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 0x7a3837d63c991fae7ac113abd9aa05c03149664c559c468f786643d73bc16692. 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/74147fc3-1f03-4e99-b5dd-8e8d2564aa82.json and https://artists.proofprofile.net/proofs/artist/74147fc3-1f03-4e99-b5dd-8e8d2564aa82.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 0x06ed9aff0fdd0be77dcf91530b6f5e99043cae9035ca79fd3aebf1d006f48a54. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBA2479457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be37f6b6dd5aabfb0b4975192b3ef07f10bddeba21af4556706ef31b8590e6a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:51Z), 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/QZWFS2450097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb547d26a3535af5d8fb570c21e4f229d296eddbef1ba5ab1e8e213ea9e93684e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA5KR2518760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb547d26a3535af5d8fb570c21e4f229d296eddbef1ba5ab1e8e213ea9e93684e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/CA5KR2518760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb34755da50ade6b57409ba17008bdf22f284daa59d0bec825ab2af7e880abd7. 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/CA5KR2523997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34aa13a65de32edaeaf5e8ec79d7fbe77eddb49a7b1a84f09f3e4a1146f9dba8. 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/CA5KR2535394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b6ff4578c114378dbb0d023a2ad28a5be2b8ce8b4d2b3582d89b438ee57c37. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:07:20Z), 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/CA5KR2536126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0421a04f1109ecea76cea433c444855a829debb0f82f17b5f8faeaee9bcf28ea. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/SGW502508426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa417cba965550ea34ef903c30534b7fc3a88449f1c49daf58515917d59da418b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AEA3A2079363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c28d7e433bbaa5e785b2b3d56bb30a0697d22b63cb11dff8e2f5f59fc97b406. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:24:11Z), 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/AEA3A2004596.