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 0xefb8cd47ab13c726c2c43de758caa9f200537f5f59b190e9a0cc3ae7c93a35c6. 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/e0c2d08d-7367-4a85-9cbd-64a2254daaae.json and https://artists.proofprofile.net/proofs/artist/e0c2d08d-7367-4a85-9cbd-64a2254daaae.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 0xe8c4da06a41b358fae036abd5456e929bca1dfbb0d27dd620b14526d14e4b4a6. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZES72132002.
Unlock My Boss, Pt. 1 (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383ee7e27cd0ec341bd25414e1512c47d7644a3a778f4f5f1ac719df99338cd7. 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/KRMIM2304679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4514a949d648798733144fb60a976da7323279248eb1cc2594f07156624fa7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KRMIM2333451.
[THE SEASONS VolⅡ. 4] <AKMU's Long day Long night> ReːWake x Sion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4626380ab4d9cae98c18c5efa4d5cbdefa0aae2141d4905b081908bac4e5a129. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/KRA382321004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427472dd142cb7697f9dcdb8f7d047cc7f1e8eb968e5adaa2fb71b40ded0a460. 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/KRA252401953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c04630b5b70627f50211625afd96e5380e938fc9da09a8d9ccde9916543050. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:21:38Z), 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/KRA382500296.
Our Unwritten Seoul (Original Soundtrack) Part.3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1398a767cf078dab55087d5484282286c04a9b67f2da498f4caab1b583dda2d7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/KRB472200540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57118381ba28d84142016767059c58d369496d34279b3a74a30297a2a1ca8ce. 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/KRA382400385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8e7c9764050b5faf350488424acf98b792cae2a02b9125db71dbcfa78dc15a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/KRB472202314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301a6c48f810815f1ebe642afd675d312ea94c1fda32c62a2f39bb173f1e0cfc. 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/KRA492201304.
Hachiko (Feat. Sion, Yescoba, Dayoung Ahn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90099d3eda6d6990d5e3b22bc65fc8c4d2e13705a16f5334164c835c0b5a5359. 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/KRA382205626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec26d36a8edcb72aaf89e5ed775c5cb93ad01607a9d5052459df052b59473572. 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/KRMIM2333232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b7a1ee3712455fcc1184e89a6ad9e7fd78a34d2e6fadd616b77e5fb9481bf8. 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/KRA382207559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6977a340b003a0f335e606b9c121ebce662f29c7cacea37bd6d4ee6d568b0b. 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/KRA382500295.