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 0x9bda7400ad2903cbb6306a1a6f9840b11ef52ddf6bb00a9bd54097849109eb25. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14bef9bf-cd1e-4bc8-9f44-41d013d97f69.json and https://artists.proofprofile.net/proofs/artist/14bef9bf-cd1e-4bc8-9f44-41d013d97f69.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 0x5bbb6ffe32eace235fe07f66473b077ca774b531bd19c172a53ded5ebd074da9. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/BC8472300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaf4ddf8e235cdb317ee34aac673010d3ec722323c128f0e0f1a6aa29ffeb09. 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/BC8472400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9830625ed5a6fee7f073505069b3c1244cb96ba707bb13048725c4ea4016698. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:04:32Z), 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/BC8472400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d3e8b3613b624c979e846ffbefdc10c9f089470de6eebe6325742e52621775. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:20:35Z), 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/BC8472400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e395b20cb98b1acbd781322d0dbf5de0ccdabaad878959ef38f04ebb3b6a6f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BC8472500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12876074681f8129936fd791be9b92d146d22a7c5d48336cba50b2a1cbba7d51. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BC8472500003.