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 0x4e2071359e1e177a0c53ac95f7253ca1692f528d3c3301e81ca79c67383ebaf2. 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/7d52a3d5-e760-4367-a1dd-75ba713c2aad.json and https://artists.proofprofile.net/proofs/artist/7d52a3d5-e760-4367-a1dd-75ba713c2aad.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 0x08a170257a3126fc371d9ca310739e93835194c5fcb459191a5fff315d314878. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/TWUM72100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08930059059bb83a26a46e98b79ea8670a30fa526a3b1d43e1da96435fae04c8. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/TWUM72100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738fd09cb43958a4ab513ad7a1fa5e1ffb2a15a3c94cb0424afaa1c382cde090. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TWUM72100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01542a20691cec84afa11c00ddc4bfccf9c1e5ed11dc14ebc9b90f01a4743966. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/TWUM72100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ecf24754dce8ad9b7782697bb7455e21f42bf59f615fc8d1c892338e64e4f2. 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/TWUM72300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce2e56cb39d9c2fb26df201331bd38c97b23adc7335eea274f255b10cf7ae1e. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/TWUM72300049.
輕輕想起你 (電影《夏日的檸檬草》片尾曲)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b2a9fe0aaa79782d94ca1398591b1783ec766e4661479b816f1d1105765656. 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/TWUM72300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84d36d45583e9627ea4ff8add20454b0d05a354c78b5ca77dca928219e44415. 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/TWUM72200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84d36d45583e9627ea4ff8add20454b0d05a354c78b5ca77dca928219e44415. 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/TWUM72200071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a410ea03998c890e0312c180b786a695601fff956124f5630c5b6edebf80b72. 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/DGA0M2476250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5460e6ccdcc65d56f72bef7a4d5b37b23f0c3648ca051ffd5c7abcedd59a6bc5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA0M2476257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa510f931de0f47496dd4eb2a78b7d1a3b1252cbafb5387a7225e025c0f3d83b1. 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/TWU712400379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa510f931de0f47496dd4eb2a78b7d1a3b1252cbafb5387a7225e025c0f3d83b1. 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/TWU712400379.