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 0xcb1cff7e1cfd0fac3df0b68261211f70eaba2ff89be23e025b60ae9ca90a59c9. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88dc3d04-2691-4411-b8e7-6ec4e13289fe.json and https://artists.proofprofile.net/proofs/artist/88dc3d04-2691-4411-b8e7-6ec4e13289fe.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 0x88d632c26a0d3bd27389ff2be6743e736195ad3503c81579ea26a8a8119dd606. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USCGH1258665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9341ab1d4dd08ab3bc518365266b349b224c5d84c1808b941beb4e73fde907. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USMR51442538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08199bfe755db556d8e88205d1bc24b6e1f4086ae06f05b81ea294ebaba39dfe. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:18:07Z), 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/USMR51442539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9aafacedd21b3040a7af5db05a36d068cafb2eb4357649709e1c97850bbf391. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:41:09Z), 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/USMR51442540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdd270973e364aa0d5c2dd5a46d599f4aabd4516630d6870a53f20571ff4f91. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USMR51442541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde80b51ac4c154079aeede9f7593f518260f19bbfcee9cc5dab04ea6716af075. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USMR51442543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37b1df1b370e2804d064743d7a34a3c302c8cfb5142820721416964826eb892. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USMR51442544.