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 0x649811ebc8c336915ef978e6f5ebb0fb135cad293e6177bb4683d557d675dcc5. 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/5dd927da-2873-46e7-896c-20dae0f4e9bc.json and https://artists.proofprofile.net/proofs/artist/5dd927da-2873-46e7-896c-20dae0f4e9bc.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 0x824fce45a6b262749c2a46a7ad8a340e0a1e84d56aad184e96487bb945463dfe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA51935326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc75d86d5a7092540b7506b5dfef2287756af4515499540f152863bc06ca792f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX3Q92165237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe342fc71162498395051f994337da3c57f5a4901384587640e6214b68a162f0. 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/DGA052077231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a349a4d9e1d695851c5f7fabfcb1ab417a92e9a7bf76a3b6a7d5fe63a723362. 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/GBMA21961647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3c6ae252536f4f7f0c7e428d17f3b243305b05e9ef7321440dec72c28eadb9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZWDE2313172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55527f41f00a9f2d55341c6d90dab1a89539f931066b295f30800608b242d0a4. 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/GBLFP2340004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70caeaf824c6a621730e76ecfa55ecf8b5be19e43db3a87bc6a689007c5b59a9. 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/FRX452359564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f52c6b626b4ba7502e99d6e31fa27b444fc593b98cd20bb56d308a8a638753. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX282329539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cbad579ae63bb7985e1d315859c51ae01327c791bb07152ac10297392db871. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNJZ2267862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f22ea9676c2a6c4532e204f0a616eba05f3786ffc14c83101beef8b8a21a2dc. 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/FRX762219593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55748fdb57460feffaa84802775768f35de54a7548cb4d07c4bc7d83af2d3b9. 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/FRX282295042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b2d02dfd795f9811e99479134f3bda35385a73cca9c8b988d60dda078a7560. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX282126660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f09ed2dcb49532d326cf97dc59bc2371ca1d08e0e7cfae091af6da9cbf3a46. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX762093696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fef9e08236800c1dd62a7cd28c6b7238c2c6183d962d5ba450c792cf72b601. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USDY42035095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe11a5743fe637c1729a2bb0c5a0359905681c2b8b4a201b32c65dcbe773116. 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/USCGJ2030801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb734d56fbf0b44801b7ff61e928f0cf6553e1685456412a475f2918cdf54532. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MX1951900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57656c7ee6480ff2d86450ddc4e07e7408a822a9b34613792f3be2b06fa8132a. 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/QZHN31933731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9879b41f0e7f1229bdae9e00fca36684b7144f157b93e0eecb1c146939d03b. 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/GBLFP1911524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db9ebb71f9a9297978596c2a1efe6c3207be44f6033db746c8bfd2cafb2809c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ4JJ1994924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7092995e9a93988b8b893ecb060c9c9fae682020cba75625fecd11080249ecd6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA61863874.