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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 0x5008debb001f84e675270debbe0febfc6bc7b43c8902d058da38e9754fb833f3. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3711b4d-d4aa-4777-94aa-6619391b3a5b.json and https://artists.proofprofile.net/proofs/artist/c3711b4d-d4aa-4777-94aa-6619391b3a5b.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 0x5101a652e9c2bdd6d06afd910cd8f10e8c47582d02ad12f7365d8a19549a3fdd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBSMU2853726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf794e1ffe76902331bf1e84c3d63a40d40e19b8bef04acf8da8ea8d72be3d2c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBSMU2853727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fd2b78ad27239179c5a38163fc85381fbf83a9d696b2bcf5620c8978757e40. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBSMU2853729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3176a5e50d5e458edb0e31c905a90cad97f84c6e326db6cc209ce2c3a7e9b8ee. 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/GBSMU2920514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ead275266cc85710ebab2470bbb421cb0ae718aa3be84957c228a775e16a5d2. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GBSMU2920520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723b78cbd32b36d3a0a8c4fdf6757b8a6cbf8e2eb9b5263dffda2bbabef68b60. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:37:07Z), 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/GBSMU2920547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2745bcf22c557e89727519c7193605d1a74d0a3d58c16aee8aa5111aff526b. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:48:49Z), 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/GBSMU2920558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51be2ac374823a6e3edefcb20eb12f2ee5d5b836d935c69cf7b4977d20c434e6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/GBSMU2920578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bf923ba15f0054beddab919f1550e9041a20bd0670387890b9f44c91f26c81. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:45Z), 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/GBSMU2920603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa60ca19785c1c8532cf8825e0ac6691f33c33e860be3f8dd28736ef0efd03b. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:09:46Z), 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/GBSMU2920701.