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 0xd642b090daf9b25a6b21234f56bfe7ba344ef874c91dd3e6c59b7ba6a200b187. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/522406e4-5a09-4531-a0a2-3360c16bfc0a.json and https://artists.proofprofile.net/proofs/artist/522406e4-5a09-4531-a0a2-3360c16bfc0a.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 0x3aaf044c9dc4da9d1558d3eb2472faa855e7152eb30fbfbcb5400524cf7ba88c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:43:35Z), 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/KRE022200077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6db86cecc22f539d710626f7c348807ab8df37f22c35d5d60b93c6044ed8073. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/KSA002371709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cfccf50a8f530689564a815996dab3c7d579d263d5b764907f23ab5124b88b. 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/KRMIM2441108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a01cb4a6518b5d4931330b25b48b9ae22e9ff7a2cbc662a70afbc7113cf3e3f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KRMIM2453838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb869f9a4697ae52e90c1420ac42dc6744e2d01ae47d4de5ada3669215f39fe. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/KRMIM2510553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633aa4834656ecd834538def260ddcda00e9719aacd2b41812a87f4295b430d0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/KRMIM2510554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6f5dac563e7b2ac957c290fda9dc61ec08c34fb6960b4133dffa739caceb4c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/KRMIM2510556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f19d44b86e5c5b178450c920a7219878633e3f43951cd03b1a7304d444a8e7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/KRMIM2510557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ab659389a9c97dcc1e892279bc8c6f8e5b43767ad96c2ffb564170dfb3a07a. 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/KRMIM2510558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9758a4dd093ef06e5377e80e5786a0043a58170c565123bb4342b8981ed44fe3. 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/KRMIM2510559.