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 0xa570f9c65536b182129a38e988e48688446083a69c9f20a96f902b38b60a59f0. 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/752d3c62-dc1f-4579-ab0e-54475968d6e3.json and https://artists.proofprofile.net/proofs/artist/752d3c62-dc1f-4579-ab0e-54475968d6e3.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 0x06869b450ea6ce6699bbcb77d729b836e8a57953aeef2653718173a333dc3550. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES71G2215042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd437500c7f4ff206d5967152818fb210d8b902fdfa38d999cec0f5852853c119. 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/ES71G2323292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3219474040c8b145f298aec814baac09e241f3f4c82f9b9ebdf2bdc54eb110. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/ES71G2323990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1e97ec9741befce4a8ff0dc94e5588a1a87c5dba442219f5618f2e36ab6d12. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES71G2335027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb303c7f3c9edbad1201c779aa4d5e063f9e7a982ca67263223a29df08bfe3241. 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/ES71G2411083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fe0a636afcfb71e7cc9e75cbaf4dd0a3bd025f17771de4e2dd993f1e5d192c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES71G2415244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a12e28eb830885573f9c7c7513b98c9efb4a186b2a783bd456c2b40ab8fcf7. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/ES71G2422636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5f349bb0537ea0798d5ddf3aeee94671f192488772e1a58ab57d4cad0133a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES71G2432233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1c0e938c2049e4c22863e73cc65f65471151734b932547916706552af940ef. 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/ES71G2503772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470380ca8cf2d2fe073ed9de103eeff990d441ec2949f4555d138c9f6abbcbcb. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:08:28Z), 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/ES71G2507487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f6de5a2b8463812eaf6b52ad26c303bd834a267ccb7e32d52809eb9c04c24c. 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/ES71G2401189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fe0a636afcfb71e7cc9e75cbaf4dd0a3bd025f17771de4e2dd993f1e5d192c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ES71G2415244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb303c7f3c9edbad1201c779aa4d5e063f9e7a982ca67263223a29df08bfe3241. 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/ES71G2411083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd437500c7f4ff206d5967152818fb210d8b902fdfa38d999cec0f5852853c119. 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/ES71G2323292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ceafe36751b4b434aeeb66125665338f33a5fb66335134b1e3244c53486eedc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:31Z), 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/ES71G2507494.