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 0xe62f778ba36e13cd5eab1ef73ed158685d0e374d934f20e16ecb056271341358. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e45629f5-5e46-41b0-9cd4-78e53a9718bf.json and https://artists.proofprofile.net/proofs/artist/e45629f5-5e46-41b0-9cd4-78e53a9718bf.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 0x8b533e8f9c93c23bae51048e6e4f7e00f50db1fe570200ed8a92dea95e0ad09f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA072237409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a454cca8ad26288961383a7c386af52acde25fe18bd1a0183ffef44c0538df. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/DGA072237412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf3037a94ac788343f3a3d7bf05c12b303a7a17f4856418206d0cdfb89da79a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DGA072237414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3e2492273800d9914268d9d853e753ec97ba245c67ff43346335ba7e49f7b9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DGA072237416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02408d49309bedac72b70eea9e5b81fc8096f8ef342343e965237c3083770cc6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA072237419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10158856e44f25b48cbdc4ebe7036c19175eb3083d2f4570c8d45a486fd9ed2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA072237420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaff075bff93896475ea343fceed37fae0cecc7ddf7fd5757e31ba9cfbacf4d. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/DGA072237421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa485fea9c4d54c0f670e69e4afc5de9e0a2f169c6b1ef6b947644131c8c2b7. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:58:08Z), 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/DGA072203157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccfe3030863f766b851aeb619ba1d381688fe0ee28da94a60dc17e7909353e7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA0S2494599.
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