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 0xaf8938f692d8ae4b5ae95bd37910371af285eeabc519a9869831956359e17f0c. 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/6ea80815-66ee-43d5-8beb-efb1e30c7b50.json and https://artists.proofprofile.net/proofs/artist/6ea80815-66ee-43d5-8beb-efb1e30c7b50.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 0x42254d2809c779c91239667c0dac966338ffd16d67e05d9c037e006eb9bc8f60. 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/KRC712000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919f7470e98d0adde23de0ffc92620e9854d1ee0dea5f002e0df1ce6a25fc2c5. 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/KRC081700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76b9a2fe581cd84bb113998d5b10c5006dcf0ac9bb5bcd8b92310969d39595f. 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/GBJX32175007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df14e573fd3423c12f1bb0bea68b3c90f1a7116cf59be2cefff98eb86f8b111. 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/KRA381500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcc92613d0dc5f41e2b2e2c7066d05143cd31b52dadb4365b531d95482bcd8f. 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/KRA401500637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76b9a2fe581cd84bb113998d5b10c5006dcf0ac9bb5bcd8b92310969d39595f. 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/GBJX32175007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093145b87792fffa865f3e1bafcd90ae131aee74c2aec9d68f631aaf2adb2636. 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/KRA401800136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcc92613d0dc5f41e2b2e2c7066d05143cd31b52dadb4365b531d95482bcd8f. 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/KRA401500637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8039dbd9fe16a1dfde4f0337d1d4bc920f719a443bb1ea19dd24fbc7f85e1026. 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/KRA381209973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497374e5702f3dd26bb3d0db057c3a030cf56439c57700eb58a5d3dda7d97bc8. 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/KRA381209974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19891bbaf1cf4391814a02fef91459889aa5df96a48b56b7e5b78781380c7aa. 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/KRA381209975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49587f0cbd233d94defd0600d14aeac56eb09db5b2ba6ba165a6cb9f3d1e884a. 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/KRA381209976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46258347160f766f475751b05f4b1ab1b1a4fe27c3aae5f513dcc97f34f9f5ef. 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/KRB471500550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d6e16fc7477ab9bcd5c10ce4b3d57d826ab0b936c9b85ab503c0d2f2c351d8. 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/KRA381700864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd79f27d166e8aafd4c468477a1c379b667859861429ce829ec8634a9ab9cf96. 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/KRA381700734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf873e12befc73e5d927547265a1bad98897cd0262ee5c98016d232bb00443cd4. 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/KRA401700319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb1ddee1775dbb03e31dcf9edca1db8062107665c1d38263124f8bd3bbad1c0. 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/KRNAR1600166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd593afa92675173f63b39b0257b457aab703c4dd099a266583d9fab064333057. 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/TWCR72000109.
The Way You Keep Friendship (친구와 우정을 지키는 방법 - 봄여름가을겨울 트리뷰트)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842534be14204a4f3ac40fa8dfed8b2bf2c5628cbecc7d6b2390eb715bd85808. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/KRA382407080.
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