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 0x07bc836caadcc345c7c5e4ec337ab69391370b495ca74026416f033909ee78cb. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c96c1bfe-fff5-4dd8-a082-b70f30f74f06.json and https://artists.proofprofile.net/proofs/artist/c96c1bfe-fff5-4dd8-a082-b70f30f74f06.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 0xf792ae62aa8b9bc03a2c090b9fad8c53763c0a9d8f30c0e5130a8d8334d758eb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIU2415910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5271ccb53b77c13b75d9c1c0af4d8dfaed47539903a2b0a89c96f19a054e5ae1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIV2448686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16042d1d426cf4a1c06dc57fbcd1d630d87c96ad14de664a85b90b113fffa3fb. 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/TCAIU2448711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83bda28d3a5f855b07b8c158b5c10bd64350e48a2efe35976d2b2b702b1b4a3. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:47Z), 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/TCAIU2448747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3117ca372dc766bd231bde5ce928fd980f48c2ac3df2b9839f368a0ad8e9f6fb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAIV2448775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf085babc2d1d593cae072aa0c2b93496e7f73192a7756bb1b3205ef88b307cdc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIV2448807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb5605274fc2eef0ec4c0cef151d2467b98cbb879f449b33e15e2f15ec1c6d6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:41:44Z), 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/TCAJP2514497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877d5c262afc78f5a270e2834325a5af731d3dd68989b58e3ce1a37030f12d25. 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/TCAJR2567731.