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 0x76793aadd6f106318b84e09679033ad5daffb95fe2077b24928c6aebccdf1e56. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2bcbe01-4273-4dbd-8bd5-13233ac82ff8.json and https://artists.proofprofile.net/proofs/artist/a2bcbe01-4273-4dbd-8bd5-13233ac82ff8.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 0x255e822d88ef1d96be945ec25b085652de9396ab4490f70178ed1b3b6fe627d5. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTB92219030.
250 (feat. DCG BROTHERS, DCG Bsavv & DCG Shun)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd649986c108554042f19951a21e9e6efca4b2cbd4b9e5504a516360e81e7abb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USLD91752532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6376768d103dd9cabf9decfd4b6be5119a25538b80fc7e59ba8c3549758866ed. 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/USLD91757638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aeca7b940e20c323acad2dcc5a030de0e1258edf7d30aa2b17f12da8372edf7. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/USLD91763928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d443dfce1f7a86be064d1533f1e6b5d917f1768bbd1d9793c67061eb31ec058. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USLD91763929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75c74a03a4669f1ac839955e50699514764a52ba45e1a18fb2e1927301a8832. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USLD91763931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6376768d103dd9cabf9decfd4b6be5119a25538b80fc7e59ba8c3549758866ed. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USLD91757638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d88644fd7e62b87aeca88caaa9d220876b001fc1dc7fa5ea9f8943cb0fb369. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/NLRD52419800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b5c5b08e5e8a9e171c3bc56dae26ff3f9b51abf5b52fdb7f61b37c605b2cd1. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/AUGBT2532280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1e97cedb3ae30d68d612887c748c88e3e2b2c0801d99d60912312273979bbd. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/AUGBT2543269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041083f0096d97f3288b795608eceb35bc5953b413c1f9224806cfa14abd1fc9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZNMT2269790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1990c324ef2bff3b9e44ae9f1cee7429d0f747c90617e8d0daef16f328a1e3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZTBE2383536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78962919d7a8d715dc53fffa73b9f146a201e4ca0de831dcad5d18e9ca37727f. 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/QZTL92510546.