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 0x2dd980e48b92a888ceb5b28985adfbda57ee869ad6a730ee80e976724ecdd0c3. 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/2f39fe54-0031-4c08-868f-2215b641448e.json and https://artists.proofprofile.net/proofs/artist/2f39fe54-0031-4c08-868f-2215b641448e.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 0x5fe3911f2cb3b13c3759ce8189e8796cec1b2e5d7f06a761f99abc41346e8a30. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBSMU2661096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732d1c80d50b3a5e9cc049f26759943886d53516acfdd64587ba9aa4bb17f154. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TR0550600032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f86559ded311405c127e9fe3e75d837f563154035e148df4c19f89ebca24ae9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TR0550600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b09566c1bd7373484ca1b09460742bcc83663db9327e98647ea1b23d85ecd7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBSMU2464056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b057f184515005934c6c3309fdf3c85c321b339891085e2c0cfeac925432ca. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBSMU2464060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bf88b3d36976cb4929b97cd76cc8eb794c7b3f710c239076c288bbdd5acfd8. 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/GBSMU2465330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9708de95da5fd6497621ae87c31e1f507408cfc3aea1e8404526fc5df640fe. 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/TRAFG1400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c24452c6844d187a3120d6a0c6d1552513a3a39df7c5ce8720ad7850b2d37c6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:48Z), 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/TRAFG1400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bd033538f263418a5b8bb1f59b3e8e911dbc416afb658a2b26f86b5e362676. 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/QZWFJ2361493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bdaf8a27c7f37de56a88337180da296dca3524f9b9635e6f0fff3161a93e95. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/QZFYY2405776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ab220342e139887b359d287a7e362d60d8e29eb69846b625fd0d1caefc55dd. Chain 2 (Bitcoin): anchored in block 957695 (2026-07-12T11:16:12Z), 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/QZFZ42415370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5991c52d7bd81980f8686f7d22954f5f3c33884b5ca46ea91921204274145a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:43:42Z), 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/QZMEM2495192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123c229dd66ab65d7ef147ac6838307202249401acb66290127581a14c90b066. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWS2439346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae2bf23e997bf9a833b3ceadeb958156da3ce9bdab1fb9a833464b98342fca9. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZNWX2443614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc227b15100e866a0b8ec0cd8206c3fe356026ffe4f3067dd81874e6de5cf4174. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZZ7L2432580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f78d8b29afdc62cedfed872e796e67a5cf71f738ec9b2a1faa71ed595d93fcd. 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/TRCLH2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5496c30100ce0165b3cd2e97844a6d5b9d82a2f45845f02f612df5d617833db. 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/TRCLH2500034.