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 0x41ec45db87fecb2199b0a77ed63c09903a191b6eb329370007cf2e9cd7a0361b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fed7f0e6-7c10-4128-8138-a4d213339c94.json and https://artists.proofprofile.net/proofs/artist/fed7f0e6-7c10-4128-8138-a4d213339c94.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: Introduction
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 0xfb38ff13891dc907c04fedb62656082b3836afa5b3299de8b66b6f6f6f77f12f. 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/HKI199190501.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: Questa e la cameriera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237f972daa20b79381c25c02f45e020383b9cbbf14d53b93fd00f564e1a1ac7a. 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/HKI199190503.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: Qui verran
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db6aeea98bcdace404dca875e5ab627f86d11fe8d6e846de8dde4bd5ee5de81. 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/HKI199190504.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: Dovungue al mondo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf6760b09cbaf1bd7e36619a75326725a6f6b5320512fdf461c29ddaa4c49c9. 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/HKI199190506.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: Ler l'altro il Consolato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6a1bc79992df4b7e7fc90359c1197e176e2d359e09796ef8d48a120a2a29ef. 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/HKI199190509.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: Ecco! Son giunte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93400694d2c1e47a8ec28ba8301b5f35c34ed05bfeb6a8ddec714a01b8611bc. 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/HKI199190510.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: L'Imperial Commissario
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3ba9341fd328a1d4afc7dd221102f3f07f4c8aa04592814f730ec779710c32. 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/HKI199190513.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: E soffitto ... e pareti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9f5a4e3de3c2b64836e4d32e61461ad8f68727e3250763ca2103331a2583df. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/HKI199190502.
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
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: Quanto alla discendenza...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bb2723d42092a3f23f81b678ce898906a19b429fac8daa0b43c1a3cc70e22d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199190505.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: Ed e bella la sposa?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438f3cc519cba9af535ccc1565ee8fe29f4a46aa89d8f529e465fd7fbf0b003c. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/HKI199190507.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: Amore e grillo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0492aca4ca7e54c8b4c9f3a625d7e15b5044f3cfd871fbe064ded2ad6b2bcb6. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKI199190508.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: Gran ventura
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a8bde6e3c5cdf19645396c28e9fa2fe1e4373c40eba9456eac8c24104083db. 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/HKI199190511.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: Quanti anni avete?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a37c3c289e3e0d3dba33149fca22193be2bd8eb2bfb925f18e28741978e854. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199190512.
Madame Butterfly, 1. Akt: Vogliatemi bene (Mona Lisa): Act I: O amico fortunato!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811ccc82d0e6ce4e6cc93fac4164be53dcb133b6ded09d2c3c928b6063687c16. 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/HKI199190515.