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 0x3ec39802bcf0fbe7e4999247392cc63a61f342daa150573a430cb41b412d5dbb. 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/fc667174-feac-429c-811e-41f7315a1bcf.json and https://artists.proofprofile.net/proofs/artist/fc667174-feac-429c-811e-41f7315a1bcf.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 0x06ed8e00117844fb413c2072a6d71c00e9a94207c9c3e48eee01b6d7f3d9b526. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR6V82513240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd062105c3d29eb809f56a149201897c11bca3fc76500158db707ab91ffceb67c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:19Z), 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/FR6V82513241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91651894416212a17d99b34d8127017ad24e2f3a0996a55e3d7461527cb97311. 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/FR6V82513242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadfb6fc64fbfee67b049339571b2b72ea28bc4409f66ca8aa3c461bc8043f4a. 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/FR6V82513244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fbb1eb193642d99a23d2b02f3c4c8d735537dfa5b2731613d3cbfaa6c3e710. 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/FR6V82513246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310cc83a10ff8ad531021d1f449202810c46635c5beb7fe0da5f98264281a819. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/FR6V82513247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c1bfc6a682fd7d511d7e06009aef245e768e6905dcd4c02ba95d7615d00dd7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:23:54Z), 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/FR6V82513248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421a79e2df71a4552e6467fbcc482ee26db4b1369f016a6df24078fbdef1308a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:21:16Z), 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/FR6V82513250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe021a70d0a5237ecbefe617175f3e0932c2a6de3a5d75a11a8340c6b5b87a26a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:25Z), 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/FR6V82513251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbb20cd1ec70a5ab3e39fa0def0f048fabdeee9de83a4762f88ea2295b9ccf5. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:47:47Z), 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/FR6V82513252.