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 0xd9d77ebfce706d9e486fd7c2131c08332af1371808ade662cb77f06107d9607c. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ef20556-46be-431e-af83-3c09629be5b8.json and https://artists.proofprofile.net/proofs/artist/5ef20556-46be-431e-af83-3c09629be5b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Donizetti: Lucia di Lammermoor, Act 1: "Cruda, funesta smania" (Enrico, Normanno, Raimondo)
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 0x4e596349643d66e8207d738a999cfaf67e0bc3101b8175fd44c6767773e19fd7. 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/GBAYC1402589.
Donizetti: Lucia di Lammermoor, Act 1: "Ancor non giunse!" (Lucia, Alisa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1e1f64649108a60c05acbbed03289fbbd089671e4c83c6e6130a8f18b29152. 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/GBAYC1402592.
Donizetti: Lucia di Lammermoor, Act 1: "Regnava nel silenzio" (Lucia, Alisa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade9a9407f8aeb77d21b0440dc71f943435ebc45fd54d93b11c2c930dea086b1. 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/GBAYC1402593.
Donizetti: Lucia di Lammermoor, Act 1: "Quando rapito in estasi" (Lucia, Alisa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23540a2483032f9585db0ffcdfdb346be612ec2662674c4741ba127707291ecf. 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/GBAYC1402594.
Donizetti: Lucia di Lammermoor, Act 1: "Egli s'avanza" (Alisa, Edgardo, Lucia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47bdf10267f00bc86ef7e8fbfe55588de343f867f3bd8e058b2863203808bdae. 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/GBAYC1402595.
Donizetti: Lucia di Lammermoor, Act 1: "Sulla tomba che rinserra" (Edgardo, Lucia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413bed5abad21d99112d93e8d1f4ace223900f3bbc408a9ed700e618059227c0. 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/GBAYC1402596.
Donizetti: Lucia di Lammermoor, Act 2: "Soffriva nel pianto" (Lucia, Enrico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59675f7de77126f5d09a5e178e1af9868489e60e4d9d41ea11b1864ef5c0bb3. 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/GBAYC1402600.
Donizetti: Lucia di Lammermoor, Act 2: "Per te d'immenso giubilo" (Chorus, Arturo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957196346ed1ef24ac12ced61eec8ab723401510272baad3155485d8717e34e2. 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/GBAYC1402606.
Donizetti: Lucia di Lammermoor, Act 1: Preludio - "Percorrete le spiagge vicine" (Normanno, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb044d002b8d1d7de18cd036f2b972cd1ab607520433b2cd77730486088a02f3a. 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/GBAYC1402587.
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
Donizetti: Lucia di Lammermoor, Act 1: "Tu sei turbato!" (Normanno, Enrico, Raimondo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6cf9818b2d1452a5480dcb27a099f38d2641af7753245d744b5112b1f90c52. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBAYC1402588.
Donizetti: Lucia di Lammermoor, Act 1: "Il tuo dubbio è omai certezza" (Chorus, Normanno, Enrico, Raimondo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d54d9c0a7886dc360815651d2f2d58e865ed1de83f26bb3a7953713279ad08. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBAYC1402590.
Donizetti: Lucia di Lammermoor, Act 1: "La pietade in suo favore" (Enrico, Raimondo, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3465505fea7d051ac6eb08070a30efdf2678e4c12235241de9765b3d867568e. 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/GBAYC1402591.
Donizetti: Lucia di Lammermoor, Act 1: "Qui di sposa eterna fede... Verranno a te sull'aure" (Edgardo, Lucia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec9616d49e6579bf1221aa23b8e47ee4512115958a59c32e5967fbf2e5069b7. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBAYC1402597.
Donizetti: Lucia di Lammermoor, Act 2: "Lucia fra poco a te verrà" (Normanno, Enrico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61da70c9ae0d0d1c7f458a533e78b30a967793f3c28e236988efab10ca21dff. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAYC1402598.
Donizetti: Lucia di Lammermoor, Act 2: "Appressati, Lucia... Il pallor funesto, orrendo" (Enrico, Lucia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b1c536a3e8c4524040b9fc74be62c78ebeae2c794fc9ec7d6bb9288689061b. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/GBAYC1402599.
Donizetti: Lucia di Lammermoor, Act 2: "Che fia?" (Lucia, Enrico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffb23ae6533702b4b40f0364113e15de7d0d09931bea9f90c1b2209d4fa48f1. 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/GBAYC1402601.
Donizetti: Lucia di Lammermoor, Act 2: "Se tradirmi tu potrai" (Enrico, Lucia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8afd4ecd1aef5ab208fb98440e9de487a52b32f4b18349841e194458ce40a2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1402602.
Donizetti: Lucia di Lammermoor, Act 2: "Ebben? Di tua speranza" (Lucia, Raimondo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a56dab2f038223cd460e1eaff287c4c93edcfab6c4a27ab59795173275d38f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBAYC1402603.
Donizetti: Lucia di Lammermoor, Act 2: "Ah! cedi, cedi" (Raimondo, Lucia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec054745973e005bc4e07e3b43b9dd8dab3f475781e4827622f6449fde5ef14. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBAYC1402604.
Donizetti: Lucia di Lammermoor, Act 2: "Al ben de' tuoi qual vittima" (Raimondo, Lucia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc95a94498cb2eaeeeceb764e5ff1112b9889b1a8cd9e6774dedb9262ae6a22. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1402605.