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 0x4e0a2b07e4a031b52457c878bee354358ee82352f14077e1dfdc29a00609565a. 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/89078849-6e75-4be4-a77d-61698d3ae630.json and https://artists.proofprofile.net/proofs/artist/89078849-6e75-4be4-a77d-61698d3ae630.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 0x73478ec852b4fa1f97a0c9ce624f7e4fd0d19891738075a2b32633e039006343. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:25:53Z), 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/FR2X42441197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca2902e4946d1e549a850237d048fff354c6fc4ed5f2e399f20a86306ce44ac. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR2X42441199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813d7ca9ce993c600b3c57dd8f668e22d0223afbcdd4aff6f01ab29096b1b2ce. 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/FR2X42441201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d68664f31212794da022630ac5f0fd5f0b374776ef2708b07ea4271798708cb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR2X42441202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace758814428d685ede98b355640ed5b0b8dcbd0ed4a54f6b295e5438106f514. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FR2X42441203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065d3758dc12edf264701b11b00d6126888ada50003789589771a18fd9c0756c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/FR2X42441204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39f9c6a55f188e85d02cab8cfd21af58b6d534038de3b3b2bdc11402abc46e7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:54:03Z), 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/FR2X42441205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0145f80c8fa34dd8e328e00ab1d1db7039da561dcce4b125a92f470b22aadf. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR2X42441207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522cefcdfb7ba70ff57b60c794af1d38f538c4a5ae3d265e84bb7dda539c0d59. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:12:16Z), 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/FR2X42441210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4271f3f3232bbf504a439776113d1d0f4460af77390800040850c89e64d22ff1. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FR2X42441211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59416669751f897370783075b0bb30b4d868fb67127ace43dd4030e997cf7fbf. Chain 2 (Bitcoin): anchored in block 957685 (2026-07-12T09:26:00Z), 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/FRX872444468.