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 0xdee3ad50c5b482c89d4835238369c70b471b489f38889623db510aed18f4e9c1. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd0286ca-2991-4718-91e3-e4549538f292.json and https://artists.proofprofile.net/proofs/artist/dd0286ca-2991-4718-91e3-e4549538f292.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 0x7c458dde346f52a54738ccfdea02835a150033ba881d92a9c70472182eca48c7. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/SE6XX2298112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e7895d7959e1dab4de70f75a6ae54354053078bba74d69d35637451fce39e4. 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/SE6XX2298116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143608d0def839c856afacae279d40ec476fc338c274bd4e0cb3e2f52f716aec. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SE6XX2298114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d14df6dd616afd5460262f5d6a7200a6bb8a60e83f93d9842b6d4984b63f63. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/SE6XX2298113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5151a1e70ad614cf7e2bf3d511912cb7e30c0ad81500784d8c9a150e18ac3bf. 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/SE6XX2298115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d38315baa1366897cdf30b3525bb05460e396f345d0c3ee11c6cbdc9dc56d5e. 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/SE5752362446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc406fa73ba48d0e0100fb7677bb831a15c2fa4d83f79c43938038277c91892d5. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/SE5752362449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cd0fd1c21f6155daf26fe4499325be284708345b3cbfa4be0efdf282e48112. 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/SE5752362448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c183d2e4065039b5cfe65da11c55d32ff024b076a311dcfb2d56ac77982b03. 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/SE5752362442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0314d4c0af9940b41a147789631a909f418b42c8962e6438cd58a651f9fa291. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SE5752362444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b552e0bb3f6c86af054dbb38f4cb409e4728343b015994fdb1a983850896567. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SE5752362445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc566f29e621e2b60e95340edfbf08e45ac59670b3271123ead944ff520eb264f. 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/SE5752362443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9859c8c27636e35b769168274dc15ed4663c135b6c878a809f8c8b5254f2b056. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/SE5752362447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b57cbdadee4398eed5774eb95a1005c2387b44c527f1892f71495d668d81d1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6SA2384717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709f98af4ec0060a9d126e680c46859a57fb0f729e07eabb51ff6d0c9ca3d436. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/SE6XX2329554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd490cf7df98cedb6b7dd061f1d890830179321ab44e5612d0fd66a72c34f0c5b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/SE5BU2540929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c475933571dd8848d9fbac15d4eb433d9e43420ac4e0e264f3fe14b61ef7397. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE6XX2552919.