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 0xb511288f67390f2e8be616bc933f802d723c3ea4656206c59a024390b0bad9c6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be5f6b3e-2fb9-4ca5-ad98-39d1a9f589a7.json and https://artists.proofprofile.net/proofs/artist/be5f6b3e-2fb9-4ca5-ad98-39d1a9f589a7.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 0x562dc020aca36e9d98f78883d6a1fcdffec4b57f62f4803241e413914588c4ec. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DGA0T2406402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85a1207d4ab2432204e8541c22967805ae49261b2276acf6641690c75fa2a98. 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/QZNWW2256115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08369b07d33f69d150f95a0a5543c64f1b09beb0e7ce950fc4bcdc17f344b217. 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/QZFZ22342438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1113664575b18404515174459f0dabbc192d48c282b5d33ccc1ba69829574e2a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:46:27Z), 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/QZK6L2344623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45e12d7a88bc86bea464eda897cbe5fdc763e8be3f2b62f522efc506d8098f9. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:24:22Z), 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/QZTAZ2357151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40542d4556996ff3ad1fcba6ad125c71d95cc61892bef14a41f1dd49dbd8941d. 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/QZTB62382300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e27b589a3356133a4b4df55766abf76343beec1dfc38ecfb28fb39ddbd134d. 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/QZFZ32401888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3451e0423497932458766273dbbdb91303f685406e2554d3975b88852aa4417d. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZK6Q2472904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e88974b8af1c9892f2aaabf3a57912323bdeaee1676082702b1792596fd8d6. 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/QZFZ72494493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d773f3a008ac3aca105cbb498bfa178de58a0db392a37862633d28e7650be55. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:46:21Z), 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/QZHN52441262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd548f7e5c0b6bc92b7f8c5bb428016573474389a960a39d64dd3e8739b54654. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZHNA2494787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e78e8a92dff15ef0c5e152bedff2f362a10ddbc96c648a9783ef9b973ac0f5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA0S2416501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c1d875a4227e4974ead4adbaa8850bdeba0b9750b7d58157d10465faf780c3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:29Z), 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/FR10S2537513.