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 0xa0df029add6f5917d37a154afa689365f9a48557c0b9a6ed4f086e771a1b430d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32fd20b4-a61f-4892-813a-63dbda5bc3db.json and https://artists.proofprofile.net/proofs/artist/32fd20b4-a61f-4892-813a-63dbda5bc3db.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 0xf9f7ee9e4e710094ee32c8240e4b9826fa862880b0211c36279ae644830ebffe. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARC572404550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2f283775beac084016b46b66ad00bd958407c35eaddab8eb70bd2e48f3fbb9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARC572404656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9077a1fef8f197cab047ddc2cab60e5da24bfcbf475d982dc1a9b80ae72f6cee. 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/ARC572405216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12bb39d6c32080be870ed4e8a3f63271d75e4e879d00b7284eb4d3b0f1ee6de. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ARC572405246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0a2913d7f7ff34dbe0e3e7d988b94ea965879334f140056972450614ef3708. 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/ARC572404334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e5a1710bc83a0fd07a44d60bb9a07eb96b978a06062498ea9d5c8e5dff656e. 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/US38Y2517987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c156ad528fc17f987e1a6db72cd4c86943175a16a32598a5798386ef2e64402. 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/US38Y2517988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe656ae2e0d66ba9333e6189865a55f252e6582ff17a46763f3d45b33b64335c6. 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/US38Y2508265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca48a79f0ac158db0a9e1ec43c0f1e7b85eb65f4da89e277ee0de6ad0765ee6f. 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/US38Y2507962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf836d14297247cd1bc9437dedadd2fa54d9a8004c22ca56d26f4c7b0e7b3de. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US38Y2507354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1857a0eeb8184ea0d91e45ec0145fd5d30af5f0da505ebe16aba82e17bff7b92. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARC572406963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd7ffa6a6087ff281d111fae6ad904e697d856abcf1b2f35561704465244bac. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ARC572404722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2310b00da92fc7283df2b6644e0038d4b7a1667ab2b403002c0540f542552e6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ARC572404732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3b5e3517eec9edec053c23ec993a782851165ebd264c937fe251c8405043eb. 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/ARC572404710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2518bb1e3ce95905551dd4297d11bdeadd6ecdaaf1502c5ecdcd263955fc6b3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ARC572404725.