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 0x73cc1de4de88755179c134b64b8f07260921c703c878e1cbad794158e5e9d55e. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cd00e0d-c498-46cf-a9ef-c28161d9b7fe.json and https://artists.proofprofile.net/proofs/artist/6cd00e0d-c498-46cf-a9ef-c28161d9b7fe.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 0x86d08c8fa4ac995f898f06cf0dfc7b5b2233fb3d9e6df50a47abe2acef02fdb5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GX3HH2120343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c1ca06468acb618c32d8e0491cdcb9bfdd21ccca1eef63c8f8a747ac5b321b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX3HH2120344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ac01639fdc6e34b0fff32e89f5153342b41a60c602c564216ac2ecf479ed4e. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/GX3HH2120345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa53ca3dff0d0e3ae9efeed0bb9ac5879957abc25c4904c27a39391f935ab3df. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX3HH2120346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d6d3d266960e3721d8828a4f1ee70ba3a926cb130d6d8fc8be63c1a1cbae7d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:48Z), 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/GX3HH2120350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d6cb06e576108bd590ceafd413caf1f7b2455e8f2613907b0f79f9b018ff9d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:42:43Z), 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/GX3HH2120352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707b17c5792623c8701f9fde70f571fdb494c49b79e04b9bc70f8663b6e121da. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:24:18Z), 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/GX3HH2120354.