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 0xff5344bfb56ac054e668a9c955cb5b11b6720803f9dc9d085e03e73bdb692c8e. 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/19e8c64b-feb4-4736-96be-7bc88c0f6917.json and https://artists.proofprofile.net/proofs/artist/19e8c64b-feb4-4736-96be-7bc88c0f6917.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 0x9643396122d51d064610846d53be4a33966a53707632c94ba8d3ff6c418df3fb. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCABB1176055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3682c7f2e92971f2a6b9ec5f7ecf53cc25d44052b77fea95063bc64b0b8ef36. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCABB1176071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a52ca06300f67a29bd30e38895a77d9a35a6a907476bb911b601435e12bb86. 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/TCABB1176109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b19f3c2401a31caddf803429d083f88640cb081b56aa1cc0d1ab099f21b079d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:10:31Z), 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/TCABB1176112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca1f4d4144a67d2784ab6fbe84b351153b02178e65f07aa8e9f6f2da4fc4d50. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:06Z), 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/TCABB1176120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bdacf479d7d245e52eb8ffcb6e999c824c2a23be479b78acff1c2ec6bff0f0. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:29:42Z), 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/TCAAR1074269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bf871c42d01e78e0dad7efe453884feb270d1e10f5b9995c7875197850c9fe. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAAR1074270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79788718107ba4ba957c83b8fc4b529c4ca0086b5e8ce87c89cd2acda0e451c4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAAR1074273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fb2ad06357db54a0b2525f16e2bf656f804463ac845495662bba40174d63eb. 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/TCAAR1074275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf82e2f731d2ac69eb25abd3933111fd756fdaad74c898263a7eec8db7d05b6b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAAR1074280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c59852dc4e7eea2f0712651bbfb5db8d15607cd4f17164710d2c5236f38c371. 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/TCAAR1074285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1b88fa5ed0e4bdd93f18728b16cbffeb369f78f3613004f8838c9c7de99973. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAAR1074294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd269faabc9ddd49ae50812e8c437bdf0d37f6a70f3bed0d13761b421aeaa7c27. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCABX1439214.