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 0xf8e6dff90ec27a5a73b99bdcbe6ef3996e34d9588b075b9fab94b972022b7834. 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/808ad918-c382-4c5e-9d1e-50dc5de92d31.json and https://artists.proofprofile.net/proofs/artist/808ad918-c382-4c5e-9d1e-50dc5de92d31.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 0x4625759c84afd0cb8bdea6a94ac977bfe3f697a09276c928bfd49615d32cd6b2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:18Z), 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/TR2752100814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f849645f681e481fd20db786dcd997620dafc5d145b2312dfaf5db61e2033c. 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/TR0950600616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302f938e79f3059db7609e252568d71d66b3fdff4fc764f403168a238b8a86d0. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TR0950600622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bb6d6d0010a7686ee505798653a5d1450e6b42a34113860f5c4c98db888210. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/TR0950600618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe4bca1e87ddd37478430fe793b5f16a0af8b219ef78961f9583b303c40b259. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:16Z), 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/TR0950600620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f338b6c37d50a8ddbc5223bb036e96e558ef24ca1912777446379476e0faaf. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:19:18Z), 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/TR0951001167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec9f417a0c2335d989d79c92c9ac71e969372a702ec4504a26bdb223d2f6e76. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/TR0951001168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dccbe26b5f5b4212b9523d587024083101214b355edc0d3459dc75ee1bece7c. 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/TR0951001163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e41758bb6241968ebbe5b824dd1104dc3b3411924dbaf6c6460e734e120694. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TR4040800059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc2e3eb5cf542e1c05e42a7a0b9f14e40e27f7479b67391dd72b7c3d41a992d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TR4040800062.