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 0xb22f81c065b5711907eb4498d02a9106deac3cf9bbcbe62b65d19cb1848492b3. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aef25395-3cc9-448f-9e22-c7fc65fce520.json and https://artists.proofprofile.net/proofs/artist/aef25395-3cc9-448f-9e22-c7fc65fce520.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 0x4569a889e8b7494e8ed15178f0ffe40ea76f906a062f17ea2eddc58890546ea1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM7282496326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf589a6cc46b66ec0fe2fdd38f12a16e0bda3ae9f250750a9544fc96637c734. 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/QZK6Q2242910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7a25db2ab54294572ff8eba1185bf308ab16a49e12474411ec04121d5ef8bf. 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/NL5MF2101865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d4ea2a0788ec71d42e6fe8a7c9ff37ec84e9d0de60708ccc3ecce83e0aeb07. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFME2105335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a329e42b7817a4fba0b5763ebf2eea61a1ac307bae23aae7d830790b6faee6a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL5HJ2100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a2f28b12cfdff223e6a9dc3233a48c0d48cc47be8e3e37cb8831669264c3a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6N22112504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf827de6b5f34e7010b0c98496bf20d343e4908d15b428b0167fcbfe45f848197. 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/QM4TX2128698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0171c494fb43329bb7584ff9134fcc22fad250ed1df3789eb2f222b9762f552b. 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/QM4TX2053496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9c58057c10b7479a7980718e6e46242460b29e22cec4ecff879728bd4b0ef7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM7281905401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93883995dbeadd182d174d34e56fdde9b9378751ea824f6209509cf7eb65bc4. 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/QMBZ91997085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93883995dbeadd182d174d34e56fdde9b9378751ea824f6209509cf7eb65bc4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMBZ91997085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1e1053cc26b8e8843b18ffb957ed4b9f85fb6cb1af13072738b32b8c01fc19. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN81967785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9c58057c10b7479a7980718e6e46242460b29e22cec4ecff879728bd4b0ef7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM7281905401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9902715e8c9e050fecd592b9c1ff14e461e89ec043ca81a6a4ee833c4c30f436. 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/QM6P41909963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63b223d097d75f76dee0caff023f550462922328ad07771111731403f96f040. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES91947642.