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 0x233d8796c77a94fad9a3f6158447649e70bedf333815da28c475bef552adeae5. 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/d9e8a158-fdd3-4fa6-874d-1ab3868ede40.json and https://artists.proofprofile.net/proofs/artist/d9e8a158-fdd3-4fa6-874d-1ab3868ede40.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 0x9eab9a765ef98a17cb510cabc6bbc3307d487e36d9bac11c2c80d181eb73783f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBA2301219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b61c36257b08a61d4be3e5852a91f41911e739f20fa1fb975069deece9ee826. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTBA2301220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314a008d30b03f90c30003b2362adec0da59bd3efec7d522bc8b8de3da55040b. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:24:14Z), 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/QZTBA2301221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8783aa679b1034f9418623c7b972113ff0f13e83202d0df0a56f463793b6cdd. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:50:19Z), 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/QZTBA2301222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67bdc820dee03594ff930cfcaea4bbd990e8917083816be3750107a0a8b5ba7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTBA2301227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5233b27ec9363b245851e1ad0c41163ac88a7ad2576e493caa5c77dccc5e329. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:09:50Z), 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/QZNWZ2429090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9e4351a6065339caf1a8900758eb01e85c2dd8be179b697b7c49169d61c219. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWZ2429091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ccd04e5c99a993bff3d8f83be10ea734a23af8efd82b7c638b885ad51da1a2. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWZ2429092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7073a02d19faaba81952f24f37d5f80f25970590a8b64df3098f52f4a4d63a7. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZNWZ2429093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541a3cac0d00009e42316509b694e0a9612251d8aac7aaecc9f634439aeb3206. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZNWZ2429094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0154d84518e8bad1cfaad6eaf47af3f52f9ec083b4010f5ed6bbd179048ee9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWZ2429095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326064a34b9a2b7c0e11b65f3e912b8300c02719bed23447a1b9b28b1947c4f4. 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/QZP7F2561970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aaf0bcef1d0dd2dd1bcefbc2a4d0c453a8cb795fc824a8a89e0f68f176b5375. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZP7F2561972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de0013486faeac00af6edafa2d8ec5ce2b8a47c395fe3102ea1babeb5fb53cf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZP7F2561977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe463dd22ef9c892dbcf3bb2f31582ade9e697bed3c0f0fda88c6fa9376ba0ce. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:40:43Z), 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/QZP7F2561978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd6b5ab84447b624e7aa82a6d63c44a72ce546d020db70b467003fb4859d693. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZP7F2561979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959246bf0acc4e8ca81187fdf320eb67ad5696d60cd2997c367961738fded9e6. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZP7F2576649.