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 0x4886f6dd0eb565e668d68a773ed6aff38659c643a42a0881526bed3207d02217. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fd80ef3-9929-4c32-8b02-ce6bb1f18996.json and https://artists.proofprofile.net/proofs/artist/0fd80ef3-9929-4c32-8b02-ce6bb1f18996.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 0x2b3e7c61caed9c4cd82ee62a2e8996ab6f1d605459d78fcb598d01793c681e58. 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/US75J1200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6813c551b40066ae257f297b7ffb9ced146b5d61b6f15c0012a38912716f8af. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/US75J1200076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6838b2086a4ff536e444936d3fcb42eb1343eccadac3c37ecc8d259db751dd2. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/US75J1200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bb1391202c26e9a6ff84fea248379aa8d1d69dccd520984bfbf40303e279eb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/US75J1200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef0b259006dd88c5ec8ffee0937eb461790bdf0f275e7d6cdc8b0e59ac65421. 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/US75J1200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8a916b9ed1c139a02469056d4adaff8a070d03712a161fa8958769aa456a29. 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/US75J1200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa618f8f3743aec401de92fb9f84902718554ed4af3028d44c99b092baad01663. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/US75J1200081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a49615eaac773ce6edbde53d2c32f25d0c6c1838ccccc67fd22ed91b3737a25. 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/US75J1200083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614e957a2dc0d219e9d046121e5b3ee904684f8efe1acc423045e673c2c07daf. 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/USCGJ0838407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ccff137f7eafcbde93380c2357a85cb0e5bbb5d75e6a1cf463ce054fb9c5780. 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/USCGJ0838408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5139e5f6ff2477a17db883d0bd4c3630d0320427095796f212a0b11982d6f091. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USCGJ0838409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d749f7619d3a12ed438c2d94bda74f6855d0dfbb833df50e210c875a5265419. 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/USCGJ0838410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224b181de084d66cd3878646e3f6d55a0d1058e14b945cff233fcdf259fb67e3. 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/USCGJ0838411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45838522e773e34ff90aa68be15391a75972ed3e1b68cecb07594e46fb85aacc. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/USCGJ0838412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc651b3b1edb3094190c678f5531b838190a148faf589ba2c71d4a887e8364929. 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/USCGJ0838413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa5f26bc9fed18fefaa2c933794ffd30d4bda996cc653691f51b4282940f067. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/USCGJ0838414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e615f5f8ae2b91fb91680835f925cf818d85b93e99ef35a751165b9ad717f4e. 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/USCGJ0838416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69dbb8db0ca5a56af01b00aaae91d4440bf99f099fdad060d8d7e4582b30911. 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/USCGJ0838417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51669052c074558fb121e1d8ba9be0beef2581e1c643e335ac5e77db15b9ddf4. 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/USCGJ0838418.