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 0xcd80fc6f1a14e55f82c8f9e1f9e058f336d6bd7c120dde656203beff28ba1d17. 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/5f28c93f-f4fd-4ceb-a5fe-6dfbe289ff35.json and https://artists.proofprofile.net/proofs/artist/5f28c93f-f4fd-4ceb-a5fe-6dfbe289ff35.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 0x49b8410d57febd7c93df7cbc88a7d814b7d3ce3a49e49b58b335c09da4ed75d9. 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/PLA552400650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b61e4ec69d7d3d27e3ec4c89b28a186a2fb91e2c8aed43221c2f6fbe54418d. 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/PLA552400649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019b4cd1855ff6d77c679d907462a425facafdd3d318a8aedce460fba8136c45. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLA552400648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefde8476af3f5069c9b0d5f06d779b7119e2b316ea077e35e3b3d843c6c30bef. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLA552400635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2dac29faf0a7413bf9d36c55a05847e02d65ed3152e11c4f4d936ab4cfd106. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLA552400636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dee993c9cddfa7f01125481a3682d722403a2bf3545d6aec55a5c04129d238. 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/PLC062409373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db950d38108bf3f80a484accac5751afcb1fc523aea50d491dafa5a82e72119. 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/PLA552400678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2611565bc48994cd288b70af3b7b2bf421f06505d1d2a530ca258dbd428629ae. 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/PLA552400681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0879733c7c784aae6208c9c676d353dd61b2ff5c1cffb924f17bf5917fd3974d. 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/PLC062414309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0879733c7c784aae6208c9c676d353dd61b2ff5c1cffb924f17bf5917fd3974d. 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/PLC062414309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54477330aa516e0e7d0b48693e63d9ac537215b8f2a46efe0aae57f91f6d2376. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PLC062395085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cee9bb866c1a557c0b8420d92d08fa5c1d784a0691b9fa1eaf300ba325bb13. 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/FRX872427103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14837ae7421cb919d6a66c53a3c3324d760534dbbf9ee678fb70e70885b13c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR10S2461282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d95970757521a0c8806023413d11c69e44b8870174bb62164d73dce3f2247d7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX872427106.