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 0xa6a60af463df8f895e76cde8d7325d4209ef880aa5dd33b48db71012ffe11945. 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/dacb507a-aeb2-47ff-9244-7e682da0831a.json and https://artists.proofprofile.net/proofs/artist/dacb507a-aeb2-47ff-9244-7e682da0831a.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 0x07267cdc6f9d076c6fd40cb75f45e0135f6f9c42e7254396fc66e3abf5d248d1. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/KRA340906116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34590dd8158766bfc953ab1fc0670cc507de894eb9b09f231feae5960898b96d. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/KRA381200925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569e8c800e96d948a084a1c226af93a8858591a2945ce22adbd8925924837b13. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/KRA341638566.
LOVE LETTER (feat.ARA,Hye Rim,Jung Hyun,Min Hyun,Dong Ho)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6e704b8bcd7c2fd6bd403f58a9b3f4fcbef87d0e7a9d7df4c35546905dd13a. 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/KRA381002309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c75061e9a75ecc91fb7cae7b8bffe6668b74198075dc82d0150e5d332d03bf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/KRA381002312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5620a2943ec602f7be046550c4e95322c5a9951d0e08906f2cea1862382bd78. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:03:32Z), 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/USA561430270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086b9431cce2e7f0ee03173b978c0ced87ed65d81f09b25f774c839950c1eb27. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/KRA341643199.