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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae1e2712679c952519da309599603c9ae1778d12419d25309f2f4ed4985f1c7. 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/113a8909-5ed4-4aa8-a637-642b16eed65c.json and https://artists.proofprofile.net/proofs/artist/113a8909-5ed4-4aa8-a637-642b16eed65c.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b56090c32d59b09112c0fe7ccc0c30d6bd3019cf02d16f8e3c4373df1268007. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/GBSMU9635056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7982ee0be0de1f78174e548fd1a87681b8e079f36d76288356d6bc126607bd54. 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/GBSMU9635057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b89a7dfe9eb23e5e8731ea80ceb5a849f2b90a20510ceb28dcc75044ee165b. 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/GBSMU9635058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce57b5e151b72719612573decf0d457158fdbff08550017f380e6aed799e42a. 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/GBSMU9635059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668d502ec01c7119d30f4105ba7c8b9bc6769f48ffb62dbd63318df85dbf4193. 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/GBSMU9635060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6fb85393d356ae0d48e0c76127192fc8618f552cbb400186ad5f0fd07ef39f6. 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/GBSMU9635061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7f3a2f2d374bf903df06abc88e04b2d2b90a4d2b95914883d1ca1ba4b14912. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBSMU9635062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1484147210117b6a08492957b0a1db44333d9f5d9e41ff89d5bea4f2f3b1e088. 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/GBSMU9635063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae2d261c08b71f0d855499be5e165b9ce4e0f692bc629c2101e7b3d57f484a6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/GBSMU9635064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a75fbe7789d98611822ebc5948f82e8fb542579599bd171c5a6da5af19a8c20. 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/GBSMU9635065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbc5e027d6826c9ff48cf9945a50bf822c546d53d2e26d9985693b314b899ab. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/GX38U2149669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41e4fd5d19efaa4fb12fcaad8919634c05f3df1fac5ad4f87ad594e76349b3d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX38U2149672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9339a966c5bc5a2996c20681be8922733aeb1570d99dcd4acecc5512f84db9d2. Chain 2 (Bitcoin): anchored in block 958660 (2026-07-19T04:21:53Z), 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/GX38U2149673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d734febe89fcca849bdf6aaf3e9b13154c9eea3d28a1aadcf24431bb5ea1908. 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/GX38U2149738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3afd259a24c39d066fe747cbcb3456dca8e6ca5ef67766392537e1e043d6ca. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/GX38U2149740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f8374b12168ceea49d5995ad732c3f658d8a3baa75cf9af43faa4ace7c7ad0. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GX38U2149741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3691469006d34d9925247bb423a52dd8c5f9fe041348e38d8c1085f1b201fd14. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/GX38U2149742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c87f8d4a1aac7b2229cbda5d5e80d059712d02a36b63a72ece287f91f9a29b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX38U2149743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56a33bdbff150bdee64c67bd2a57761623a7da1dac8037bae169a98274fee5d. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/GX38U2149744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e249cb51db3d3e5f3b0d148ce8ce0983a56f6f2ee5c7d826b9fd5d958b7856. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GX38U2149745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819e5270ca0f3fe329fc2d236e7efaf3fd45125cb62bd05d77c202bd996c357d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GX3HH2277746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f007092f274dcff9c7c135b5e39bcf5ac6989e839fc1ad442a7740404d450b. 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/AUGBT2329762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178ef0d1543b9fca2220d0540358fd746fde9cd3d28e1e5b0831296f57b09240. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/BGA472407807.