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 0x4de98b17285aa0d0dfbc3e396bc3f0c9161b0642ff16c9faca85b59527ec7313. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76a4112c-da21-4743-8477-138a0019691f.json and https://artists.proofprofile.net/proofs/artist/76a4112c-da21-4743-8477-138a0019691f.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 0x0cca937f144b1be906f60fda3ed90765e2549e0301071b577e0a44d8eef85495. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ22542337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacfb94a49c3198e1209970424637c6bd8ca18091c18f7f7f50238171619af82. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:02:10Z), 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/QZFZ22542338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646e8fd0d70a159dad6e538e5c5e467ea28dabe2ba339e9e78bf6acb7aa4f085. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZFZ22542339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849271d0cbe8a4579c195b28570bd4133c9107170d7b463ae7ce5e064af3310b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZFZ22542340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7bca72d21c299ad3c933cac1d6e14dde97ff46f69bc62f5afc103d116e951d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ22542341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ff261cdfd68c711ed906a1d87572ad56e74e3582648faa801a918ced2e9118. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZFZ22542342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376183a611fbcc8980199fdafc91f3d0181bc235e12024c478633a686bb83cae. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:04:15Z), 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/QZFZ22542343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca0667e624a521547f26f88edbb57f37ab3bb6d3c41e9630373b84c877dee5c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZFZ22542344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95776e1d3e11a8f2e30787a76c722d7919a74314f33f80375381bf8befa61269. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ22542345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc5b97c4a99d09e24b96a17053c3377e6392275a842f2aa1a3dbfe0d46b3d97. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZFZ22542346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cae8289dd086c33a25297cd382b03b101153c08f0f59cd21f1cad2bcfe3c868. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN82549798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce649219782fd0044b957f5653b17001fd5df98cafd5ffcfe85c61e12107f7e0. 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/QZHN82549799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60e54be8783443c9541bc1fa6ceb5f8de602467f069271a04073e9c53a76531d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZHN82549800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c292fd367e06329923c28d3240568d6a96c93934d481064d7b9dc55db3e0243. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHN82549801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa52e802a703a10b1a34354b5e674e01ea9985214f8c022176048359fa280ee. 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/QZHN82549803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a0697db6e92de190ae6afbf585d4f50b53b9870e80ff86c8b4a30cfff39ac8. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN82549806.