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 0x566275f8586ab52bd9920ca18df86ad9b2e4d7ef89e5c1bda0ef00cd51045bf7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c9d7808-b0d1-421a-b3e0-61d662293403.json and https://artists.proofprofile.net/proofs/artist/4c9d7808-b0d1-421a-b3e0-61d662293403.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 0x90036fdcdf53aa4ada4a5eceb1e2d6107250fb8172cb9e5c9bc44e252e029b5d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:04:56Z), 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/DEZC62251485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e71baa8bac52986fd18b267f930ddef79fc2ff2b81fd2ff45d67d919b0b796. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:19Z), 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/CH6540802709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a14e43ee7ff975f38446867a5d3c11f5c8a9223e26617318bba9d0e6f8e0b51. 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/CH6540802612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52d2255db13ec877e2df82bff1a72b2b5281afa1f863c520aeba394c72ae246. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:12:44Z), 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/CH6540802754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935f5688a77e5b4de9fcf362dc3a628a96f2bc1746bc5f311d4852dd081d3d19. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:15:47Z), 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/DEAR41859362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d72a118458dee6e5725db03b4b4dcbdc2680a6f7dac9a30c4c57037e59b37c. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:07:36Z), 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/DEAR41878738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f92a4cd65114a0db902037e6ed015fe07ea6737acc0376a5cf9ce62a325cdf. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/DEAR41852736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1976f97ae7922adbdf5c53f25413ac8a0bf1d3f2c5489d418b1240c2135c050. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DEAR41864540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fae50dfac8c3a0941f5f2f8e837ae52b98220dd7a13d1c53744ff22a466d785. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/DEAR41831802.