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 0xb71af4dba540ee0a16e80187976ded4a83e6f16546845305075ad9293445cc93. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72779dde-0ced-4645-92a5-ce04b57cce6b.json and https://artists.proofprofile.net/proofs/artist/72779dde-0ced-4645-92a5-ce04b57cce6b.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 0x980a27ded1c8ae5c92a00158cf83c25f458852cb9db98f19bbabc4588641ea5a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:04Z), 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/QZS672416066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980a27ded1c8ae5c92a00158cf83c25f458852cb9db98f19bbabc4588641ea5a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:44:28Z), 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/QZS672416066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42163e4d702909f14d8a81a64358c12ed2004596184578795773762056b05304. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZWFR2464891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda37b59d16492fe75802b1353e447b87caa9328948fc81524ed410d89b17b7ce. 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/QZWFU2421160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda37b59d16492fe75802b1353e447b87caa9328948fc81524ed410d89b17b7ce. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFU2421160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c543cc979fd363c1dfc3026bb44acdc46825c38e5eddf501092e465ac83da9f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7L2446111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c543cc979fd363c1dfc3026bb44acdc46825c38e5eddf501092e465ac83da9f. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:32Z), 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/QZZ7L2446111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7752e096731f3d907028b5c6ecccda35c218ec66e1b513da42185121e61e702. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:07:26Z), 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/QZFZ22549821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9866c42b40cf133f67389297e617b6291fdb357e8c0455993fe620037752929. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ22549823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2477687ba772994d0d23fed349ca15aae7a49dc3c4b0c8893f78b85c395971. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZFZ22549824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e720cef3f1873fcf914bce3c79f5faebd8e7988f89b18eeed5d7f6b5976048. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:09:36Z), 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/HUA612502931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7948b2ea6b66f9274ecda85d9dd9158ab5a624fa7ee19b376639c94bf3f523f7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:59:36Z), 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/HUA612503119.