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 0xc46fdb69d6304105f4688dd4ab99f63fd1117c39d226d710e5ebaaf5d8fb6cf7. 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/707e7b4b-5325-4227-8b92-241e3eeb6fc0.json and https://artists.proofprofile.net/proofs/artist/707e7b4b-5325-4227-8b92-241e3eeb6fc0.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 0x58226aa90b042b48b73c2444b8892600ff5cc5b9a4d5d17913b164394d58336d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCABJ1202990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3ea0df3859aac8512c01e491dd536276c372979fefd107edbb032f6a4be494. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCABJ1202991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea8d122fc56b9cbd5361ce967479c53d959a8a694370d71eb85d2e9ea9cc8e9. 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/TCABJ1202993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429a2d2490096b55c6def52dae9909b0dbf57a53f17e2e16ad6fda5199f1d555. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:30:21Z), 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/TCABJ1202994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c130b6ee548721ad61e4df6e4b86f50cef34f908fba863749c098869ed2d78. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:48:16Z), 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/TCABJ1202996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00ac1d1b9c746052f79024794f867b7a463b4c9b0aa9c8b33df1dec2a118d12. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/TCABJ1202999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afb60230a62b25b9973c1cc8d16d27eced58a30b1d6eb3eb8e70911e3a31ac0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCABJ1203000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43d9822ae7402179521b944192f17d8e8f1a1865a6615ad6bbf2f16bca18563. 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/TCACI1546378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cc9f7332ea557b54268cd0d20a56c7567b2ae1cb7c5f9c3775e7b69d3439cf. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:06:25Z), 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/TCACI1546380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8436e3981f218e20ba36e61f05da114af3018135dd65cef0801429d9de9047. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:56:21Z), 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/TCACI1546381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde51c8ddcbfce3e46a090bca275e0497472da19b5bd6aec3d5b2b2ae3f3eabe9. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:44:49Z), 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/TCACI1546384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95a1847ca01d20989fe2b781c9075b23161c63b1bb4227ae4bb7e1c485842be. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMBZ92268898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07adf5d04b23f6d744f31e3c52e4f0add7f630ef68a5891dcc0814ec666bc3d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMBZ92268897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95a1847ca01d20989fe2b781c9075b23161c63b1bb4227ae4bb7e1c485842be. 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/QMBZ92268898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb87a03accb3228a53891d9c001feee03f85b5d94e2f6b843abbc1be2e723f81. 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/QMBZ92268900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf41c7408186e6882e65774c4ca5e86118bbd609c8d7016e8edf7252109d978. 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/QMBZ92268901.