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 0x9a2b4bd77d17b2f86beb6a004b9b0e03692d67dc3ee96f72f67a1b86e0adfe2c. 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/9a3de6f4-9b2e-4225-aa5e-f88c04ce77d9.json and https://artists.proofprofile.net/proofs/artist/9a3de6f4-9b2e-4225-aa5e-f88c04ce77d9.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 0xf8be69c3b59168c51b2b6f1a947a17985d5063394b03619ce236c369ef6e669f. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/TCJPK2037702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10433f1e3ec4f900c1544cad762ae5d0c78719679c246c5cf31ab5fb440c31ea. 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/TCJPK2037704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964804d2d2e3c165dfcc09918dfc8186229dd0ba5229b741ebdb8e6c22ac44a3. 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/TCJPK2037710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cb43d224853d7842bfea2884d9b7e11d127e7baf406f9e6acd89c29a572d4c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCJPK2037718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141d95867a0c725fe217a814c54150bd7eaaaaea384e55b9822557bd9b981535. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TCJPW2337074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9055066e47b4a6f274fa7bb469b063cbc797e8f4ac140889b9a9534784adb6d5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCJPW2337078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e8b0f295e9376a12052bd77db338f28f0dfa0e41fc7d539904a1ff72db4a47. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPW2337080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c8b443e7479a0c6b374dc3d5a9f2748f376cc1154dd30646eb96ab61799d15. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPT2282248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06583de3b18b6abd092c81e655ac7cc343b91b84462f92ec95d67491f87e3714. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCJPT2282760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28aff89f85e3b3811f35649f7204ce14df762215fd4994e0c5a1bcd62da3eaca. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/TCJPT2282768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0cfaa7c8bf5174c36828a693f8a4912a0466e8b9d6d3aff0eeb813be6b9af7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCJPT2283072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a83c140e44dd320a88ee291b3550d6763ef1e93b8938ec9efc2471ebdbd134. 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/TCJPX2313792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0797ddf8b0277cd139df9d0dfd8b734cd9868b2dab00429f672d9add5f3cb4. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/JP92N2382986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ff5354b9eb979b27a47156f10f60e7655d2dc903b2dc93b9d9d01198f7698e. 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/JP92N2439010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb3daf2a753b6f80f776e01ad7beb92284b79bbe7fe450fc766a75a81879536. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCJPB2473149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5584a1245f3d6c411326117c5f0526a7aba022a29a184ef0a705577530867f86. 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/JP92N2445581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2606b1b528997bf11e21480f6b2b99c0007d1c739ce5ebdf267e5f01813e1c. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/TCJPC2493630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf97efdba990072d5b746a232264a4ded29575723241ed6b2a97360c3901a134. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TCJPC2493638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce1dd513b3a7605f18375f7e65a612b1be5d716921284efd258f9560479c5f2. 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/TCJPE2542399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32e108f755f321327185a0915c6d691583b388853dedebf625b103aee0e1da3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JP92N2519978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2163d6c05ae90b8973b7916169989176a27a96220398e88ccea416006db5d781. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/JP92N2543303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413317f39cf6f4dac7f455c35b3b276f9340f3c4d59a5c78dfe5df7941d279c0. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QT66K2558110.