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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 0x409378827bb66cf1a84a701776df03591a2b91bf3c0a102a0a7b6a2e4367d819. 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/ad8c8d4d-ff6e-452b-9e0b-68238bdd1d00.json and https://artists.proofprofile.net/proofs/artist/ad8c8d4d-ff6e-452b-9e0b-68238bdd1d00.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 0x2899b34ae5cf491430ea91b1b442d2121026e448f4bc0442a9e93cca08c6ec20. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/GBLFP1836618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917e3a7f1b994cd7902d293debea0cb093bcedda903ec59072bed1ba4d802095. 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/USCGJ1938673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7e5a1d5ed18a40fef4c2da36d26a8cac5120a5fa01232869ac5a3c6760e4b0. 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/ES71G2016718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2339443e645e1f165f3f46b75a5e94e2ec1e5a6a577d41097f56a00753c4f1. 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/ES71G2016722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac16d2850f47a324ab586b1a6db16d71747f740fb95d06ecf48d71fee215c13. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:24:36Z), 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/ES71G2016723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300f06ecd4c30f9ec3af2d014126fd986b45935870018e2caa5ec71a5d767a98. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGJ2209146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5322d86ee2ca3a0b29b482a8edb8659710ce9c60ddabc9285f243dad399c6c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USCGJ2260514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71d9464b670aeff6b66c01072e24c5d88e9da5e6836a671b19b0241d4494b73. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/USHM22211786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3d98ff8a9ef7d414f6aed2e364c776d03b2db83caf1c7dad06f265003da30c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/IND382504342.