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 0x016abd40fc7d97c4622e6ff410f847f8be55999cb719cda4af78325980a9d860. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b899925-6c77-4d80-86c2-434ef50c38ca.json and https://artists.proofprofile.net/proofs/artist/2b899925-6c77-4d80-86c2-434ef50c38ca.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 0x1abf216080045777b6444d822abd9d9dbb22694fec83aa72477ccc3e8e247379. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:25:47Z), 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/PHUM72100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641a8d67221627ab9671f06a1fb71f2fbb4cced67fcc6c2aa0cc78461ee12168. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:40:26Z), 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/PHUM72100289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e212226a99383f0a6670b48edcde343b03188999a16578a7deba44b3ca54c0. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/PHUM72300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a39e7645301e0ef600e8a3bcde2d251df78bf7dcfdfd615bdd2ea7af75d3dd4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:44:26Z), 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/PHUM72400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e212226a99383f0a6670b48edcde343b03188999a16578a7deba44b3ca54c0. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:52:56Z), 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/PHUM72300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289d29bdc8ccee0a41f9e3253b2e4b61417dd973d21c246691c9fa3bd1124be0. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/PHUM72300230.