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 0xeddb6be5bb88a478ae9d26f38193746f4ce0ad39864313561712bf12499c7664. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd6aa35f-2400-40a0-a005-7f8cd081b8a4.json and https://artists.proofprofile.net/proofs/artist/bd6aa35f-2400-40a0-a005-7f8cd081b8a4.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 0xf89e3a93851b8ddb20544607b96cf824e247ef2d3d4f8d73691d974bf330f802. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:43:16Z), 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/QZMHM2323131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603ca73dd4d8d3fc71727e0c594cd39e4a7bafc5b0a47909e3a5df6b9eb2fd7e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX5MX2403596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0f2eaf8aa67b5bc3715361f75bb483034fc6a4d7eacc0fb2182a42eb6be0f1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GXBDS2480621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068e84084e897eb515a90067240d7d246de77a8f612beec320853b104939c95c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/GX5MX2415159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed06e6488cf21092c3cd498921e44e5e06bacca7704ca43da43225c3fce6bcf3. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:36:14Z), 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/QM42K2435683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51856b417997c833062fb1691523928423edfe2209f5ad22022364fc6e71ae5a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T05:38:10Z), 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/USA2P2542169.