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 0xd05985157f487b10c9bd40d89b98073b2c72cd65dfbb6fb678d235d3fabac20b. 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/ebcef8d8-e5fb-437e-bd8f-7f6e0bf5db3c.json and https://artists.proofprofile.net/proofs/artist/ebcef8d8-e5fb-437e-bd8f-7f6e0bf5db3c.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 0x72dc95381556269c67d20ff8d2358aee3a07439ef97e0b6cf7e65b6e013f47b2. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USDY41575189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dda2fea634e9336a46227ab9a097bef4704b47bd0f9abcd378c96e2a620d5cf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USDY41643828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d485c7d78eb93b5cb0a9f3e7cbeff42746efc574b650df80eb2bbebe2eaf2c4. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/USDY41643829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503b1ac9b7c0268e9d69ee8a418b16cc407675f67b91f180d25fa7ec75ac2d50. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USDY41643849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32a262336ebf51abac89931bb60fa644d3a8a4144e61653c8c66a19b453d5cc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM81699776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0e455c830030b451dc648e28de26a783d94ca352667dbad390a840d45a5fc9. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/USHM81699777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec70329ca6a657d5f5e04c95e210d4e175d70e19ca89cdc46b2cc70924d6c862. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USHM81699778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0085eab1668568de13d228a0a5c40b8af35af262486f5d49fa8d7e97f4168fac. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:19:35Z), 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/USHM81699779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4004163c1219542f74414a00fcfce8ed605eb9a59c5562db2d5c4125ca5996f8. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/USHM81699780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945f7e176180d1da1afea7e3796493061883e36155a22d9935954b1a5c74b6de. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USL4Q1990597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2218941c7d6899db502a56c7b424d8e2d51f468d4274b94a99b71772536141ab. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:21:28Z), 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/USL4Q1990599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7405befd21bc1a6f5d26b546cb4808688a30fd577e2ca1b96ba9879422e7925. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USL4Q1990600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b680a423d57e7b261d39580cfb49875be7709c8f4aa38fe2ba91caa0325d1b. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/USL4Q1990602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae584385e2a6733fbb1e0509b8b736959b1be001a05d324bf265655d3815f224. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGJ2482499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf815d83df627dbf8596c54b27fe19db4de282b2320114fa280a43bb1fb9198. 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/USCGJ2535103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0a9deaa9a317c480a810ac73893c779db92d91c4dd31a3a4e4ee18b41b84ce. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USCGJ2535108.