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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 0x3509cf8f6bb5a1439b0069d13034eeb3550c3b987b7f0e986ded0747433a1c6d. 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/f55ceee4-1a56-4aba-96fd-ed161dcdb242.json and https://artists.proofprofile.net/proofs/artist/f55ceee4-1a56-4aba-96fd-ed161dcdb242.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 0xc8dab123308ed14c5c19f073c8afc1adc364841ef118a46a05ce0bbffd06b100. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:58:01Z), 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/ITPA41200097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75261da5c45c9759aa14fcefae3296c73c25c951c4d0868e208d99eb7f68766. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ITPA41200098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79525cb1b8c38656d3a879e1111695d01fcb9ef4d79f254eccdfd9a4e160fa1e. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:16:42Z), 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/ITPA41200099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b565259e959f727b4d42b9fe3e47a7fa3f34afd0d825f9703f831babfe3aa2b. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/ITPA41200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78dfdb5186c8a72bc3184b9db1db67dfed6b271305ae2d2c052953a6f4b6be3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ITPA41200108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccd163bf65bbed6af68a40e682dc294e081f3c148f61f59dad6a6054c170196. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZES81862385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8da19816e3e20337c187aa364a0750ca91d87e1ac793f1faf4b21d1c2cec37. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZHNB1980408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b469ee653bdd1a6feeead295e7771ae6895e4c6a22a88c4e36ecbd0964e3058. 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/ITUA11900401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2e5b624be842113d23ae0f405d6c8ed00455b220cfb02c2ffb290774069c5d. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITUEK2000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d082391222a5ae32f65c1ad7ab8f6d755bce52d3f296598df403e4f3c26ece. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:20:24Z), 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/ITNXV2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c198f59b54824a59916cb4638c3d84670bb0f51f9c87295fb9d725f30007869. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:26:31Z), 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/ITNXV2000039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6b889d1ecd4786924361ea1336500c661b28f6fc8b55d98de774e168372aaa. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ITNXV2000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cff4cc3d4a93d0c49f4a683ed7f251bb721b484a4715d98029b3f504ecb9fd. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/ITNXV2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf469101755fc3e399ef80a18fd631156617c4f80ecea64271c22ed47b773a6. 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/ITNXV2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da27f2860e4ed50af1e4ca736619472659d78c05300a4813e85263efe08bb4a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITPA41200067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5239731bf59398fcf88e2764eb70d5fc8e7c811121791c65e4229efd1450ec8b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNC2007924.