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 0x5cc26c6f29116313936b9c0ce5480e44c74c1ae526be4b871f80b253db35b4ee. 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/0a101631-6dd5-4ea0-9d80-da4aaec35327.json and https://artists.proofprofile.net/proofs/artist/0a101631-6dd5-4ea0-9d80-da4aaec35327.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pretty Woman: The Musical (Original Broadway Cast Recording)
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 0x9b2b8d6b9f9e37a505185fc6440679b7308d1e44784a3416f132b70799c5476f. 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/USAT21810563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3479db9e451b664ca959ca66aefcc878ee2cd8220635db6cca0f5f4d6cf98f. 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/USAT21810565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287f663611c166d56e16428b41ede8be13d160ccc8e92fcc888f283254f0c5f1. 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/USAT21810568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe681d7ccc50623e88520c4fd02f0c97ee2717b9d18d372ba6d33cb69a22c1f9. 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/USAT21810570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5b50f3b8a1c266141468a316fa69e3e2873192d5335f518d3a6295ef402f50. 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/USAT21810571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58c313dbcca40522fc7285b51c7acdbe7fe4a21fa4e03ac6db443c3eb2cdcfc. 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/USAT21810573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1990d209be6c5d9e04f8fff276c656c2679d5ef6dbce015a4f3be7569a7108c1. 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/USAT21810574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e0a0ef47afe13feb05733001808695943774803d54115fba91d49b4ebcd079. 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/USAT21810576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5efb21726ad96d05bd8bea7fdd9550b5a6f5f12ddf3f0284a86ff926583100. 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/USAT21810543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef781d0d321aeff133b78ca1b818a3977c1ec54fbce613284ff8111886d99f2. 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/USAT21810542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab02d2f901f1ddf95fde14d068d9209aed8854ed4ecfefe1d4875174013c4d9. 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/USAT21810578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a032ef17e7f85f2f333dc338da6c9f05e23420ac8e1980ec6c385909bd679fc. 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/USAT21810579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ad710e9da7db043024f814925cfdf858ad553a09f655c07e264756a567a450. 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/USAT21810580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5efb21726ad96d05bd8bea7fdd9550b5a6f5f12ddf3f0284a86ff926583100. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USAT21810543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ad710e9da7db043024f814925cfdf858ad553a09f655c07e264756a567a450. 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/USAT21810580.