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 0x691bba532ebd5e5decb06b12efca35366213a9046ebade695dae84658a0bf245. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f621188a-85d4-4fd7-9953-856c7000d30f.json and https://artists.proofprofile.net/proofs/artist/f621188a-85d4-4fd7-9953-856c7000d30f.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 0x52fc4a53afa54459dfceb5f390d7ad94c2776c6497dd1cc2edb6a538f6eca543. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:54:36Z), 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/QZTAW2216811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3507beb00c203113e13287f5fdceb34c40a7371971df73666efaded0bbb7cb. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:13Z), 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/QZTAW2216812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e304f6756f3178930e6783b3f8a6380b1b42fb4f81b966fec893765ee2101fb. 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/QZTAW2216814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a8dec2e9046c9ed4934cccfe98d8f2ac277a5841973afdec8e6af7aea79078. 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/QZTAW2216815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345c6fddad5e2c094bc45e19ee4c2c90be007ddd9ebf130ce0e4aba78aa46e26. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DGA0Q2488512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f556fb30077683b60cfa7abe43b78f44728e117335a404e2f93f0b55eec1e37. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/DGA0Q2488510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebee3f70e8f4a99c0ed844df2fe40dbf37ff53b54e003cd7c5fa4abe6c6e0f8. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:07:16Z), 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/DGA0Q2488508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6c94596ee13c9e5d12a7b8a4e0b8baf03d3f95abc9e1bb5244ec7b03ee2eab. 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/DGA0Q2488506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fc45a4225f2106248187e0a4e438e1076b9dbeb7ba4d13c1111531aba24689. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T10:56:08Z), 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/DGA0Q2488507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff976b5b85785a4930735dc28206c66b48483a10b6df79468836d6c32ed8ea2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DGA0Q2488509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345c6fddad5e2c094bc45e19ee4c2c90be007ddd9ebf130ce0e4aba78aa46e26. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/DGA0Q2488512.