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 0x8a2733e82244eb7db4bdf59cb2f9c532256a2327b8325999bb9b101cfb398536. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8b6fc9d-cdb2-4bcb-8136-9134372e795a.json and https://artists.proofprofile.net/proofs/artist/c8b6fc9d-cdb2-4bcb-8136-9134372e795a.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 0x0eabbd25a49abc831b4e6f9ffffd90209b143c40b532f0ebf220bbf06db3aac3. 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/QZDA82559582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b2a9d5466949591f51099f93fee50f25a4eb55d7880b9078d70bd65ff27d32. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:23:57Z), 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/QZES62538506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf343bc9f1b137dcdec908bf00ee6b83f734e6fae891cf435b3f2faed4bee9f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZES82573391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67fa23bd2a20d23fb35a8653cc2ece2034414b63893647ab5666b90f7cff69d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES82573392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd66b632b0665105f5d00ad8598f08c7b07722fe5d3063dc045e3106c2ae0a7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES82573393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bf06bc4e3efba86fbf2de06a912778ff271b43c4cf7eb599cc3bf9a9cf9b43. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/QZES82573395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c9dff3d23474f8137f07fbbf0a9610e75c96a4591f5e8b720c03e6fc8c9934. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES82573396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e72576aa81225d4b2be3133fab6d87ca65a61c7a37bd93378e3597047f264a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:26:43Z), 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/QZES82573398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db7dda0afd724e0751c42b49b485f2b854e47e515ae0872637fea205fa9fc6e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES82573401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ad2a14841db213bdc236fbd3e60e9e245922843114c227dfa72a2d2c3719e8. 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/QZHN42563390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d0f63dde448df5b0da5cd2f43db1a484d0220a8ed282e54db62d1fcf76058c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHN62593704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4565a50555a23983d2ce14e4b30c46868d7b089ca3f3d050e1789e84e4b743. 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/QZHNA2564792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9562aab1e0206e3726a801a622cf4449d62711c4ee62fc6d23fad6f357ec4d1. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZHNB2573134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8f87a466adb90390474e8c68c3805ba450f77926f6b91a126eac8f77025ed8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZK6J2590566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918d7b3dbfa5303682a0332e3c0b55b7b54181e7e9a6b7d7f044901f143c058d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEM2513109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428c74b4dcd118df8f88d4d567a607a84ea44f5a304e1735ebd245e2aeb12ed2. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZMEN2517760.