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 0x009f9a440be9b9b653a107fec2e30577a4a2203b422c1f0a621a19c4439cbaa8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb3fb61f-3f88-4f9c-99b1-8812b53f773b.json and https://artists.proofprofile.net/proofs/artist/cb3fb61f-3f88-4f9c-99b1-8812b53f773b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Oh Friends/Listen to Women/This Skin/Young Colours
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 0xf43fa3adf8d7dfc0129f6bc50b7cb7e11b2c4029e19a4301ebd1e6d0b8dbbf61. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/CAHQJ2254155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cab451ee0efc9953a75e7f5db71b67f8ba2e83c859e612bf25affb242466842. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:12:29Z), 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/CAHQJ2254157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81e0eef893643f38c8238159c735110563175156fa85dfcfe56f255485df1b7. 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/CAHQJ2254152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208ec4eafb9fd49d907c46b8dfb9b987ff525cda45933c70e9be9b5712b85971. 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/CAHQJ2254159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd226e1720d2b74fbbe0fc9fb115ba08bfc1f81ea3e3dd31248b111c29ab3e77a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/CAHQJ2254162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff4301183818c325ea1901bf8f218e04a22d6b583482554469aad34b3c71e3e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CAHQJ2254156.