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 0xf3f6d3abd32b74de7df992451759360f715c5ee1cb3cfd5ea199efb5e3324f8f. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44694699-078b-49e8-b7bd-9e97194f0244.json and https://artists.proofprofile.net/proofs/artist/44694699-078b-49e8-b7bd-9e97194f0244.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 0x0021e7276c4898adb39f905df78f8811f9594a08ec559e18ae1b5d51f9f057f0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE57V2404214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744a3c8a2ed85018e7ad12d630533e862666e8b1eeeed506b9d082114b7e73ec. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/ESA012505186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff971e00a9eef953f14b199121b67c7c234d8495dc7a71dc8f48c9c5151c7f69. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ESA012505199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6338d30acb1b89a8664e8abd58b477389ceb5b1474382c3f97e40283bce6e4. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/ESA012505194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b9bc3265d301585f3dea0d97e5c18cdae564b094e627f6c9c516b3ea2c483a. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/ESA012505200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c6f0bd06364ae394772487441ea059fbb92343b0f7810422471625f61bf598. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:53:55Z), 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/ESA012509274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc629dc29c61e924abc1e5b9da4b3c94683f5df615aaee5cc0116907e498ce601. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ESA012505193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb170bf4de1f8c79888be7a0d7b4e30a8ae817be5b9d59620301a5ff997b3251. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:32:54Z), 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/ESA012509275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07d5b2fefacbbca0f3eea59f08a217991a8c2e3fad82a2cb13c07faf7a5903e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ESA012505195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe507e6cdd553a464a54ebfa0fa0747d36b228eafd2c3ea8fb97d4bd4e1c68b46. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:54:24Z), 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/ESA012515520.