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 0x96b1cd989cd3b7c0f94e67c9d621d099186790d5511f12d2b6b137c63f6e9955. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff15e764-2728-411c-b512-5879c1c2012e.json and https://artists.proofprofile.net/proofs/artist/ff15e764-2728-411c-b512-5879c1c2012e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2372d27d44d362acf63cbdc0fb963e173ff8cb37447a1ffb2cdec5dba4ee31. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:52:07Z), 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/TCACL1689153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd60cad11290a80c84b58618ff88e8785a5e4d7343eaf505e0aa726d0895b90. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCACL1689157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3452273500dc3878c2dff7434ff100c07e09d0c0bd6b3e3597e3d4f4a88b03. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCACL1689167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eefa70c7096bb4df7852f2b134ef15001d0263b1a9e05ece054da1e13aa3047. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/TCACL1689168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ebf7f0b2b69724d9f5e7700464f43eeccd9c1babd82b328dbc9eb69f89566d6. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCACL1689169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd098b5513682ec8ab7bc06974f690603503ed74fa3abbcb5777484b09f9dcdc5. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEPI81701727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144532fa8bafdd01cf6bc2f3af86213526ce23ea6f788657c617599e700337f9. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/DEPI81701729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4439fa930437d81d7c5df42913f016a1b9fb590be30da4621bed9f202b7a40d2. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEPI81701731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246ffd17496261d9414873fdc9ffeeb73540f367fedd9627bbc40cade7fa6d88. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPI81701733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac43766b938add4e7f1cd03392fa6ed93c65ea74d29cb3d2886008fd71828924. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEPI81701734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22973edbcaf42827ad6f84f71f8a36013c5a933ceb9cf7cc5d22a97949e2ed3e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEPI81701735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bbc46b09486eb836e6d1aadf99eb68bef9e7b43b6f9b5c18db5f90bafa787f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEPI81701736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1719c5cd0aa093f64e9a67eac44719a9987635a903248d66be2e6e73122f1b. 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/TCAEK1904471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c5b95d9cc9ecd02f6dabe7e120428d91c58d01836a1e8be909424a92cada2b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCAEK1904477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707bbfb779da7b0e14d56f2d730db6d290de6ff88821fab389108391f2233249. 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/QM6P41851849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2537e2b58889139f44f3ac6b4e4ad2f9bb951a50c6d8580c57c8d2a88811c2fa. 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/QM6P41851851.