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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x279ae391f1a40b958d0bf74cca0168b331e916e39217f1e59dc815300eb71ed6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73c4f8d4-5a38-4719-ad73-b05419132ffa.json and https://artists.proofprofile.net/proofs/artist/73c4f8d4-5a38-4719-ad73-b05419132ffa.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efd9705baabdab3776bb73ce0e2c1f25e1371fc6d3e32b87aac86010561fc4d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZA6EE2000073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb9731648beab10d786d5c054e3f284413bd24aed2bbe28ccf0daafcab1f74d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAP5S2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb999da4189dcd41ad64d75f21d041f5977944f331c91e456fc32de66f4cd20c6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAP5S2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bd833a99632cdd46022ca46d78e99e5bbf4ed1f4b5e4005099084b01b81aa7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAP5S2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8beb8041ed4f34e97c26c1e0aab1a6ab66534ac70b9a6bfcf888ec9014e32d4c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAP5S2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3194cba47e7f0349b054d216ce0e7f5bd40de670e2c45cc04fd3ec0186eb7a02. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ZAP5S2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2bb50ff9953bcc229d035b6316cc0c5346cb523e6d438f463458dc1aa62431. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAP5S2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5666521276facd2ac70f61e5e5910d95d1c8131a64b0962c476111b2c6f93afd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAP5S2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0bb68b92fb6ce693db6eb74cb4196e2ef191faafab6f18f141f34911566fd3c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZAP5S2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3e7da0500dcf2994e8dab9e717c1b1ef021e656e4a1792c26ec242cdfaa53e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZAP5S2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bbfc79f49b643ce471cbeb8a8bee8b7da6bcfd05343f3b74d5871dc80395d7. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZAP5S2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51cb629fb0d5a4b7646f29388d88f76e91615e9c00e29cb2e943ae1f8da5aa10. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZAC012301503.
Umsebenzi Wam (feat. Optimist Music ZA, Jay Sax, King Tee Tshiamo & Richard Kay)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40806b11e7d0c564c1ccc0ad5d01314b8b34523540a928f661698bf0289c4000. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAN382100025.
Nhlitiyo (feat. Brandon Dhludhlu, Jay Sax, Omit ST)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ff3f54dbbbe0d96e900353bd280fc2654bfde616e948f5006ab729317125b1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ZA56E2315055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5f6d599007ed8524ffa01cb9e454c5e8f9fce9ecf48c975ab0f2fd19d755be. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZB88L2400005.