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 0x90ca21774d65f26c1f96ceedab4024e43da6d8ce1b5a8303a72942d9c7d95110. 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/d2f0d542-8fc6-4733-a73d-127810500870.json and https://artists.proofprofile.net/proofs/artist/d2f0d542-8fc6-4733-a73d-127810500870.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 0x281e76240f0607da308285b75803e0386039c37ac7ac2a37113c5d51fb9cb382. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB2LD2310006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30fba72ec753cdfb848b01c8cbebaa4dc16bd564075ecc4cfa26de22f112f7b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2310030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017eac4e139423349fc4a8a4c74226ad7b7d4c137ee31e1b520d1b12c8a75c68. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA5KR2363044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ca047366e59a5cd6f2b7843190073f56d8d2ddb0d5f7d996aa0898ec103f53. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM3DF2272665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d9cccf628b7431bf05121fa01ef01d90fe7421d23f9af885cbfb1c86a21d31. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QM3DF2280077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fde0e3f8cd0230d661ac8e033e46435121b70cbf2f962dc77488d3b0138dc7d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2295118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e39863f1fe03682645892341b6d9cb83dbda68ee138ea9b0c2601eccc3837ca. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QMANG2237348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6abaac4b7b28485242df6d3d1baab70edad0b78b8db65e68d688c3fef6f4b9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:24:24Z), 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/FRX452439986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a8c96868ff729b223435e15da7cf4baa13c3e379e777be2dcd81beabbd72de. 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/FRX762466762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21273b552bdc326e8d1dcc7dafa6dae46cae185e05d1c7cdfffec54c59b3c0b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX872435809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e91a3614e147ef19bc44fb54124e5e8e17c6d7a29abaff7fbdd861105fac301. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR10S2509137.