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 0x2038ace217601612126a2c83d96663b6adae113adbb107150e5fea142555fd78. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c425cc97-2518-49b7-bfb2-37fa7caa8103.json and https://artists.proofprofile.net/proofs/artist/c425cc97-2518-49b7-bfb2-37fa7caa8103.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 0x7f416e0796491a241f5f335f06cedb7c04f5c5b0fc99b07297db55b312adfc8e. 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/QZZ7M2541912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cc601d78630524412d82002e7990b469d6f5180b1873f1b2e5f500c77a9b3d. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7M2541913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9761d751668efa1edf5624b96efad6b393a7dcc2365ee2ba86e34a37252a269b. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:20:09Z), 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/QZZ7M2541914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bbd7e97931ff2b15b48cbfef76497ab2bdddf94a89fc3190a2546716981e6f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7M2541915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59411fbe57ac8df8b35d08f557903a1c7d5005b1b2360b513ac93e377e9b46fb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:23:56Z), 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/QZZ7M2541916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eae28ff3673d5d82cf161485235d243feb516c5fe23b6697be95b17af8ba275. 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/QZZ7M2541917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf88656e970d51c98b301f54788ca8de59962d9988b7a988da641307f0d21b5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZZ7M2541918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340b3c5691a8d1d336869e976fb5c77aae1e0dfca60eea4efb87dc74b464f9bc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:03:08Z), 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/QZZ7M2541919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591412f5f1813e2f67a6a48d65c25901e651f832b973c0eb8d766ea187288a8d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:22:02Z), 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/QZZ7M2541920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f21d7eff99e391d04c240436c1a00a96f88667e7a8ea23e25eda14004fbfd4. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ7M2541921.