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 0xcc47ac3f0f4d08c411786fd8cdbb866b61e22f0b568950e52ad5a1c2d9fe753d. 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/c7eb2599-d05b-42f0-9321-356c1202fffe.json and https://artists.proofprofile.net/proofs/artist/c7eb2599-d05b-42f0-9321-356c1202fffe.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 0xc91f9c77238cc2ea5b0b866582121f6066b7e7faaba9cfee3b3306dd5f181212. 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/QZFZ52065819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd7d347b7bd91eaff66bbb67c769bcc9c9fc66751f76104ca38152838d0f84b. 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/QZFZ52065822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf2dc403dc26597338bf151d0a89830fc554d014fff41be66cb5a88bd798458. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZFZ52065820.
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 0x003966216f65a09627a368f84ecab4f1f7c1d33288c6fb07a4b3cab27a3b1b46. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZFZ52065821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b29249fe0a9fb56d007127931a856495dc6f58a64d7cb01ff5f5d2fb6c63fe6. 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/QZFZ52067945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31f344eb2d90dea795188544a3b26a59ee50d335a7cc4a381043c0aa31615d3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZFZ52067942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f64eca0720e896d72bee1b228f4879b268d535d4856aeb1df9ed88d7531d79. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZFZ52067943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451c9b485f84b1de9e7947890529597654a6090d57e0835a421961d921a90bb8. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZFZ52067944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca180630baedefc1d28ff3520160d6f3bff71027443d0711795958d0dcdf7614. 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/IDA141706913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086bcef9fec0c563dbdc441603106d1be3a0625012dc620888cbb2faad663376. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IDA141706918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514a05ee24f1a18028f0104ef1af1435da2f805a4ec861b3570d64acd03b6ae9. 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/IDA141802951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f37d3f52119cc0be5e7e654b5170130cc5f5a9ade992ced4a288301ac62f2ae. 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/IDA141901271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x420ada82f92452d10dff14dc10104a21700b9dabe8310760f6f56829ed3021c5. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:53:39Z), 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/IDUM72100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72f353a4587eeb0dabd7b4a51cf83a85acaaf6f6a423d435d390115e29e4543. 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/IDA142306984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0353ae9750fdd7288cd50953fc7bd36ab11b3386467d35de59fdd014bc9d04a. 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/IDA141802554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e9f2fbc9b640e59058b38326a8cd9fc5dc37fb9d11ee2fc7ad3084b06f67fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IDUM72000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaae85854cb3be5f7c1af91d99a0b81528964145dcab580f5b92ca6d5d4859c. 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/FR10S1864111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3171d01afed7789276cad55a3f555378196d87a0aa638dd9375fe282e3258a1. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/IDA431916391.