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 0x12a84f4f7ec5c48877109b6909e4cbc6fbe72a3cc71c99cf7959ae3e49279bfc. 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/bd2c3831-77e6-4891-be40-48a03899165f.json and https://artists.proofprofile.net/proofs/artist/bd2c3831-77e6-4891-be40-48a03899165f.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 0xe34548424af326b7e6aa2209e8972add627987f330e99b81503a86f3d0c3c360. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:19:47Z), 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/GX89G2278957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c51716c8b21c21e2e36d9176a556cb80a4ad99782c10dfeeaa3777e3f54187. 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/GX8LE2365706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2175776ef93ce5fcd4a339d61a321d85cef8a1ce4cbf7cb5e2bd07692bc9c15. 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/GX3HH2303814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda09c6b1081b908d095b69ed50e3fdef0f36be700f9813985046c6ba1dec421b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GX3HH2378191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70874bd2e85bbf010eb1844095709efd8e3ddc3d061540034f3620e7753973ec. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:06:37Z), 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/QZTVM2392993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4ebb593f2cf64eb39f7cffec56b7860f67e603b5c6c4a808aceecf7ea70ae2. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/GXBDS2339456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e25112a78547a31e695882385e5ef475bf38506ddc75ef22ef314915e793720. 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/DGA0R2458571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f98f640ae14395124ad1352c164258708624bfa7c3613a43920100aef5caf11. 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/DGA0R2455222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68dde603419141d7a9b9af31a99ba995ccbbabf30a4cd5f148fc5a361abc1cc. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DGA0R2455261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26702bfa0f18bf1baea7102410c505faeac3b1116edd5b59d4583a818debba0. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DGA0R2455263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f43144b580791b7059b4d2c9793780d172e9318ae4e8d07cb77255bd64206f. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:49:41Z), 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/DGA0R2458291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b700d7300c7c98ba1a083b0c5f2996cf75bbae42d14efb508c4223d6478977d. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:41:04Z), 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/DGA0R2455751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47119abf1a06554fb618215b0a6f1cdb920f167b45c7fbe5d727a22d7790cb61. 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/DGA0R2455762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8c6aec25ca334ff069dc8e6a24601cb4aa14c159954e43d3df1907ea70af3c. 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/DGA0R2458350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a3cd7004f24f8bf4e2b368a88be62775277f33c2b04d4a603a2304aea1c0dd. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZS662541879.