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 0xc8ce0c9c181715f73565eb107b3b8c457aa00b661ebdd38200545ad6688cf8f3. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24993b19-a8bc-4190-af92-40d53dff7fd4.json and https://artists.proofprofile.net/proofs/artist/24993b19-a8bc-4190-af92-40d53dff7fd4.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 0x07f28d53915385b88837db384b387fc6a558cf56fcdc3fdf11cf7a7444f195eb. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZHNC2486970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8101f9a75fb39cd936f360b350907bd74c7bc567235a38ebd4f925aca0e42e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6G2519033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b6610e2b7800f1909a24d54b9dc263cd417aa8461bdc9e30bdd74cd3b697d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6G2519035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24388514c7da7ebfef19a7369e7d851e03f5764889248af78d58c31e5b748835. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:07:07Z), 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/QZK6G2519037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14cfa61ae44ac19b434a9f7eabda43c8e52277bd5e9b50eb6e0ef9c3b74d781. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZK6G2519038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cd85c894d616dd5af1c3a9dc1c028538bb5050ae02933032bda1bef165c015. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6G2519039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27f8e95c3e280783d416e3e0b8657e70b2a160d897b80c6b460abd30ba5ee98. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6G2519040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b0f21d05ae2804f3cbca6943a9cbd16b75e7771474c5438f109dcf6f46f0e5. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZK6G2519041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689241c5512056eb065462c8cfae331a0b06b2c540ff83197c86c0b5a6046965. 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/QZK6G2519043.