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 0xfb93dbe7fcb6e2b71072a414158a1d8d2456f7e0ed1e95e3933ee24caae57c7b. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e224be9-9ac3-4436-84d1-837b1143ea8e.json and https://artists.proofprofile.net/proofs/artist/7e224be9-9ac3-4436-84d1-837b1143ea8e.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 0x403c207d877366bf67634609f12cfee1e7fe54a4ce88a7ea7bd38ff395283cae. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNWU2265874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6aac1f5909c4712930dc53e9b56346d63e4de2ea125b5e707fb453dcd1b367. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTB72239857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efe6826fdf7b202ee71c7c1da99648f7f551b89dd0da4589891a9550228c19c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:27:42Z), 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/QZFYY2351676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b49d08e4dab6f4214a24411064cb206928ddbc48162b04d47fe2cf84e23f2b9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN92345800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606061091635159334c388f7d4efb051ca3a852fff8e023b25ee74fd0d07d827. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:50:50Z), 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/QZK6Q2323203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12dcbe421afec9763a011d9646fa4bd32de4a97c6564a4f167a28342f5a75bd. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZK6Q2323202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797e68d1f3f9fb124335ac7e445525a43da752e1aa881c44a6ab360f5fb316dd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWFE2349951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a207f17fc0854e0834a9a4e0d63dd45bc09bfecbbea42763ed57ddf0b54ddd. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWZ2424214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8801f277d55e88abff4d3bc118ca1e48a683ecb3fb8351c6f2ca6e442a3e33ef. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB22540938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1c8da75c35f9d54b4f73bb5fdc697e5727c374a49deac2f0840731a032225b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:16Z), 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/QT3F52552274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39bafa3348e0890b07ca1f557cd11b7e7e00ddab67d56f733ae1d6e8d2bf023. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3F52552275.