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 0x723068a798adf0e922f9038b4493d14d9238e65a0ed012b88dccc20e910962e2. 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/6531e40f-6026-460e-8de5-67d2c2c731fe.json and https://artists.proofprofile.net/proofs/artist/6531e40f-6026-460e-8de5-67d2c2c731fe.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 0x037f0e737531454893bfb6e0c1e8c7b6fad8c520dbc8653bdede4c1100bde6f2. 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/USANG2226064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e82ec9fe4d18e5f3d7a4b1b12f0fb6a0bc8060343f93493edffd8387b416b1c. 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/QZMZ92392986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2c6fc2e153d2b73bb1e02060c38fea2092ffc1e3b280f774256ab133525769. 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/QZDQH2424636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd2c8ba16d18e9706070d0ecb84b32675e5f1144feb36b766c1d7302eec2717. 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/QZS7J2344217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2217cfe9ddc8d0aae148239956b291104952d952842b63dce34e9fb6c65c683. 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/QZS7J2368900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8ccff65923fdbec6ca40d34aabce5596a3d514976ceb900b270e056d1e2abb. 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/QZSYP2338214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477a83f6f7531d42739ddf58834ee36d8219a7b641ede5e855c43c5b3fa9bb42. 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/QZDQH2350861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf50c990a81d779ee57112bd2226fc3626b78af9deab3f21620ba9b5b69538e. 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/QZDQH2267374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1df45cb45df8e1cbdce142c681cebc66eb76f5c7f3e1ef44bd01e69cf77c14. 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/QZDQH2264565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5043a6611b548927a498b66610d2140f1e4ab272e036ac5972cbd8de2a074a. 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/SE6I32276153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff5ffa08f5dbe92ba84ba97e730ecdac74c1bae6a3f424706d0c99316e32da8. 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/CH6542100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6715aebd25621659e8834b7df710f4ae01c1691fd19f0ab7327e5c6bcefaa4. 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/USASN2000844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103e55039dbeec4cae2a3ed07098309558c0b045d78a9236c8c3bcd5fff2f295. 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/USASN2000592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1167e3b70e42510ea1b9f11b5e938cdd6f29d16f94de6c5a349b19ff5d570052. 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/QZ5AB2419569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b22b3a93bb31ac6ae25b2582f6140f9c280cb8a48a81ab59f77871fb38cfc4. 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/USANG2237361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bf5580145a0d375e546d7983e96fc0eee753ea9b3b1c79d8384f8ab48d84f8. 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/QZHZ52249012.