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 0x5a1b4bd9c141f6a08003e1f3b341838c794a2ffd77eb83bafcbb0e17122a8901. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/942c42c4-b661-4f7b-8953-e731f5d04eb6.json and https://artists.proofprofile.net/proofs/artist/942c42c4-b661-4f7b-8953-e731f5d04eb6.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 0x7dd2b57019e5dc314b2db1643df3dc21eb2afcf95930019132c77d70f3011ced. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/EGA252207236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15328ec9be72f918fd39d09a129d5f859e0831c6f35b40713d59f60be2cde095. 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/EGA252211569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad7f8766028bfec185837c9eb6d4e62b3b24596d89908ef39e7c1209796c84f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:35:50Z), 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/EGA252303334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236d14ff7b4ec5ab969fe3597d520dadd808e6a89b70dcc964b12e9cf07e6d6b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRX452447685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e62b842fa4bf36ca79c1a9d1e7ea373175a4f5a2804ecbe389593504f30229f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DGA072435511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0d0b5b04dcb9001af1db40007446aa51573d68d21ac693fe52cf891df74237. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USUYG1578525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfd7008e6610464b4e199e4e9022ef0b786c22d2e66f56dfa7572d86c4f373b. 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/USUYG1578526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb90f586adf3604ab5a1ce37aeb4b3292ac5c4b3b3201405ded17be6df204bf. 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/FRIDO2415101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6a67a3f6d6728f2a83459b2c6da4be51747938147bcd034a3744ac7ae555f3. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/DGA062538872.