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 0xfffcaf6488422523bde79365c911dc23ff1734cd55b507daf18ec37f02724c06. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f38ff3d8-892c-4fd5-8d9b-3eedfbe82daa.json and https://artists.proofprofile.net/proofs/artist/f38ff3d8-892c-4fd5-8d9b-3eedfbe82daa.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 0x1c06b6a42ec75c8d47f74d6bb25b3446e4f4738e2fc94640c461f2f3a7e08a6d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZTB62589291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03869f7f003ec52e49ffb8ba47a892113eb70c2a9199088a6dbb12ff3f0a194. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTB62589292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff1c09833b94020894b3e3403f4f3e6d50f05dbeb162dd80d341644812aeb9f. 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/QZTB62589294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa790284cf834e7dfa88d310e2a550fceb28b36f6ff14e95c1060146c5ac863f1. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTBA2520845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb15d2f945281e391dcece0ac152cb2921a7f9f68ff819fcdc48fd88ed8ea03d. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZTBC2586725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d0302702213fa31af94b109c17edce42d7f3c8a7e14dc0ae496e9d4cc4019b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:21Z), 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/QZTBC2586726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf823edf95cadfd9be8754e5abda89b1a7ca70e368372a572cbfef4151b646c30. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTBC2586727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28244b7d1c73a9b14edc3eccb8b21d9a0dad1e70926e7b1e70104ab9f0b2046e. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZTBC2586729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a95b6c2a0086264a90a9786be8749cc30819cebe719da2ec7e4177780de5646. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:02:03Z), 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/QZTBC2586730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814629ae771bedd19f73bf2374fce56863cb6f0bb87beea2ec71a4c866ec2618. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:06:28Z), 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/QZWFU2567681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cf8c642df3e0d2708699304fbea7accb95b5e1ff51d8142d810baf66dc6fc9. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:26:35Z), 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/QT3F92549985.