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 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 0x082090638e5c247e6c7b228a021f4c3a79cd04af57bdb749133c9de4c0fdfbc1. 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/056ee2e1-1016-402f-9419-4edbeb84ae72.json and https://artists.proofprofile.net/proofs/artist/056ee2e1-1016-402f-9419-4edbeb84ae72.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 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 0x05ed899a3b578b33b4e39005f7c415388fab0e3c267d59cc1d0a80c3927a0c3d. 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/KRE701900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710eb0b081b05e2c8213ce67767c1241f1f55a189dcca0704742edb9222b3071. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/KRE701900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c62f4cf8a48b2b31741fc1f9dc6d303efc839d12e27fd015570c5e326ba527d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/KRE702000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6fb1a9f5918ba127a49c122894396cd538b13195b24f3fd24aa8d59212f482. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KRE702000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4294aad17186a8c10692a3bf2dc1e5c0a335c54ef5a1cc5068185717e6805cdd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/KRE701900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab98b8ca3b9e3e0b47c0742a5311489d80dda1cb13f5aab0ab0d78c5bc6c6b3f. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/KRE702000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19223219ef13afa3eccd70840e9608bfd6a71c8788e1d1fc6dda599636c7520e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRE702000024.
장덕 Tribute Project Vol. 1 - After You've Gone
After You've Gone [from "Jang Deok Tribute Project Vol. 1"]
Yeah Yeah [from "Jang Deok Tribute Project Vol. 3"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd849bd91f889f611e8da1d9bde2453910b05a8b7301298d6a35634cfe9aa4d64. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/KRE702100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde34644e39fcd9a19fea7818aca47960fd6914c68b47e8b07074a2770bb4e142. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/KRE702100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede8b8f1839ce5b4af161f1b78eb768175137249dfeab88eace8fbe691e2a492. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/KRE702100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081646f187151705c74e98238a3134d73c96ec796cd85ac4a486595003c2ab37. 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/JPH492201113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea63f47dff0039151f7ee081f05ed198a4afd40eb70ef490c9a1c783f4796a15. 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/KRE702200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb72874a2a562b72cf8d48d435f8e407374b3143d5cc4b82fc7ac3baecb63e20. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/KRE702300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d2e828833dff2ca1890e6b28d5bb7a28ff9bc49df1bc86456ad6404cc9f9ce. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/KRE702300099.