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 0x65e9c0a2cbec1316b79a507e13ec8a449c500c6e0daabf72af45aa4b60f7707b. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b91b4c4-e785-4efe-9e2e-216183422e04.json and https://artists.proofprofile.net/proofs/artist/4b91b4c4-e785-4efe-9e2e-216183422e04.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 0xe4d98b352b98145f0d8696266e0f73a0db53e4f8edb1987662b0060c8608ceef. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZMHM2528753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e19c0906ea62eb5697ddd66ef8e7293e15c47f3d291c30cbed8eb59fac12d3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM42K2513267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d1846b19de8cd480074d57c77fe2feb755890cfc0a033e82ebdb0770261b82. 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/QM42K2534414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a4fd2e731829421268b170c01cf7b9d9a406e0b23f7ef0d81a38ccefb7a0c6. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:53:46Z), 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/QZMHL2588025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b7a0747a092cba4613ccf27fc97f8c1c9d0517c191404c3fb3e80612e54a56. 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/QZMHM2513931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b7a7bc933abe8aa4e3380fd83335d8023eceb81d14a25c267d765e6d9ea26a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:48:02Z), 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/QM42K2562518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f83b797693c7ea534fc332e2660d07cb95ea5e3980d59deb727a0ea02a99f64. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZMHP2587401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c796bdaceba2c454aa596b39c22f5eeb218e5d391bf7e9316f700cd2fb59f2a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:06Z), 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/QM42K2512266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa405d11d8e96644aa88d45336e9886594013c7a52799585babc90247af008162. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:02:38Z), 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/QM42K2572414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2b1154137db0dcd4cdbecd3ecf0c75b4adce75d4ebfcef43da685844365bc7. 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/QZMHL2578279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5a32555719f2564b0447f287b3da371fb0f2e672f99f28d5c519fa1aa4c1fb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMHL2523150.