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 0x700c9b748a0e934c0ea63d75e86d061a9933f447f57882dcf054ce9ef4ffc593. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f50de342-318a-4e06-a4db-80fff1685f5d.json and https://artists.proofprofile.net/proofs/artist/f50de342-318a-4e06-a4db-80fff1685f5d.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 0xafce7359540b52aa470ebf72e543eccb7e3a1bab528e6df1efb41b0898c4e696. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBSMU8710394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8045acc460bd616c9eff47d3d2c80f1835fff5ba207800bed871f7b6043e4cd4. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GX5MY2421316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6384534fb84061482195cc14995d20a4dd9a6cee0228c40b758a98b206165162. 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/GX5MY2409988.
I Can't Deal With This (Kyo Makoto Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73205122e46be312a20cbd2921bc68c0c718cf2a15af98f61ff4470e056c3baf. 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/GX5MY2442775.
I Can't Deal With This (Ivarancho Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840d7b21e5825827ca892910ca97c18e9b2185cfde3598cb0c225c1abdb5473d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GX5MY2408756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d2a0d18b71f41e42eb973be70adf09393b151795a85895e5358c3d7b8deb2d. 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/GX38U2418195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ee0ef347ad899904ba9833ea739264ee398d9905f9dde16c77c553f8786cf7. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GX8LE2482281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045fd15f7f80ba96dd3ff99145cab128bce5006f31e58d4f905cf6c4cecc7f35. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/MX2832414050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9281545fdd4e207af5f3a1af08ce9df9023dd9f19c70ebd854a6454bd536d9fb. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GX4R52336879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62c935ed1d187335bf9a95935366c1c99e8e58ba3491dae5ac5707c1b4e88e4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/MX2832311592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25685c59983985ebb30db18f2554f55e8b5ede0f25eb1db28e739e6ba29614af. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/MX2832312924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb039c4a41b9ce2ae7c87e5d57625ffcb7e1c35593b6d80facc268d215855fcae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX5MY2268858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8155655c9922fd423680bfa2e856c61e3f9fe11b00d4a4e22509b3d7e47c6c67. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX5MX2200370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5660dab14e28c3ca9aa445512d34d778c6effab9cea7be653209a3df7c6006a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX5MX2201671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655db3888aa3f87803c1319ee48f4e20b84be9c82358c2e36c4f8daa5ca1194b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GX38U2219961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28ee96040c7a12a08d107943172fb55c841674ad54900c4df28f6d3fb9f49ad. 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/GX5MX2143151.