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 0xce9b36f1b275884b9321a25319c7334fa5403699951519498caa9911478be26e. 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/e2b43519-03dc-41e4-9b93-2e2a55d0f543.json and https://artists.proofprofile.net/proofs/artist/e2b43519-03dc-41e4-9b93-2e2a55d0f543.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 0x5400f17a19a7e11588f722a584aa9296cbbaccb5365ef16cb020b4312b06ca50. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USANG2202934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82056d6d5e6a0d47f02d88e507700ce3be8112d3bba155a49a6de23841d98cd. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:27:34Z), 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/USANG2203003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9440e7e4c2c780af18d0ee7968ec699b09d13259b087582792915bd30a06982. 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/USANG2203005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64c743d86e74e0f0a554587885af9268db8f1fd97bc5370dc8a288bc27aea8a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM21845185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd45f39dc53022624bc9f5f77b0983d6bdb3207ba31512716bb80c88186ba758. 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/QM3DF2185504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c45947ed46db45181349da329b74cd275453f97890623f03c3bfe9ce4fafc1. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:28:04Z), 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/USANG2453187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92d74f34e004ceacbe80f38d3f56f2e3dbe5e11d0004f9e5db252b457aca3c4. 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/COF012300425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b46ecd7928396261dfe0b6bcf4eb219f0c9ee832a8dbdeeb86e7be1c7436b28. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/COF019501522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7764a9356b3b0390e9612369b2584b08546b0ec7d0c6705a267f322b334fe2cb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/COF019501547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a71b3701f2a9b89f6aa42ac77dc8f6338af5d9c37c58f2bfb58e1c643c724c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/COF019501558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd2257fd96a22fb373fa532c15129e474bb6ea15587e9def17a95b08d874362. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/COF018900237.