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 0x115396c02f6b1740630af93fa6ac6beaf80e8e18fd4157b3997b27681edaaf50. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f63a2113-8ee0-4f6c-9bd7-7fb11a45fe54.json and https://artists.proofprofile.net/proofs/artist/f63a2113-8ee0-4f6c-9bd7-7fb11a45fe54.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 0xd9bc5b3be64d9c015b50e6d2082588ba3a4752959fc6e37de3ca297d7cad37c2. 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/QZNWQ2143405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d5c85409b4986343a81fefc9b452d85761978b322f466994d6f2e897ffb247. 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/QZNWX2082596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf496cfac3cf5f4eea48520fdda2275c9acaeecce3e326512b20c83ed82621d2e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:18:34Z), 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/QZK6P2293041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc529d660505c2bc994b10d98ea6a6f851cab828e64ff74694ef257a87a0a59fb. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZMEP2179396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c88aaf683f4d6df1f01890bc65b196c1a40438c339ab67b83591d92b0b17d5. 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/QZFZ72330946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe048c9719249b85a735d1a1e1c1a024fbbd4733c8bec0a10463213b29b36fd2. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:41:21Z), 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/QZFZ72387846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c88aaf683f4d6df1f01890bc65b196c1a40438c339ab67b83591d92b0b17d5. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/QZFZ72330946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c706813251533739c90720b879db2330aa65e438725edc559d3443b10cf72f9. 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/QZDA52472470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92fb62c338eee19a88ce4bc26651da7c94369774d35ae962ef12876a1b493920. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZHNA2552293.