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 0x7aa2e8db894a0f09d18291e0b03dc417557c6f8bb1a2d2c9fef2d1a5b4dc6aa2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d45390fd-4a90-4a1c-84a1-fd2273554394.json and https://artists.proofprofile.net/proofs/artist/d45390fd-4a90-4a1c-84a1-fd2273554394.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 0x301b865b9ff0a859ffedfe8b65a0ed01eb858c3d651bed4acfde0b460481b716. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:53:11Z), 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/TCADW1838370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5061acc05592bce87a34ad77e101b2b16c55de30148baf2c31c054d509fca3e4. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GBRKQ2148211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5052e7344e3c48e5e3d125cf77b4324892f72aa43a35957ae9817d1c11d0260e. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZVEM2374315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c7adbbe47e1a3bc7c94cd1ba26e8cfdfdcb96f59324be74a76388225438b12. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZVEM2372050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa028f9eeeead481e978b91008041708bfb3071f4f3590c08062769deeb7499d7. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:55:38Z), 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/QZVEM2372052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9082fd0d47ad714e2bedd2a5fd9956e5948897a0270583d4962d70a8eb3bb7ed. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:48Z), 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/QZVEM2372053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5728e21ee0dd1b26df654ac8f5dbadba23da9a7508d8b9b88bda6954a55a30e0. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZVEM2372055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16da2e3c62850cdad3d9d04e3bef477222d6ee65f1353b3afa2ea57d1310903. 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/QZVEM2366115.