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 0xcc09b9ceed271d528eac9a8b7529867dec7bb3e707fcca696422ba7104b3960a. 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/31ce24b9-e970-422b-826b-060d293e5819.json and https://artists.proofprofile.net/proofs/artist/31ce24b9-e970-422b-826b-060d293e5819.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 0x53b196910b8a6bda548d9edccd6d1464b283a4dde14d60085391f4059c97b2c9. 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/FR9W12145270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9630b5658b2fe12dc04321045c7374ad3e911e3c42219398196d503db05e84. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:02:03Z), 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/FR9W12214041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3dca623a3f437007439f742202a03bbb536f230c6d9c75fee2c572b4c6542b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR9W12241615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b4943c8ba8b2fe8cbc744391e4c18e8cefc3c8f40ee10d557e59556cb6d08d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR9W12241613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d89ba3c5fcde5fd35a7897388e7c894143af44a5e5a1059b2047df12acfb40. 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/FR9W12241614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c5dc54a71df5cb338ecab8d4066316c2d2710c3e447ad366fc1db3a561e857. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/FRE0D2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf670cf6bac10e2602332031204c129950d009eec55cfe639619975f2d68f0e41. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRE0D2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8acb659ab7cbd0ed0cc7a3b8732242e789ba2f2da4844dbecf8804f16ebcc03. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:14:43Z), 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/TCAHN2372424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06355d9854b9b1e4dcc12a26efe4aa4b9bdae0572eda73bc6489c8b9539d3f2c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FRE0D2300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54f07d33699c1b7f3e9a6a118f09475326f811ab846dbdd58ebdab2134ce6da. 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/FRE0D2300100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5456eb08610d4f974a56ca6453a4a016e9706a03119d9cc573cf33aa9328073a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:29:41Z), 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/FRE0D2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b8ac88c2f2f01e934a7210ed20b3a37fe7381215ac6017e5a67730d0b04bf3. 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/FRE0D2300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d43c761270d28bfa65cae57d079cf49e3af4fa7e1c5881e32d3e0c972599c09. 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/FRE0D2300130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166f025a770546f99dce509edb25697b14f64915c594fb70f044a36adb3758bb. 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/FRE0D2300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fee0df09f860182fdf672bd1a07146e1e855832256c5ffd39eac8b67541a603. 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/FRE0D2300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df131f41629b05df26f80c6a0c71df3c2a03b7e753a56341303fa37487323ee. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/FRE0D2300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe570ef7353db5fcfa3c7e74db4cd0a1803e36fec9e8d3fa54b2caf4d4f4df85. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJZ2550325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaa649968bc33ae7ac4b33439dac3f727940e28fea2446bc3cd3e4fcd2e4caf. 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/QT65X2569504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17fd645996f3f63327d81298e6297ad4ca4bad86ec6e06c40cde153a9697b34. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CAF661900840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d80f19013bf072e2ea91a90832d0474c8439866753b0d193ff1d125b65efe55. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR6Q11500126.
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