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 0x0d29e2739c79930488921e99e7ef8a118ead0b7902422fcdfa1d4dfded496c8f. 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/5de238cc-6f11-4715-a3c4-562367c1ace8.json and https://artists.proofprofile.net/proofs/artist/5de238cc-6f11-4715-a3c4-562367c1ace8.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 0xcc44d38219bc735cdd06a7db6a3b09be1d1060efb1ce9f8f8cfc117c696be9e3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2403575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78796700833c211587bf1e68ceade863463846244c66c711cd87072ef38eb4f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES71G2409438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5eb0ff5d5639a8ab1faae1d56986efc7c3fb755f14e0e8a19ad53171876fb71. 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/ES71G2406527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd66f85e60afc28c9102b9d53ddafb99d51b42fc22334740587dce70e026735. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2305228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aff7989bfdeaa1dcb47d1277358dbbe7a297733ae545a09254e138a0b216c4b. 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/ES71G2111409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2bb423d966733698fe5996899199a0056c155c091e43c197388c4c41ccc0b7. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ES71G2146920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74cfc631020a9b06554d02665fa3cd15870bca4fc9a7122882064c193ef5880. 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/ES71G2151723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60de2a3e318b6a8017cc61488d2c7a4f344a0f57a7319c70a0f4c75e38a559f6. 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/ES71G2215346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb175a115e4903bb91d8bb826f5cbd9be0a777736905fec1ebf31237de8346cfc. 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/ES71G2215345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74cfc631020a9b06554d02665fa3cd15870bca4fc9a7122882064c193ef5880. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2151723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2bb423d966733698fe5996899199a0056c155c091e43c197388c4c41ccc0b7. 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/ES71G2146920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462e210fb9382263ac0d816bfdb589d595c46ebe8564107979f0c9fa41aeeeef. 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/ES71G2141104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aff7989bfdeaa1dcb47d1277358dbbe7a297733ae545a09254e138a0b216c4b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G2111409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810960e31e664e8305b672c40524679dd5f2f3b90aa5cfe3f9dd65f0a7b50b70. 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/ES71G2061375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafba17332e74be495e36a52f75a3e7623aec9b345c2c212ff593962365a58ac2. 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/ES71G2051284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97ec9a64c96d02835ea8ec3734dea37b7cd46431cb9fca510e719064e2f0e6f. 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/ES71G2005483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d79d6e69fd1c1f0b0982f67bbe53b052e6c3ff3543c6654b9b7132967e82207. 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/ES71G2502530.