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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8e546f30e34637eab78d82a75961b3652878d600f0dda222a388ec98c8e3cd. 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/be35a19d-7516-4685-8d2a-9d0f9c558fea.json and https://artists.proofprofile.net/proofs/artist/be35a19d-7516-4685-8d2a-9d0f9c558fea.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77c33d343f4c4ee18460fb5e9f469eb8240098aaa80acef0ebc9fe2b72c1f293. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USHM80991907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cab6feb954d279c4f99ceb9a35a84debed64ebd4733dfcef6f6976b9491bf9. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USHM80991909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edfb8813dc69313684299dc590b62b9b1a15aaf9f37bc888160c57c89995c5c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USHM81372603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47efe9881bbb2caa5c3828b7544c8d0a415dbcd7ec65c180ac4b942dbc644837. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/USDY41585953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9e5c530162e26088bd62196d16cdb046c114f1a1d915763ba73f1f8758c7b2. 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/USHM81771457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11c530cef89c87d2bac5db71b438586527104bb59049f6041524b4f8ed7016b. 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/USHM81771458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b7963cc9cef63e36fe105944a9c758742c3f2c48fef177f881bfaf846a825c. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/USHM81771459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e80512d7dc88b967d04ffb4074bc9d7dde7af6f976c968b3480521ecb1c41f. 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/USHM81771462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce07453ee528aa022a0ac0722dd038e8986b043122822b1445f3c63cd52c57e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/FR2X41846520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44acc8661279cfe331cc8165bb42079c04e3a6218b1f085877f1fea16c7d116. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USL4Q1966606.
Aad Sach / Jugad Sach / Hai Bhay Sach / Nanak Hosee Bhay Sach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd7fad2345164d0b517b1322e90c818804e374ab01d2a64c667883fe7387230. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USL4R2051429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4cb10320db6f0ec5ad6a590d3430259231099fe371c189417ba3ac5f24fd8c. 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/USL4R2051430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0128df9e10782e7caec07ba6c5896dd2260ab350a28b9744ce40377089af7f33. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USL4R2051433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa8d3dddbff871a24acc52aa922ca646f7815c1a1c5d15c3c1bc1e2bd58cf5c. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/USHM22199479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc942cadea3243998e4704601d4c44bcd97fd6f5d3b1c7c7744e3beafcf6e771f. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USHM22199480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e1de5235e57be61521ab8f6cc05cb73b38d292f442b19fdd48f4715d826eb4. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/USHM82552782.