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 0x4061573030fddae54c1bfb575e4d7778cd559cb71e942ed7c504f93b9977ac5c. 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/648104ad-c052-4c12-ac9d-eee2e2066bc2.json and https://artists.proofprofile.net/proofs/artist/648104ad-c052-4c12-ac9d-eee2e2066bc2.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 0x81cbf9dbca65857b0c871268338753d885b24466c9bd487a0585bdf3a9ea9726. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNUM72300204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0071f0b4c476544ea0eaf204c45dda20d075953b101ecaf57a42cd835db2affc. 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/CNUM72300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0071f0b4c476544ea0eaf204c45dda20d075953b101ecaf57a42cd835db2affc. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CNUM72300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0071f0b4c476544ea0eaf204c45dda20d075953b101ecaf57a42cd835db2affc. 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/CNUM72300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa140e87579553e504277990df21df36bb4e2f7e1eceea8a841628ae71dee2822. 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/TWO132317201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0071f0b4c476544ea0eaf204c45dda20d075953b101ecaf57a42cd835db2affc. 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/CNUM72300085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0099064a0681bbe5656e750d6833b6d2a3b7c93971ddde93b1ac974de88554. 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/CNZ782300489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fab78cd1a59c9ac74226710a8777287faf8d0123deed59659d004fa0e25bd12. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNZ642200046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f66b4068f420200c52dc0ddd00c91b9e21683f78a4a31f3e0e187f6a5243481. 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/CNZ642200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688a09269e2e8371fc0993bc2cfbee553feb386b55d338e508c44f98eb1131da. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:47:38Z), 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/CNZ642200045.
半句再見 - From "At Café 6" / Main Theme Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3617f126e7d3a66f727c49400ec30f3df3caa6d7fe74b176f80df741bfd63981. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TWUM71600027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7922a11b9bc9b1e28853cb31d75a7b500f6d1afc90cb734dd3555fe25045d2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNUM72100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94719272baac7e6c7b648f88ecc39a32aa0880205c493b9016301f25d45c7b2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKUM71200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401426825bda5d642663924c9331df8cdaddd1469babd0d5315f418599fed8aa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWUM72000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1977eca1404794c610d5061ced406cca499f0faffe87ce1531becbb78eee523. 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/HKUM71200525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcade3febd3606fc7802b08635de824b3936eba4d6ad4124a39e0c0b0e70bc19c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HKG070330011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d545c09978d5b9f219031d6e936c7b25bdf54954f59e30e0ea80344d522fc4e. 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/QNSM12404121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9eec591d22ed129cee80096e9684767cff50849b5e170f4b385cb304a80beca. 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/QNSM12404123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8106464560996d632ccaa3c8214211988000d8b261ad768792a8a3cb2f1307. 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/QNSM12404125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f73488645f5861b53c1e7d2a5c113aff0de9b81481be4698e5ba4eebd391eed. 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/QNSM12404128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a089e028dbeb831a1f0a2e92291a61a43886849015eb5eaa0d52b9e9681c00. 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/QNSM12404132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22b8547c58a15865a991808aa4dcec670680e5a7f276522e755a192af9a8879. 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/QNSM12404134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1faf9226d20f562e436ff8ecaffb11a3e13063093767ef0ee264d214d21e237b. 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/QNSM12404137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80249647b498bba2c993c2308c2290d78efcdb4445222065822a8f79d9e45a4. 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/QNSM12404144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec5e6c7c499505d8a866da45c304ee9cd83ce0e9a6bf9bd86bed902867f737e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QNSM12404122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c28a83a712c3c689e1ddc9336dbf2409ea000e969018843b467a725d654f285. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QNSM12404124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0071f0b4c476544ea0eaf204c45dda20d075953b101ecaf57a42cd835db2affc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CNUM72300085.