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 0x9f2a792c1fb3be0a0afc6fbdab52cc403561e5bd0804176c4e865e95516d37ce. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/452c0105-7ab2-416a-b745-018f101f4636.json and https://artists.proofprofile.net/proofs/artist/452c0105-7ab2-416a-b745-018f101f4636.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 0x4ab57250272a28f1a5d298c95b23275ebc35c8219f4a7cb752c27dfdcc46403b. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:34:30Z), 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/USHM92093036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12095ea80fff60e8f2e6067b359cd427b6567abf1abeb5ca4e0a6c1353ae6950. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM92093037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe55e6ec27b708e37c20a1bb78d33f7e25c2842e5a235578badc6850013d2e592. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM92093040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f948c0172bd360534569bd103c8c52726660b6ce4bc1334899d6f36a12fe3f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:52:07Z), 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/USCGH2216175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ce9210bc0de302abd9417a53fc0e2b3be5a5fd694792bf322b8a7a869c4636. 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/USHM22251237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780111bcdc4c0c9deb1cbdbb205789dbdd6f6fe1a22537c3a65e24a50be5f496. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM22432232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba0f301f80d048ab72bd5f6fb5b963bab5194befab109a5b1797324a52e3c43. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USX9P2474809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ffc3d6d8c25f1cb3aef1aa131930f5c6490c4c4bbd770e34cf80f7502252cf. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USL4R2529060.