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 0xddb90b9ba4889d4c3f371e5999240acc90fad9871a46b8e9cae4f5ca4d4926d5. 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/a7f17185-dbd6-4de8-9ac4-80cf4149bf82.json and https://artists.proofprofile.net/proofs/artist/a7f17185-dbd6-4de8-9ac4-80cf4149bf82.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 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 0x12259bc3f91a235c1ea62a74f2c7a103c2ca995b5af9a00313b149bcfe9a09be. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ITI021300545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77f4497c71794fcc7f2b4ae6eebe44688c5a198c92d2c8f6f938352ac251a2f. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/ITI021300546.
Italian Lounge, Vol. 2 (The Most Popular Italian Songs in a Chilly Sauce)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93b6abba85fd3c3010d86334d03b9093094c859fd3650cf774b456c9a1c5097. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI021300542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073047f991b1bfb434b7289e084b66592a006401ff47e043cfcc7a4c1e4bbee6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITI021300544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb280518b5742054555d64268df7455dcaa5ba9514f93dc444f37fc095646ac74. 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/ITI021300149.
50 Italian Standards (Le più belle canzoni italiane in versione chillout)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073047f991b1bfb434b7289e084b66592a006401ff47e043cfcc7a4c1e4bbee6. 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/ITI021300544.
Italian Lounge, Vol. 3 (The Most Popular Italian Songs in a Chilly Sauce)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e0020f5f2e6b50d62db46b001d5f6b885ef02430d35c4a18f75b9605853d3c. 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/ITI021300540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93b6abba85fd3c3010d86334d03b9093094c859fd3650cf774b456c9a1c5097. 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/ITI021300542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb280518b5742054555d64268df7455dcaa5ba9514f93dc444f37fc095646ac74. 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/ITI021300149.
Il caffè italiano: Milano (Italian Lounge Espresso Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e0251bf7fc85069966d36dcf407481e5f57924e11e2467428c0f171a63bcc9. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ITI021300548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e0020f5f2e6b50d62db46b001d5f6b885ef02430d35c4a18f75b9605853d3c. 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/ITI021300540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdcaff6a198d4b868bd30056a7c680fcafdcfef15c1d47e0dbc42599c807067. 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/ITI021300547.
Italian Lounge, Vol. 4 (Beautiful Italian Songs in a Chilly Sauce)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bcac959bdc087f643c2da7d1cd16c95fcf703c154c8ddb1f8a9ed7cf3002a8. 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/ITI021300543.
Il caffè italiano: Roma (Italian Lounge Espresso Music)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073047f991b1bfb434b7289e084b66592a006401ff47e043cfcc7a4c1e4bbee6. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ITI021300544.
Bossa Italiana Vol.3 (Italian Songs In a Brazilian flavour)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca293d7b150398efdfb79bc58a79232f544158757ff327fc2bd4d99065ad1ca1. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/ITI021300147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb280518b5742054555d64268df7455dcaa5ba9514f93dc444f37fc095646ac74. 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/ITI021300149.
50 Italian Standards Volume Tre (Le più belle canzoni italiane in versione chillout)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58994a646dcebc1b910a9ba14250f7a2ef9bd37cf0b07349292f3aaef2f4df1. 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/ITI021300541.