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 0xcdcc43f638f9b8a8b6b676b8c5c756630bace5c070d5abc064e234f5cc9e8023. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ec8e224-9888-404f-aefd-c1f2444310cc.json and https://artists.proofprofile.net/proofs/artist/1ec8e224-9888-404f-aefd-c1f2444310cc.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 0x7f947cbe13ed1c503305ead3760039108c12a2d4355d0eac17d7bb4288d15f20. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/IL6652102940.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71aa9546fb79af9d708554e0a8095a21fb994cbe840fb56165b36256a8e36a6d. 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/IL6652307528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d81c9833eb72827498a5e8b097fb1ce796592df30504793d27750ccce7809dc. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/IL6652307527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c8fec5fdb9cc0cc212835d151352999b52f45db13fea94247474a459860f65. 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/IL6652307562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9292f3ea63837dacec65b626640b2752edab91fd774532d689d672f0f315b0. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/IL6652307563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fa21944baf913af182c7f77f0e09eb36d5cf8c0ff57392911d78a801f39687. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE6XY2554626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1180f26d0a215881767d97a7ad7c3cce7f97382ead28048aa4bc70b3f2c3037e. 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/SE6XY2554539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728e64eacecaf7d64c989c5839abf1f467149a800a2b4c9a5921aa3c9c5caab8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE6XY2554529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99423e82386f63b7d96d54deb3ed5a95120b747ed7d8847a415f4c180583334c. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:09:56Z), 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/SE6XY2554552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3a190bb10041a726e1183452e5b53edaccb6c0a3edf3102d8865e5101bf372. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:04:36Z), 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/SE6XY2554560.
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