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 0xc58489d1b6c076003ca1b674b51496e31ee4140f1766211fe624937f014c69fc. 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/4773f449-a3fe-47a3-ad93-0e47feed3232.json and https://artists.proofprofile.net/proofs/artist/4773f449-a3fe-47a3-ad93-0e47feed3232.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 0x11a71c2ddbd4b5fb2a20166ebeb14f43ae2c0f597eacb5ec727f73201a121316. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/NZAM01902296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4505f6c1e9de528288f33bd39a256e3768e0b500940da034dd08e8a93b4fa3d6. 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/NZAM02000090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96b7a5bf21f12799396538abdbd99623f67fd64cd51c6890a330d120dd96642. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:42:32Z), 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/AUBEC2454534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d0a1a051fae7bfabde36c89c45c8cf5509c0b9f0cf38ccb4d9c4763e36e3f9. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:59:08Z), 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/AUBEC2454535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78d77dd67b7c25f10755411a671ee1eb790b40940c904064591c09f065dcbb4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUBEC2489647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca4b86c2a5d9e501bc5d8b69d3646d57d4231a53a8ee6651ab413c93db8e6e7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUBEC2547024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed672907e680738459d9fa43e6327ac131be1f99b62c4f1568ffeb6e6843ac90. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/AUBEC2547025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1c6c3dbffbea51be8c2f4f10d627741841f774b2e88892282aa40227e2f616. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/AUBEC2547028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687ded4acf46a84391e8c0a31bc1e96329795d3184ed72b48fe96e29e7c23e99. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/AUBEC2547029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd4950ee0b67dae9021db472d2902a7af67cf31b7c8397c71c421c92ac1959d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AUBEC2547031.