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 0xd5bcdb803df0f98e2826e6305fc12192f38821fcb08da824adc5d9878d06b0cf. 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/d8a1c278-7bf5-4c8f-9db8-0c42213312ad.json and https://artists.proofprofile.net/proofs/artist/d8a1c278-7bf5-4c8f-9db8-0c42213312ad.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 0x6af2bff1bb1e772b7a9020dde4e6c5bfe70af42baa9d1cccfc284f761abbdc83. 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/QZMHL2028193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bacd6ed1130c0b389b1e7af66d227d848d0916471e98e1e19fb3b030406cc7. 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/QZMHM2040804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc5e68ad3fd18d803c34ce4329efa729ac0f246ff6d559737f43a85cba6bfe1. 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/QZMHK2069870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83338e5542d7c506730390e0bf7cef9fef2f89e9694ee31b67276da8e8493fd. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:10:15Z), 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/QZMHN2093277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f33df0c134ea1bcea2a410b3d0b0c16e9fcd4f5ea0e2e1505fbc041f5014bb1. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZMHN2034205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bddded56b8abb616e3537a994948f0483a69d15da856662eaa7588644b06279. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:38:08Z), 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/QZES62388320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa704dd3573db912863e7dd40f18e964cc7073242edbf4db65ec42752d20f8298. 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/QZMHL2008953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d249f83f9b120c893d2b970ea4a344079f1c196d74194d84f3eb55556cfaf69. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:34:16Z), 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/QZES92349687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502e68856242e66814044d2e65266d390732c8e69117e3984b9116aa4926a950. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZMHN2000777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad143a86d0a257dd863710e097f2d406e930c198fa9d774e0f725f889d19fba. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:22:33Z), 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/QZMHM2062013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e3b182bc276e8f5a2a06eb88f2e4689d1f46d7bcb80159221b397609351232. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZPLR2331716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12d3fa563a9f713f18dadcd2ece7b612e4ce94963cb7a77f62e31351f9e527d. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZPLR2331718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909b3494484343c13471a59bde29136a1c3020f323579da31ba4ad4756859150. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QT3EZ2449167.