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 0x1a39dd2427d1ce2a8989de6f0e636a5114474e74cbacba5774f97eafdad799c0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfa1b3fe-d371-47e7-b4b8-2bd086e45933.json and https://artists.proofprofile.net/proofs/artist/bfa1b3fe-d371-47e7-b4b8-2bd086e45933.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 0xc245b8b6f4a87c9250e2adce1e9493955bc2eb81122c7899aeeda3993dc8c8c0. 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/QZFYZ2308093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8077a70d71241ff705acdcaae14c57997388bfd50e4368cb9dc694fec4ff20cb. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZWFK2329440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f1e10e130d2748e373bca7dcf0a6ab0bb4fa9b6545db4490969874cc133bbe. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZK6P2452430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2854a34003acf37a56838c4c3cf9030548dc497ed0da340d638e3cf3997ae1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:58:22Z), 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/QZTB32452774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2c81f76dc36461f4f8e297143df2ac4c0d1d733f7cca6bca0804ab704821dd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:55:56Z), 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/QZTB32452775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f1e10e130d2748e373bca7dcf0a6ab0bb4fa9b6545db4490969874cc133bbe. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZK6P2452430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f96388705a0fb65e45f923b4c5852395cf16b80bc893164fa8189d4095b98c. 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/QZTB32452777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d472b5026ac6c0daf945a95f53f2fe1681fa849c100a99d2423a9f009b9ac0e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZTB32452783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9c8c7f66cf6b39080983e52043d2e0e57da4728806087e69745734afb48840. 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/QZTB32452787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e347fffa8b13e52b933dd7ca99514308f4ff98f45011308814289b27c5bf93. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:14:38Z), 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/QZDA82597873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb29bb01550e9178fcf52c0f1700259927032027ec3fb59b8efd5fe5e2b2c01. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA82597874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa64b459ee28cfe70f398b21dd7fbc64f95ccd9117c82b4547570204138b2c1. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:49:07Z), 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/QZDA82597875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b851507360344e6d59bfaf6adf6bd72001977e02d92f58d07b10b0f68bf3dde. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA82597876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2e6f7dfb6d88b6ac4d8e7872f52c7a59ef47eb3ba6c5725a5d1fc59e0a21b7. 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/QZDA82597877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1530a95c4743d3641b104b6f29e388c98675e96bd05195ee22fd23f48faada25. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZDA82597878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d743f2dec6151414edfc161e9838d78d43cdd6b5af78bd4e385230642007994. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA82597879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187bfb65cb492f02f9faab1f472fe13fd0b3d4ebef915cb818e01297f29fe715. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZDA82597880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c90195fe12532231ad9012029bdb0b4a111a442894d59684d087389f12e61a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZDA82597881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad4d6fffb31e943efe30965e404df3b848ebc55241d99fc546b9191c1c3a3b2. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA82597882.