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 0x47bd722d0f17deb725136adff3807ac30c6ebb09000cd74e931b825aa015cfdf. 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/30773986-0ffa-49a7-a70d-0eb80c155634.json and https://artists.proofprofile.net/proofs/artist/30773986-0ffa-49a7-a70d-0eb80c155634.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 0xe042caecbbd19aafd1561d2fa25421b74722d5d70ada5d1225afd4e59b7d9da4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/EGA0S1910703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24852ce3fe78a44f3094b6a2575be045d6ca874faae6e731e905011ac48d492. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/EGA0S1906539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf819d711899f4d4dfa1bcb9e2f79d961f4b61c8c961095dbcfc11a4a2bc66350. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/EGA0S1906717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b180a4c5968d80b5fe7ba09532ece7c746099e90149e7b5635eb901a31fe73e. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/EGA0S1912309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ae55b6dc333f199c2f335e959d84b0114be1873cc741516db6f018c7859605. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/EGA0S1906538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963f3db1b11e2fb415ac7915fdf0b3a9d91f73fd517b4545cf4033860b89ef6e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/EGA0S1913991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ef3a6a6aaa985e0f152f5798764f79768dfe46ec35bf5949200e99578a63c0. 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/FRX202288686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13815911ac8f64d4c4c09a69dcf3678411d2881ba441891ab0bf106d58ff7eee. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/FRX202212662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff6ce3903d99e16e054bc0a2f63e0239486d2dbc9f67eeac057c373f24d74e8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FRX762263077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e075359f285c23a939611a25909124ad959190dae630953960741a7d98836e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USUYG1523948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5dbf22203a7bca7d145476d7e047cbda8ab0f8377792a057318b88da907867a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USUYG1523964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c07a8f19f3385fcc47d0e10a5b5cef69cbd3b1afb64a29ba99314256adbe0f. 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/ING212487727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace570bb831793d8b73a5a47c3b111ae03e0f787f22df0fd4d56408424b585f7. 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/ING212487721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd48d10d4e6c5ea70a8fce2e19a108485c6298fd5646d0f52664fc98853d94a. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/DGA092420937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbeacffa7c48b5eb85841c777ed7dc0b26c0e5b553a86b077216f672f4e2e4a. 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/AEA142105666.