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 0x3fb9edd0a52f4518463564f3be6c9f8faf6dea330a9d6828d9d38f6488b8e39e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3230cf35-866d-4722-86e9-487cc10b455e.json and https://artists.proofprofile.net/proofs/artist/3230cf35-866d-4722-86e9-487cc10b455e.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 0xdcbb87f51483245dd17e2916fd938bcfb2c8f3a1ff4129786a7a8db59aa173cf. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHN42177721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde10e8d33d2280dba5d82cedb6baa5b223a1651e5f582b6db5e96fd39cb8b2d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN42178997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb7ca46e25e2a33989a149f8874e01b7d8b33a52957dddc5ae878d177b18a50. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZHN42179020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d915b314bb0b9a788c3318cf2ee9a2348b8c531a28eb2c71c790e7c3db5c29. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHN42186756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa172c38954d492048c644d5473a6a84ca6e16ffcae071555a4d32d9e4438fe57. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES52313385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae76d9a9e8d8a01e884fab64a3ebdc36ba08e4cca46746435a582375a41fcc52. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHN42330607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8943c8c9ef39ea032a4279b1bdebc5f6c5c39a622f8f13d5c9123add37988baa. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZTBF2331585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f49c266fc57292b8e3fd8542f28fd112fbbf2b500e8b7d4bd7f33b27a00fc7. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFL2326318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5371bd6e715ada8368b1f32a612b468feb07d839c4b54c534a76bb7347d524. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFP2340250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1d11ee93c1e89940d42753111dcc3204b9e99378a9a39da0ce19274d085e83. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6Q2472949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed923e1c9e9b3ad2ce6afad854119b2504e3ea0649835e1e11061078fc37920d. 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/QZZ7X2460741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ecd10261515292d612a9e5707fe44669427cde02b822c97ddc1ddb6743f056. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZDA52593954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fa68a17d293b9846402863035e125e3499de352a56219aad499794fcd30143. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA72551590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89e44ed96f5ec6c5b92a0a8ddd864701502d9cf1c0ef4cea6eb9a57a5c078d2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZES72558792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c9784ccea660e3cb1b19810025ab734b0eb3b2086c216304d91521568f5b15. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTBF2590678.