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 0x2c776d60d133e1da044f76d9aaabcab7ea64d081258b5347e3fed58522247efa. 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/435c17d6-fe9a-4ae2-ab99-e6f221a4a81e.json and https://artists.proofprofile.net/proofs/artist/435c17d6-fe9a-4ae2-ab99-e6f221a4a81e.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 0xa7e07bc3637b6f813444aef08d597a3dc985ed212bdefb1d0221eee6e9d5e812. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA50N2110012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52fab09027203c0bc9a9e860d38cd7d6b9867b7b7724662c03c6074379ddad6. 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/CA50N2110013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626d292db9981a419ef695c314c6389c6ca02f3a85074b888a2619f87529e475. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA50N2110014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146449a5ddc399dde5a12a1844e8be4a01e23b79775d56c82c0c20c05a83348f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CA50N2110015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6289efda611ee6f03fb7ba1034f582db8cb90de2e75283f9f7d14f5dd0576b0d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA50N2110016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f63b76ca519c456a73f62bb028d7476e9229d3f2aafa88b960a504610ab422. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA50N2110017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc85265c34451bbd59a2c1b429afc3f9b4a38dd47bc52b74c15f1ae866e31692. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CA50N2110019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6289efda611ee6f03fb7ba1034f582db8cb90de2e75283f9f7d14f5dd0576b0d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA50N2110016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e07bc3637b6f813444aef08d597a3dc985ed212bdefb1d0221eee6e9d5e812. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CA50N2110012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626d292db9981a419ef695c314c6389c6ca02f3a85074b888a2619f87529e475. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/CA50N2110014.