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 0x60d801eb7b62764576aeef59b9d608bddca014d68aeac196facdb469013828ec. 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/fe8afdbe-10b5-46de-ab2f-c5dc8672789a.json and https://artists.proofprofile.net/proofs/artist/fe8afdbe-10b5-46de-ab2f-c5dc8672789a.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 0x3281d270a4121abf46d25de5eb93503164931c91e829eab3b6441905b00bb171. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAW2234538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17471684acbf74915cda6d355d7faa5f176235abb364087aed10489b6ea7d5f. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:21:45Z), 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/QZHN72358156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f90fd805ab50c89134e51cc5fa19765974a6d2bdc6e73410b02e22ddcf685fb. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:29:57Z), 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/QZTAS2312009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7704cc15471584b1669ee4a43dae86d6140381e40e9fbbb30d28c5cef7dbdb61. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZES92481193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf0b994e562542128dda557b75f93cf0a1e745ce4b2a013cb359d043aaedc3d. 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/QZTB92428866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacbc44321bb2bfffbf4e98a2c05d2f54f45fe3a6dcad4d2ad41dc9c2b06b975. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFG2482221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe110b8e6889950dcc6f40e9de3524754cf09027924c08d5abecfa80a2acd0124. 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/QZZ782477400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bbd00c7019ee115cec37829c21cbfaafae178dabeb7433657c27b96de83742. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTB92487931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48384ad183efbae63a81933bac1402788bd8acedfa0e60f3792dc5857a68af18. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:08:39Z), 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/QZK6N2592723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc495fb8b77dfc9925977b72071ef94ff4eacf894865fd7c161298ef05c7d46. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:34:52Z), 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/QZHN52589422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bbd00c7019ee115cec37829c21cbfaafae178dabeb7433657c27b96de83742. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZTB92487931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7704cc15471584b1669ee4a43dae86d6140381e40e9fbbb30d28c5cef7dbdb61. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:20:18Z), 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/QZES92481193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcda6ed3b136595f9a654917bc4be0edb1bbce4011c6aabf0248f3083cef352. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:39Z), 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/QZK6N2592727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698b4bc936553f501cb73c608b5382ed06c1e87e6f4c0f149076fdf9975a0228. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZHNA2438030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5c6ca51f72f9b767c2b12e1203fcd7a927618380465ae86b4f862e82541e5e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZK6N2592728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a720d4706a494a120ae0df377079b5ee47e52b6baa0e87e3adcbac1a01058d4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFF2562379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d30ad81063b82643cc78d371fd290c22159d3dc8d8a916981828fc03b8a1b4e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ792504106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c63bb2cfb0ca2925be12d7370f6b65ed21debbb20dd87dc4e898f9966be150. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZZ7L2578537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcbcdf6cc1cbc1a14c2c029a9c19d776dd48199ca2186ca0b509f10e36bd84b. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QT3F62572837.