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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 0xcfce99cc43aa2ee5e426741975f9f53b2105942ce23fc5b283e30978f4fbd462. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb28a217-0fe1-49e4-bc90-4da9de872114.json and https://artists.proofprofile.net/proofs/artist/cb28a217-0fe1-49e4-bc90-4da9de872114.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 0xfc7f50865d62fd27bbbc2b653b334d6780e4e32d926519d1fca7d69689553e4e. 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/QZHN82385567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42660fc2590c17bb111b666764120d8e7874413c7e397547a3146a0ec3590c3d. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZPLR2326287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826f9351ae2c0ed65fac87cc7b22af1e34d58f167a428f4ed793992e8d3f3ee9. 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/QZES72390523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6e6a3a915caba79cca1e925c8ce060155fe1a8881392c64b90b9a0272d7090. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ42404214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37b0966aad7e2f591c6d799dd268e625deee66f60067aa36346fecaca66dcdf. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZRP52454491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcceb6e5fab93da3bbacf8fddb414d603baf1afdd19d9c70c2546080ec09cbbda. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZRP52454492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9bb9c3aa56a72a14a3dcccd40c860011f7888bf7c3b2cb290078b08cec3552. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:53:14Z), 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/QZMEN2408292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533f7d63cfc2ca19318931994ee5bca7e36f29ef04790165d9561bb188a9b7c0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFK2494813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b066edb047a1debe4b0cedb549c98cab2ecf075ab5a739633306010985828dd. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZFYZ2589922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d26a97e2a1eee371beace054b63707522bd58e4d1f7bff07e4e577039755b8e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:57:03Z), 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/QT3EY2505751.