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 0x56bb793805c6e85cf6f72742589ef51844d0fcad5baaf87a1d26fac2291fb233. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/981d1ef0-74c7-4fba-ba82-4785c1fe8c6e.json and https://artists.proofprofile.net/proofs/artist/981d1ef0-74c7-4fba-ba82-4785c1fe8c6e.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 0xd8c3bf55b0173ca86551ce6ad22d5eafdff4173f5f7b199225983326dfc31476. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/SE6A92332098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939c850103727be222909ff1395b818becb8d51b81ea9b21f31e95cc7b41825d. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SE5BU2438848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c99910e42dbb4bffcc6dd95d786d6bfb5d703f3a7b68eb07758c816893fa51b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SE5BU2575997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c3bf55b0173ca86551ce6ad22d5eafdff4173f5f7b199225983326dfc31476. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:55:31Z), 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/SE6A92332098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb81e41b7a35d6d04dfc0785c36661141ef1499f342c305987a02114f12ec927. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:24:06Z), 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/SE6XY2558281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c27ada7dba73f0525c1b56a18f6203867b511b7d53720d547fa3a9f611c6a56. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/SE6XY2558282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4acc0663d40631d657793c824968c2a88c6b41c12470199d93808add777783. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/SE6XY2558283.