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 0x5c2460d96bad545f9971414681b70e7f74754450d50bf5cbb87178e02f24c776. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b6111be-d52e-4c71-bf0e-78fc68dc5f8b.json and https://artists.proofprofile.net/proofs/artist/0b6111be-d52e-4c71-bf0e-78fc68dc5f8b.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 0xe6d03dea615904f61d5425f5217aac0727d2a7a6bfa3cc4b9f5ff3c2bb6f2075. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:07:40Z), 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/QZHN62387197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefdd4948f9db7ce5c0453c424a964892a06e1d7e41caa514dc046f7d5146246. 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/QZTAS2328360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa491c7b5fc2edb5f33da5257dd8aad065c2b8a0a9f36bef338377df651649186. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTAS2338672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffab103bc58f0ee90e6d8051ef0aa4428a9536e39ae503a8b1aebcf6846e398. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZWFE2324103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87da7b05356514ca804db9108e04616349e126ec7702e1c3ff9b4493597fee5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZFZ32442167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21316e3525f605a5e029b6fe7cfda1ce3d435b7b0014042cc3cf7c11bb86803. 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/QZDA52464627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a5ca52c12ca7e9e626f5bcc971a9fd01155d0e6e03d55f3c15fd366edb4ec5. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:51:27Z), 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/QZES62469256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996300e6cb537f48d9b9fa97452e85ac306ec44b69a20896b9a6ec13b1bc81da. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:29Z), 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/QZES62469258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21316e3525f605a5e029b6fe7cfda1ce3d435b7b0014042cc3cf7c11bb86803. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA52464627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50c76a12fcc2aa239ee824469f3e702dde1c20e98a2820cbfa0612e4d05770f. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZFYY2490164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb591253e650612d9c9ba0f0f4576d1b4b68d793eab0c460837825290c8054d93. 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/QZ5FA2450068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f26c6978ce20af7c458df97abd2f5a2db949b867f25f462609da402be08031. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:31Z), 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/QZ5FA2450101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8042b401aec90dffbc504a45bedfa2c39a41909387367d7b11d53ba0d16b7042. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZ5FA2450109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238ced61405951317e8e6241eb9809226559fa58eb2b2b68b680fa476a59cb44. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:27:56Z), 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/QZ5FA2450114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f53b4565db27a9c8b41e35e4ec1db8dbe5af26a94ea6e157636c6645ed60dec. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ5FA2450116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21feaa3c9fb8dc199ec3c0cb6e3a9dee58939c304ff927d59803028698780edc. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:34:26Z), 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/QZ5FA2450119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102249af096305c38b98502bace35b883818a9413235e7868f6a5d007dc34044. 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/QZ5FA2450203.