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 0x7a876b71f80dc77a870a02af85b4cab59942ab5e7987d9b133dccc711355ced3. 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/74a852d1-ad16-490b-9539-372770c5d018.json and https://artists.proofprofile.net/proofs/artist/74a852d1-ad16-490b-9539-372770c5d018.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 0xb6015d50cc0bdc8cbe282b8650ebdabbe65be54290f297bf2c38b68ac81b26f9. 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/LUIT72100286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46b2358ede11bd1dceb85c23b5313c46bc42bf3178c6e7b37a6b0c7bc1829fc. 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/LUIT72100294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dfc4d7d313ea782deb5cd87e743a630fd25737127cb4fe75802c7fb8380a32. 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/LUIT72100288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6015d50cc0bdc8cbe282b8650ebdabbe65be54290f297bf2c38b68ac81b26f9. 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/LUIT72100286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dfc4d7d313ea782deb5cd87e743a630fd25737127cb4fe75802c7fb8380a32. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/LUIT72100288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea8d06945a02047af8c3b849ad1bfa45d4edcb1af13da7812ff58d74ba27865. 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/LUIT72100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aec2859cef7c01cf3cdfe368dac1f68539205b436c6c816151db037279c0387. 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/LUIT72100292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46b2358ede11bd1dceb85c23b5313c46bc42bf3178c6e7b37a6b0c7bc1829fc. 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/LUIT72100294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d903b9a809d57ed1a0108c5a82d118d1cb339700d85d3d7154c7bbc3cd8741. 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/LUIT72100296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea13337958ac8a3ee9eeca3488e2ed1dcdcfc3cdc92516f3ed397bccabcd5a7c. 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/LUIT72100298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f15cb1d5c85b7dbb0ad49644b00896610eaec31856f4c383a689f7daa3ab990. 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/LUIT72100300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0b3344bf6d75b081c3931a21843b686dd2c441e7de1fe46b015fb8beef35ba. 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/LUIT72100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b35f652f1edad3b3c432858f25723a2b045b534bb46dc2d6ebf8a045e2b351f. 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/LUIT72100304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba5884be8bff3797ea41cb45fd8678605859533a16f51dbaae070fc70a9d3e1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/LUIT72000028.