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 0x1e8de6a5114a60cfd8bda7ee6ff87cb5eeeb2be6498d6929849d3326d59ed05b. 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/ec9fade8-bc26-412f-b013-d8842af7666f.json and https://artists.proofprofile.net/proofs/artist/ec9fade8-bc26-412f-b013-d8842af7666f.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 0xa8b65cb760a7f7d6db725134f3b33a02428df66e1e4c76854758e4ad858b532b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:24:19Z), 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/ATD751915604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf223f4e9ba0a8a7497551bee1cd559b016a0af06c982752842bda4e1a1e89618. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ATD752016601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90942ab5d5154640f2b82facddcb2b3fce952f866bd5e1112dbe3dbfef248631. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:42:00Z), 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/ATD752117404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7164f33d6e952f23665bff616e16ba98e7e63a8cc9ebe132fe21058bdb15295. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATD752117407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1b5e6d87e4eae997e1e68e91fa4572673ea8f242d855227fe96f2a655ca980. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:42:39Z), 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/ATD752323401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664ec195cffef733e790ec3c97604eb5168227f36f56c82057ed103ae17b5bd1. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/ATD752323303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26091079b7aa512e38f137db977ba9da8e7289cc8873c701b3226dde9da975bb. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/ATD752323308.