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 0xcd17ccd021545eb04a01ae37af5bc299ce2c3627d786788ced1d0a36ea694ef4. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e9aaa5d-fea3-4d1b-8dbd-abd63eea282a.json and https://artists.proofprofile.net/proofs/artist/6e9aaa5d-fea3-4d1b-8dbd-abd63eea282a.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 0x9dc062c07431e769f4db57d4afe765651850034fde0644771675ee1c9f2b2f29. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:45:14Z), 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/QZHZ41909630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6651efdf829f06d68cac42e3c2e53954f020d3d6e9b32a2b41090e2a9e0e974. 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/SE6HN1969130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3319e0ed2fd91cd956767a21370e6fcd62c5f114374524bfe408c8a4c0678f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/SE6HN1969132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f77169f0820b030cdc1a6802c98897ff2dcb644161ff04fe275ad10b5c45879. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHZ31962058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f9fa3e740365d6e5cab5ac4fa4f880c1d39957680a7c67bd0a5f1e381bf6ab. 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/AEA0Q2006318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1106f4ba186ca486ec2f52a79c1cbfbaa948cb3e5b8abf2f9daa58cc44962d34. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:04:37Z), 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/AEA2M2107534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea80d320309c7e32b04c4e41961fd7f3a8ca1d13ea3d4d1df8e68878aa85af7. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/AEA2M2107535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1800cc1710c083aea2cc79fb7b9966b6f96d27fe3d54701abc17952c997dd9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/AEA2M2140373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360c0c1267917b15c27ed909c0368a2927aa596d3b7a15b2ebf77513008a1641. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/AEA2W2400398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359a6d4c62dd97442fb5fab5fe5ebe3fca638ff83e46788e7aafce23141bdf5f. 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/AEA2M2412583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dc67e82a677957f3373ac2278f070d4581a9a9013716c09e2d6a16934c1e27. 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/SE6XW2411534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7042c817835ffed2b7049a074e6bfd6ef0771971eb6c99ff594c9fcdf9b7e5ee. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/SE6SA2525446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf27872b443f024e5f19e0946471ffa51a3926cc92773d59649000a5f7938fe6. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6SA2567130.