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 0x1ae61c08b7297ba57abe2dc10b2a7e846130459f81e939333ef4c19494df6a6b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f181b48-c041-4e39-b09d-4ab1f26dd3fa.json and https://artists.proofprofile.net/proofs/artist/9f181b48-c041-4e39-b09d-4ab1f26dd3fa.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 0x8001c8bc28c6d0772ed34725075aa938d4405caf63be109f7bd873d4024506c7. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/USQY51712227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0df3fb2b88959b10daf627d0a25e9b246f1ff17758ea2e508dcdadd2372e5d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USQY51712226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f84fa993e084c7a0a5022f30083d1bdfee9cd7cd3bb6c760a311f40660f275. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:04:28Z), 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/USQY51712225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b42acdb7dda017a9d1f1c952668473c1f6f707e96b267b497ff8bc097e91e4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USQY51712223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00856e9835e05ba1c4deb266a8e751dc38a76f85896bf85d9b3df316935aaa95. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:35:04Z), 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/USQY51712221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3ce0491b5ceb53909ee6d349167a4d8a31716de340c270b6bece4af4364cb9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USQY51712141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc054c7e37ba4e1292f8364980645db1cd8acd9a720559e486c65df79b5fe0e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:00:10Z), 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/USQY51712140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597b54a720090d187784b68a4ee614cc68bd88dc9fe066f37354c24d8ae9343c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:30:49Z), 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/USQY51712139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cb2a75dbde332d0b5fcfe8eb228de01c511f7f1345cbf0458d986c41c61627. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USQY51712138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a3da1ac4e2425d36e79650cb2c2397233bda114f5a87821af27eb95b8a15ec. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USQY51712134.