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 0x6e457afba6547ef9a03f228e8a4a3e47d6c00f29961658e2886421f608ae6efe. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a456be45-336d-4cdd-9c38-93522a90c5f1.json and https://artists.proofprofile.net/proofs/artist/a456be45-336d-4cdd-9c38-93522a90c5f1.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 0x66cc0bd2078eb6bb50b2e15ff5b717ec1a693261a6992544e6f3f24d788d5f0c. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/USCGJ1982764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12d9e28304d3c8c3844968f3f6ce8bcdfb067f4ec0a3a914f9da28b539f3c34. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:22:49Z), 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/USCGJ1982765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd64d22fecacd7f1087ded058a7e838692c7ca8c30003d79b6d8382f00e60ec. 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/USCGJ1982766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdace5f05647628addcf629e93675f64f47f4571322374f52e216b2e370a63f37. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USCGJ1982767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c0ea457f4dcebec718761f121921878d11d70e5a8de4064b71d8f8b5a9c957. 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/USCGJ1982770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520221c74a87deb27faf0c13f057ec6e21632337067cd379c2c22c0d2157208f. 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/USMH92355909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37935c6040db155acb74f78dfbe177804732596e6f47da8e4f217483a833ec9d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USMH92355911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283f96e292c7e1781b87e142f83fad629b59d7ac19fccbf9ee801f3c5123a968. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/COAF42501923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa07fc913120ba09326fadcedbf1e4a2446941b8337d4d3c2090afffe72ed99. 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/COAF42501922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a12b4fd1d4b10ecfcb99b0bbeb165208718ccfa0fbe99a2289a6f7e079266e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/COAF42501949.