901b0ee93. 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/GBLWD0405807.
Flight, Act I: That's us. Is that us? (Minskman, Minskwoman, Controller, Older Woman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f590ec60ec0439764953dfe7b1c350452e427a46caed0fb3ae84aebb850b00c. 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/GBLWD0405808.
Flight, Act I: No! I don't seem able to go (Minskwoman, Minskman, Controller, Refugee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010936b67939e4bdfd8010ed0f60c99abeeea70745709b3217905b24aac8c02a. 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/GBLWD0405809.
Flight, Act II: I bought this suitcase in New York (Minskwoman, Steward, Stewardess, Bill, Refugee, Older Woman, Tina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf60ba0a9a3b631040c9270fbc9203dd6c68e2a7093ffa250c323f67b8777b4e. 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/GBLWD0405822.
Flight, Act I: What have I done? (Minskwoman, Steward, Stewardess, Bill, Tina, Older Woman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d06ec94380029bfc0b4b00e601018993c54d0aff578590184ac398ff7fcdee8. 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/GBLWD0405810.
Flight, Act III: I flew back immediately. I'm not angry (Minskman, Minskwoman, Tina, Bill, Steward)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed5aa5637b2cda051e14f63eadc336926bf098213e924bfc5cce63d2f7df6b3. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBLWD0405910.
Flight, Act II: It's quiet (Steward, Stewardess, Bill, Tina, Older Woman, Minskwoman)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88ccf34395e7fb8b1f77d73c420d13211031ad22b7fc994ba7d255e4e144a0e. 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/GBLWD0405818.