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 0x6b0ae6642133563c19dfac70ef993026358f99e45c3e73f6137d03c5560d46c8. 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/ce3aed75-4af2-4d61-bcbf-2c660b99d72a.json and https://artists.proofprofile.net/proofs/artist/ce3aed75-4af2-4d61-bcbf-2c660b99d72a.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 0x9c8f714828a6dc687b5c483efc23bcbe3987ad9d07c1ace70804652b1f651dbd. 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/QZES62284040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d98be6547946a781a205df930422b5ed22d6590c5d68976ac084b4d6677ab45. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZMEP2236524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150ddd7347e095e7f3375438cdd313eed72392f47d31257640058e1daac331cd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZNWV2226296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ea90a79eb46d37e91fbe72fee12640bedf84be8bc28c6b3b6b4172bfd21a27. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6M2318108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e4bb5bdb001deeac1b81453be9117b61f7400647faecb2e564a48bd1f4f00c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:37:57Z), 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/QZK6M2338587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2dc9e8677a332035bad59004d312f17134192315e45797a703f3ede471d3b33. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:04:51Z), 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/QZK6M2316972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72653c0bd51957269eb73eaa028d3cc935d5c386998e3599c390da70991e35f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZMEM2315628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf576b871a42bc59df5a416d434621ca544e0e0a2bba12017fd5b54fd81c304bf. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFZ22436794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bda9c273b1c28e517824ecbea52f378361e2b965c549aef966437654f93db24. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZDA42412039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70747b1e565e7395bcb7283889aa5cbdb79427521032055b46877ccce3c0bd2. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:32:17Z), 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/QZHNA2424681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda41d81e266a5bd2bc3291e614cd74d79575db466b65a399d6c9c2c1dbf63dff. 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/QZK6N2410640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea96d6e843dfb5fee08ca98e3bcb249440093a561fa14f76dcc4d71e047c7c5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZZ772436919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde8ae9a2ef44b38093be3d77607673c7ac2e69bc02c70d0cf43ff4f8c3046b1. 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/QZFZ62529291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f2c67e62691ed5df777e5843ffcd0df7b4f47e8f89ba5dae33ef083a8cc2b0. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZK6H2508536.