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 0x00ac8c0d7b637d0baf2fdabee47126e2d6fc4321d5484411c07a5c1284c411cc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f9e2146-a64a-4162-8209-4abdf3e3f055.json and https://artists.proofprofile.net/proofs/artist/8f9e2146-a64a-4162-8209-4abdf3e3f055.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 0xb6c7e853ca119ed5bbbd549a5785026d3661ce5cfec27a2e139df0b9847947eb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM82031554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a879b2d31e4053f9e85b6a5b643942e6d697b45420d25f7988c2e004690b954. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM82031555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8b4abfdce70b5ec643d5e9b075c677b441621893f06f9eb3d1f7cce49f6f71. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM82031557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bd8cd495405037fa5f43d37f0cb6c224a350e64c8274deddef13d8702d5afa. 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/USHM82031558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0d8e594ddc0764eb7895521d161e12795914671af9246b2476c0b876f40722. 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/USHM82031559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847acc86ae52c7bc5716988255d14bf9d3afd5a470313a6a6bc6a867fb63f675. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM82031560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84cc1bbfa48ae83b9e2f764e0281d5f0d7aea886cc37bea37cb2519b882dbe7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM82031561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5bdb2878811671efb1afc14f23cb45bf19cbfcc1ef32d05841fa3a3f464a4b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM82031563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0194cece2a2a236996c72b1a15586f03d53eb714f0dc37627d9d7d94cd6bcd. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USHM82031556.
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 0xbb5f114d4fb0be3da3f713cfadab798a7743a06e09d468162bb40964e617acad. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USHM82031562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd497997d1170780804ebb4ee105c3581fec912d08e1a0b5024802cb1e86c2384. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZKDK2106593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e47315f99e4ca75885d7f102449aeb09972fb6183d34b25f54864a67ac7c75c. 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/USHM81813563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b19b401bbe9c1799fdd2c5ed1924b698cdc6027780a9fc827619be2cbdd74b6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM81813564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0602eecfb1418c57bae8e62ae0dabfb0938e0abab3a5692a1228a4b0ece977. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM81813565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e486dfd43ab060b2705ab9dcf293846192b4bb86607ee9d7df9b27ee2c9d6e. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USHM81813566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cad8676614b74d5be5736929191f38378144c1c08c6c0d6932cca32b501a60. 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/USHM81813567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e90ea7b61f411aa07f1bcdcc2ed9bf84ffef4383d3b8cad7dde4fdaa2552a2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM81813568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347a925475ed7446aad448b524cabf881dfa4e2ff4d5db80788e92f97c1b8d60. 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/USHM81813569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab91f821cd865f35a583e5abb4d179c4794d07798e6417c17b7c9509b88f105. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZK6K2099231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3dfd70d2b4ac2621404ab07fe9795f4596bcfa10737b9e647e7fc484418eac. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USHM81813570.