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 0xc7ea04b51ef2b1b3ca1937b9a551a33f33fda4fb3a7138364573fa6b741cf883. 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/413d515f-d2d9-4a85-a557-d55775a1a562.json and https://artists.proofprofile.net/proofs/artist/413d515f-d2d9-4a85-a557-d55775a1a562.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Melodie Napoletane / Io sono meridionale
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 0xa13d3bc6068683f06f7f734565158fb969e87d88fd4031239843623ff7abb07d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ITA618606811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1848cec90284e0900e3bc82c03d1c8f08a441b05e8e45af85fc44bb58920cde5. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USA370534534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de40c294831b83be5a3a35c34fe52e325934f2e3d2b607c380c086bec439aef. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/FR6V80448182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe30c4408c64c76420557982e670f0cf36fe108ff4cf09c43b78eba99a3d90d0. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/ITH471901105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d772d27de62a97b51104c79ac7616ed1a4f195ba45c227d8860b3264e8a7c23. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ITR632100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e24e9b07fe225acf91f62f4f5c8d55bb65c6e159d547e81a6dd24601c46c45. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ITR632401122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bb9d09d72d74a43c8033a98672aeed038eda75f275b8f347ed35e309c71c3f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:27:35Z), 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/ITH472503301.