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 0xfa13cee128925703a695745f9ffc3a3d285e281bde006f57adc30f16b0dde843. 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/671ceb02-ba9a-4f99-bfe4-9ce38cf178bc.json and https://artists.proofprofile.net/proofs/artist/671ceb02-ba9a-4f99-bfe4-9ce38cf178bc.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 0xc2d95e0254f5457b93bc81c38a48889f4b91c476d910dd626ae4b890a996b12e. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEAN62001080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4eb8df2a6e3710c7a991e6e0dfcdbb0dfe99a6d116b76fcb2fa10ed43a0bd37. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEAN62001076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18e81031f945d12cc70a12061b19b7c4ae03ab42ab5d06e44a5262e78fe6d8a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEAN62001078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b94c67240d6e7623732b3bd6ed6f69ca0c47e708f6ee287fec1b58f3088eb9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEAN62001074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab1706e8e75955850474c9966d267d28287017bb32ef3f3e9926b20a046b2eae. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEAN62001077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931e19400170eae9b08150f436ad6a42708126d6df040d36a3fd771e547f8951. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEAN62001079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2599d9ba547c8132b4c550f4b98fca2869cb08421b788618d6a220b6dae10978. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/DEAN62001073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6754d2da43939291e7fd06a8ae1e8ebbd4254ba23fea3e09f0c473693ea86d4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/DEAN62401313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc26d02f5cb6536fb1824f0c3fd10f40546fa0759c5177f57a5dd939290cf6183. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEAN62401315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902e8b0fbb4c1eb777a24d5f441c1caa903872e3b89d879843374a03acbd742a. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEAN62401316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283411dffe072f99c0322a4e13bdb616e298823d64061722894896a93c802041. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEAN62401318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a2ca306376a8ad4284c1c8b1d687a446d2f59f98a5281f471af608aeb48923. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEAN62401320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94aa1bb88bbe19dc603a38dd0a188470cd0beb7086e629aeb2d6dfb42b0d51ef. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEAN62401321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6143bafc7fd2ff65c0a84b491ffd5b869aad8ba3503ebf7dcfcd933fbc566a43. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEAN62401322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7182904402be7ec2dfe77d16aac27fd58ce254ceea340400422e11ff5223f95. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEAN62401323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0943c9dcb4b00e472dbdc506406c8fa15c0916038f3d499f2c4645a831b617. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEUV42100074.