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 0xdb1dcf27d1590427d9ab23044f468154dee1426745c895b898dac0d2d3a918f7. 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/b444252b-7859-4c39-b12d-cdf4f23515a8.json and https://artists.proofprofile.net/proofs/artist/b444252b-7859-4c39-b12d-cdf4f23515a8.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 0x2ebf82f4f2e9bb8f46ef55fe8b0270f89b28e060cf523c1487bfbfd272845887. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ING212473220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365aa07527850b5b6da9eba21957fe0f7d51bc40290a6c8013d5752e0d4c21fa. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:35:08Z), 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/ING212473251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02de6b7702a7b4a5879b0df9bdd538fd49a5276e65385f656111b617e3ff03f0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:03:46Z), 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/ING212473254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e14fe07962bc3ba851191dd8b2a81aaadab53917d47c022f47db732a4059f7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ING212473252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320f4a3294c6f846a3942e3bd30fc3768d77a40689de7d29d39258ef531021e2. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/TCAJW2528108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770e16f54a5ecba768b1e0e1ebbfe76365f5fe34077678e8b6a64a382f891c60. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:32:42Z), 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/ING212473502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e4b4ab549f7aeaba8e5cc2c2a5ae21cea3f251ceae56e9f5540370cc8db9cc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ING212473504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659cc291e5908af50470568066e10efc08bc6273c7859587d982d943f0b7a17b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ING212473505.