thumb|A view of the Roman Campagna from Tivoli, evening by Claude Lorrain, 1644–1645 Picturesque is an aesthetic ideal introduced into English cultural debate in 1782 by William Gilpin in Observation
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 0x5720b499674bdd9a7e2acda4e1be203504cebbe7eb3988cb77d789ee12f2b144. 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/d019c727-37e1-4b36-a8e4-1088ce413c4f.json and https://artists.proofprofile.net/proofs/artist/d019c727-37e1-4b36-a8e4-1088ce413c4f.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 0x2eb474e72adca2aea0721bb4cca02533f2aa6db13b77e34f55abe8c37365cc55. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADQ1868874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b2b0ac721dfc90e32a4d7604e8232ae8061f87e08ac29061facb958fb0baab. 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/ITH712000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a55efbae1f8031d70e92674a55000c22560e70178275a2a9cc0e83867057714. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITH712000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafe0c94fbf684af11ba0bef016fbafd43dc538815fd2f314fe8cc31f4f3f69e. 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/ITH712000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd842040563cd5225293f93401d69d0ac8a601d45a99ea2a21f0ff990baf0a21d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3X51632001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cef71792d651f9c76d2080abb70a07aef5b27de99d912608e1da700370cd441. 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/US3X51534801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75c46243538517e9b0b94cc082b5607a9b141a3e659bb293d3149b3553fa64c. 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/US3X51632003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3a73e9c86df1b89a76ddf90d00bebc97710623241344af9a967bd701871ea2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3X51534803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8cd74b8b87157e50dcc0dd2b824f0eda0ac9bed013faa2b80540fd0f5f6663. 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/US3X51632006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eb03d20939b432b6523462625492ee0d5321aa8182d6fc67912c5330bcd95c. 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/US3X51632007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2184432cf0753d88b0d592f67b2147f1123200e858338d70a9cc7c68d26d1acf. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/US3X51632009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e620ec31f2d751bcb33ba7f37ed7b59d4cff6701071c1b9d0ac4e11d48149f. 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/US3X51632011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa530d3137fed815d42104cdf97c21ab6d467e261f223364d089de127ee6849ea. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US3X51534806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefea45b45b055cb0a991249bc63fa867b2d66736d55d89798e2a75ea21e1b8a8. 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/TCAES2012380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2411255821a3050c6f4c950d1a078299db1b8e8856c82477d71b85d336753c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAED1904146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8da525aec05b08f8c8a7015c1cff82b6fc3543c00439ded2c29dd5fbdcb003. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3X51632013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cc9abee9e0d98e0253eb944d114c8677e4d2c96547c544786110aa251b9ebb. 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/TCADQ1868216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0595c1b1ba66fdef039eccf6e868e055a8320529996b9456e891de285b513388. 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/TCADQ1868885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb54a8581eb8e7ace2e057753aba42f950ca402dbaf15c714459b67d5c550730. 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/US3X51632012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3a73e9c86df1b89a76ddf90d00bebc97710623241344af9a967bd701871ea2. 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/US3X51534803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa530d3137fed815d42104cdf97c21ab6d467e261f223364d089de127ee6849ea. 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/US3X51534806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450050d465e0e908c0b7c4c0c090b5cbbef0266c3a8a26331a0266af834832d5. 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/TCACC1450258.