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 0x9746af1cf9ca345e1f9c89eca9a151dab241b7e117f2edfe0d2defc2391f76e4. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d278ce1-11fa-400c-a072-b0ff1110de34.json and https://artists.proofprofile.net/proofs/artist/5d278ce1-11fa-400c-a072-b0ff1110de34.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 0xcfed8179a04d2f506fa15663ae9839e767d67d3b469ed5b79ac8d49621259eca. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/KRMIM2019669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f8899ba20d432330850f9221370187bf9a4e8928578d31ad617530c824f5ea. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:11:39Z), 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/KRMIM2019670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6732aa2ff656f22591ad072785301cc8ba0207515385da02a84937b0a7f38e5d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/KRMIM2019671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70d6fe87df38298d212391f3130880ae012b075bdda72bd15781fb4f5087979. 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/KRMIM2019672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f657b3ceb563be2d4bd419e5670f005a475e29525c9f70098ad08612e7b5b2d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/KRMIM2019675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ded5dc730b107c8cb91da24c745b28b79aa61fa52e7b305354911f6282bf9fa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/KRMIM2019676.
[Vol.75] You Hee yul's Sketchbook : 46th Voice 'Sketchbook X AkDanGwangChil'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49eac8c56f1ec29de6c7e3694c7ad6d120aa141ce40017bea3cf197207342704. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/KRMIM2481194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cd3d1ffb383117b9270de400ef6a395fc7caccf0d07ac9710744b3d7b02887. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/KSB022501602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0a5bbdcdaff618086045e85addbb1a9b0dd52a6caa385d85d9d14d0b456f13. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/KSB022501603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7978ccf6a28cc54a42bded7daf76396099cb52d33d5cf008cc0c955db2ec5d83. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/KSB022501604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ba5deecc80805958b66bbc9cf9c6364268e3a99bac5b55807b3dd85f9668e1. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/KSB022501605.