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 0x0620063f7c0ed30f5a624ad675093275553840eac2f8e623e7ac6297cb5aba96. 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/cc639f11-ccef-43ad-9205-d4f3bf028897.json and https://artists.proofprofile.net/proofs/artist/cc639f11-ccef-43ad-9205-d4f3bf028897.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 0x733d59d7fa5245bebc7f55127149b2b57d2455f6367091ad28a3c52f020f4a9f. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:44:30Z), 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/QZMEQ2446886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4525a807f53045baeb0c4d71b5c7f22cf94c1f141e06d426b75bd87832c17387. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWW2427005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce56b27993b9e09ffc9cbde38839e0cae78e3658e6fd4b7123240536360347a1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:19:58Z), 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/QZNMV2444739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e759a6485c5b841689790e4217c27ca4d910b6cad8dbefa532ba3837b0334c5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNMV2444740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ab84b50241b3cada604dd43c44ddfdbfc9329c6ea8650c9f3f54c4114b6a3f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7K2479601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2a08f1cfaab8012f121223a0c3fd4819bff28b461eefc818ea395cdd4c4ae0. 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/QZDA62586601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a42636a27fa40bd05caf4abbc97099473dab65d3c0f6a4e914dce8a739bdff9. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZK6P2532133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5832d41e7da365603bdc4c4953a97ab7b7d101020863f3e469b4fcb3648f858a. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZNWT2503812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9617ead6e65a9eecacd624f8c44affcffbaa7d13f1eeef771f7805d1c2115e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTAS2572044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293cdfa9852ebd35ca71071543cde24aed8147ff413bc0005fb898d270c41bec. 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/QT4K42589679.