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 0x2e6fc6c03fc416fc93f391e96fae407b29146616e6ab3754c76a6bea61f57ea9. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0eb691ab-b8cc-41c8-814b-a7b595b3237c.json and https://artists.proofprofile.net/proofs/artist/0eb691ab-b8cc-41c8-814b-a7b595b3237c.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 0xc2deb29f0ee791da258e87406e1df3c3deead868c1c21151e1a230dea4cfe9fc. 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/ARQIW2503633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f2727a44b6f671f5012f5954d36331412d2d1bd50230e227e99f43b2e78135. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:56:52Z), 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/ARQIW2503635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8903b7173e80cda88468217256fa2ce5dc1ef2e337edf3b7a426ad37239260. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ARQIW2503641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08efba2a29fb4af77b523b2a1ebe04b2185c6d84e22d2a3e54b38809709b5400. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/ARQIW2503638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5001adb6c1faeaec7c63933cf018a2cac4a79d45eb7a5bfc41806147fabf49ae. 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/ARQIW2503630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc186ddca17fb292f11fe07eeee2720e59a2100cb7dbef5830db71c01f3968d3b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:31:27Z), 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/ARQIW2503640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83807acd7aff63771c304eeb351fa25b6b5c720d8e6e19199b08230d8c1587b6. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/ARQIW2503636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46242cf8ec63e9d41b9d550076c95e73b08cffe839642131ecf70525b9c8da2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ARQIW2503639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9594691a25d666b879c242fdfed82038c43642f53e5e1dbff96dda3b3a57d073. 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/ARQIW2503631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f41af4757f5f729f678b7639da86437594d3511dd77605bdf02c8808a6ad6db. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:26:32Z), 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/ARQIW2503642.