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 0xc0ec97a199a4dcd198e38098c3407ec708dc4db83e685da9930849a43d7efa25. 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/161a067d-fc34-4f63-817d-f66f58623573.json and https://artists.proofprofile.net/proofs/artist/161a067d-fc34-4f63-817d-f66f58623573.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 0x045e1d9075da5bb98885a4336dd7e6c7c266e38322bd322df168fa601352e462. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBRKQ2168597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459b55c8b39773ec4552413824e4e06cc123ee40d4d883c041c5f5786626e817. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:57:54Z), 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/GBRKQ2225910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad91db76c727d96adaf15cf83d56aacf82162eff92e0520e9edc15acf3587ea9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWDD2208725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c35c90115ae7b90884a70a9f1ae1bc718a427b7e08cd60df5b7870a1ae7225. 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/QZWDD2208729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6929226c5eeea4a29d6e8ab42ad065763374d1f6a51edd7484952eefee7f23. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWDD2208731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdf41796a6f99fe5a74f70c17ca13d9c2902466c3782ca54db50a4122440df0. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZ5FN2438514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3b0a007195de77da51f6be5a5e1152449ea6fe22debb6e844c5fdd4126945a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTV32416712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d29e3c410c03c56e5fa61062cc0c95c38128bf126b7c68b50a17b3baf58499b. 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/QZWDE2434430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926b59ed1c502474ff3fc32f92a5a6cab1d7413d929ae8b110af01a6b9fec500. 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/QZWDE2436015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1e3bcd0828d682cf6c94fa375fe6a2025c991086f8af5e400581c0325c2506. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZZ8B2498453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a349d4b9c5778d735e5b05a8f9b00168e06205c1ff1fe5ae5a95a90522da9a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWV32483325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253291020e7cd43e55ac9421db3fcaa078b80ccfecb7f403d09199cb2b31e6cf. 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/QZ5FN2594004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc856f5decbd4a26f134776dc062c62e01ea3b771239a670fae510804d52548a7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5FN2311245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821ce23ee54334eb98905dcade2ed9e96ee8e6ab53c1dffcd96c7c6ee2992eab. 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/QZ5FN2311249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237e05c5d5ddc05f2b2227a0e0a3245ebbc869d814fe939e3f76d651cad82c99. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR10S2401794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77db646409e14c6dd20cf39253097f5e412845267f05a6172bf047682836526. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DGA072251196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c3c9b19e4f5e723d547993aee904f53ffe7e2f39387d9c3712f4fa29c51c8a. 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/QZTRX2226228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62aeb7f771f4c93f085197b0830deb2cd5b8176c35d0a6bab4a24d9a62f1e324. 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/GBWUL2134830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dbd81058a67984dbd72660a138bab199f307a7fdd872238f737805a086e8fa. 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/QZTV32320421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54af14411007d35020ca204401af5d3e3bd0e9cc532cb5811a876c7594a4801. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZWDD2258969.