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 0xe4bf20dc7e02428f7577580da90d693cabfe50e9cfd207cfe9141c24e19b961b. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bfe447a-460c-4a30-ae37-7a479f7df9bc.json and https://artists.proofprofile.net/proofs/artist/7bfe447a-460c-4a30-ae37-7a479f7df9bc.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 0x004d2acb35507d36a5aeb1ceb3abcc991426bcf6a5e26282679294bd7a9a9003. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/AUMEV2485339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1b98ba1f0165189ce6fc1bee848deb4806cbb3aafd42c504fdff805063d61d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:22:19Z), 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/AUMEV2485337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ed96b0d4097e2ed2b1b4aa76f16fb4242d48475248f6e68121bcd4c2a85111. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUMEV2485342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004d2acb35507d36a5aeb1ceb3abcc991426bcf6a5e26282679294bd7a9a9003. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/AUMEV2485339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6d27f7b29b2c43b9192af5ade15c5813f4bb583ec362a66b7bced2e1897af4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:05:22Z), 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/AUMEV2488702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7dc79822faf67c8b6c899ec8fac5ac84891ac82be943c4cf2b04058e707fa2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/AUMEV2488699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712b1a105526987cd1ff54f9ef3456851538278510895a6ea13849daf43c7a44. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:36:24Z), 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/AUMEV2496634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7861f6387e9c441eed111d1634ba59cf767137795ca8b3dda503bb688389a0f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/AUMEV2496633.