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 0xc7cbcdbec39436fc03e547a5694569b32257e1d208cda09cf68607876f3103bd. 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/8ea29f76-d955-42b9-92fc-80aa8a0fc5c6.json and https://artists.proofprofile.net/proofs/artist/8ea29f76-d955-42b9-92fc-80aa8a0fc5c6.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 0xb6785359d8d2c57c18d554b374bf35dfb746215829b40aa8ae23ac4e4f81372f. 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/SEYOK1631387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8eef61a847cace629fa5ec02ac0f0be6be76a726001bc409d45b2ff7d2ddf4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SEYOK1631388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d2d3dd99f0d17ca99292faa7bb1c55219e0deee3fd127f921fe99db739c3bf. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SEYOK1631389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96bbe23c7ac2cac95b0f232bfc8fdc096a84981a3d41f3e33018f65382d6742. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/SEYOK1631392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3f8de6b1b8e28881691268a2586a7871e0cd34dd98ba1bb111d512d5adb7e9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SEYOK1803537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe687315eb8ac1777644e30eb819d58bd47a5cf2c469a29717afddee2bd4d29. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/USL4R2057735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5677421db02f63a5e71905af377adaf86cdcd089da1c371b5d5d072ac68d9017. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:25:42Z), 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/USL4R2057736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d497ae08f11cbd9f990a282508b7d64993cc09f870814cb3e7efc66f1e5325. 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/USL4R2057737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247a15c4f6a455f0d1a411505ddfa46dbc1be70a74f93779d37c9378c0bfa02e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:42:53Z), 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/QMFMG2377955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06220d9b762a74bab02aa018ad1877c2c112b02f596808ad89393582c9db38f1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:58:35Z), 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/QMFMG2377952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247a15c4f6a455f0d1a411505ddfa46dbc1be70a74f93779d37c9378c0bfa02e. 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/QMFMG2377955.