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 0x7a17e3df158c4082a3aba0b34ba74ab83422dbac0882a52847d4b997129aa9a1. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a945234-1f9c-4e12-9a92-0b0c544fb101.json and https://artists.proofprofile.net/proofs/artist/6a945234-1f9c-4e12-9a92-0b0c544fb101.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rinaldo, HWV 7: Combatti da forte - Voice
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 0xc157e9ecfb80689efd24554a8be48a6a33c39c2d1ed7b3750780b4967914f3a5. 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/USSM17700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd77997c4bedf6fdcc422f6cc3d4a82bcba1cd82292488ae233ae35dbf38328e. 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/USSM17700084.
Rinaldo, HWV 7: Sibillar gli angui - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6fc25a614669755538f022837fee03f278a4ce6961e66c6738403be0a71e44. 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/USSM17700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa435f16ba2fbfdd7b5d21dcef9b2f7d9a5b062ebb603014d2df16fb16f1b8d. 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/USSM17700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5448912586de24bb05d71cc15d6eddd13a75e8ecffdc5f559f383c82c374ea. 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/USSM17700090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59a88bba731947dc071cd99c8e9665b30ab82eecf91b976855c0bcaf89c7c808. 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/USSM17700091.
Rinaldo, HWV 7: Scherzano sul tuo - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e8e7622a272a2559a4a431723a903afb9e4e208906ac3d5b45e7292f110f1d. 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/USSM17700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74821e4a596f6df9e6fa7aea671d75e0e7615c6020cd1d238715d33f730ded74. 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/USSM17700093.
Rinaldo, HWV 7: Ch'insolito stupore - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501b141a1cfd080b44c3f92ded1c6b6e72a4c579e64524a177de41af52ab33e7. 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/USSM17700094.
Rinaldo, HWV 7: Il Vostro maggio - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc412ad69f3de41af0df5108c7d027c3a81e26e9f023749a5f6bdc23a6e7f812. 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/USSM17700098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58bf043ab8998a3baf5a05cabbe353dab0816db7d5623587dfc9a2f01a9f8ee. 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/USSM17700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f2023765653c6ce7b743773bd7fe08b113282aec5f24b2c3fd86ef7d48646f. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM17700081.
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
Rinaldo, HWV 7: Delle nostre fatiche - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12f88233b010ba1c3b0213e34bb8a8c6758a4033d23645fedcdb794d478a2a1. 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/USSM17700082.
Rinaldo, HWV 7: Signor, che delle - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2f9f7689485e83480b7ed5022a3794cc369e209a1f34d45152d3168a4a6eaa. 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/USSM17700085.
Rinaldo, HWV 7: No, No, Che quest' - Voice
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3832391965c9fba07f7e799bb05f0b4723b8c724670a807fe9b20bf1594491f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USSM17700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e3dd2f796f8f3cfb25e9af029c6eeca423fe4cf6b67cc3cf864a238f9bdd8d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USSM17700089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd768a84e2b9054292b264fda3ad750b46fa372a29c57ded94b5ec94cc3821647. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USSM17700095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607a67d5f68e41d767f802a1c3b44b7e6c6f7d59a093806a694344c4bbf0e890. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USSM17700096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b4a3c0d95ea17f84301810eab4104e615e7d928edd7c06a5e31cd24ffe3206. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USSM17700097.