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 0x28e5963fd8b23dd78d7d80263b4fe911d1b5389bad06312de0b4b77d39d93175. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d7420a8-fe32-4f06-8965-e8204984c2eb.json and https://artists.proofprofile.net/proofs/artist/5d7420a8-fe32-4f06-8965-e8204984c2eb.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 0xbd8ed431e8f9f65cc6a73d3388ade8b8e816e0a925414235e0d977c153a78da4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ21989213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d340737c0adcee5716aab03ba5bcc04c89977ec354201f9f9410bea924543a4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZFZ31921707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b974a85d8e97a17a154baaf617666fdd936fb47655cb8a6c088c5c82e217d4. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:18:42Z), 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/NLRD51966236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce70fcf41dcaab4224b446b04fd041b34941f79d993ba634e341a9904246cf20. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR2X42422274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d23833f7cb4897606637d4b897c347df6b65dc98f094b46527c22968c3c92f. 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/GBKQU2237572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db76a6a635f22100ed8a627778d223c915f8603a554f794b311638a2b7bfd07. 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/NL1LE2303414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef28dda83104cd5709288867d3922ea27b8d057901c3f45bae9380192a587ec5. 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/GBKQU2237578.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c173e15838ce76a6740cdc30679a0333b42c887a4f8589afb4c9445731ec93. 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/UKZGC2309080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba7507fab6de95d08fb3b6a430a158e7dbfdaef2368fd10e3064124e9760fc1. 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/TCAEZ2059073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f10f9eedb38d19f229a315d7511348fd2cd9506cca1c77c241108f0efe79cf. 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/TCAES2036492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc227e642763ddcab5d5c445b5d5c2fbd749253079b675e4d03940acab5811a43. 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/TCAES2036531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1664cd1d54f8a96478b4055b18201d02bc5ea108eca16e5de796212a61e70144. 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/GBKQU2194961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5ec71a07cec2734b29dbf4e32f8cf5e2c36a085715fe0c1331ccd7b11fa281. 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/GBKQU2194964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34dcd3fb57d028025c6053b3232bcf64c475ed5b405323c045cde5c3073eea69. 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/GBKQU2162620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f17766ba62bda8cf0912d3f16752f2822e633360e4470a29e15104532eb6dc3. 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/GBKQU2101989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9a6f885b9a70162597b4b516683c046731ce8d6e1b8e79a95cd24cad42b8bf. 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/UKZGC2501584.