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 0x3b632088c1a80f3b820d4467e9382894567b889d0cc27543640caa1a4ac02191. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74249210-02cc-4d64-aab6-ce497d27f355.json and https://artists.proofprofile.net/proofs/artist/74249210-02cc-4d64-aab6-ce497d27f355.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 0x2e5e2f33335e4f355ad5720a0e6cfda2d762abc221e839128b7e59a615114d93. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:06:20Z), 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/GX3Q92441778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82fa1d388cea7bfe2a35d7cae450bc3b0d659dc6167518c1a00657d85abe552. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:22:55Z), 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/GX3Q92441779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc77f80c71935d1ddde8b5e9c164980e2a4ea2b4d34d05b3a9d99a58a3eb15d. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GX3Q92441780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55eb357ee8c4520c626a2bee03a534d19a13c2a53c78d05fc95a8a3bd6f0a9b6. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX3Q92441781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377190275ecb14feb64e21f0b62f3d9e475c91bbfc7c03a33047e1e54a6fe5f6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GX3Q92441782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6234c72f21f001692d6c65e2852ee0ca102dfc19be41f4d062413b9ae83f035d. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:09:40Z), 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/GX3Q92441783.