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 0x78102ce42ff52ac1cbab8d0a67c6ce879d59bd995be03d6c1daad4f2d9d570d1. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/352a11cd-99a3-4afd-8263-8d275b1d2d36.json and https://artists.proofprofile.net/proofs/artist/352a11cd-99a3-4afd-8263-8d275b1d2d36.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 0x80cbc7a28493bb0c02407e252ff8cc5d5d6f36e1786bc7c9a8269390f2caab83. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SE6SA2275027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536941358228d4b85870f04a5ad062fe433bc9ca46fc535a627c8a1a47b28ff1. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/SE6SA2275031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde489f21b6badc16d9a80e9f0607cb955e2c8eb64d47e7a730fd682bee7c7907. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE6SA2275032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c77a2b854be939d10b2e22c6b93e77ee814332eaf56495d83577be0843bc62. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:25Z), 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/SE6SA2274983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136bf8afc7b2b6cccaf54c47fe1138aedf8452e7a60f3f810bbd7191ccd4d38d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/SE6SA2274984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996ebfde7f7854ba481a5490a51f4e1150b5883c03a863a6447f59ef6da20955. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/PECR22301317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f7186b119010cdbb55963324320f9d04511ba604f9fc69db1fb260662480f5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/PECR22301358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed2cffc887806bae077fd8ebf6af55145e02702338d45c51333dc06a78c2b87. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/PECR22301370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a244bd22e606b3efe312d5e83e8c3739cd4e4247a1c8ad7672b3a48f760720. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:49:00Z), 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/PECR22301373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817b20c09704af06b4e4528f4ade3eef7436ac8c90f2701791305def5c387605. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:58:07Z), 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/PECR22401319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08d3882a12d7cd9ed3094782fcaaab443c5b39def70753d1e1f21e792c4bd76. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PECR22401560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb772a4ec90e2e1468690cc0d1c46f9e770c613d2165f2afca0cc7e27d2b679e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PECR22401561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56666454f5fae1d1bfd41a765e61ee7a391228cc8bc4a1de6fa604d52639b550. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/PECR22401584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246c2af9b1bba3ab0e9ce5df3f79401c50fa4ffdbaba54687fb3caa6287fb88e. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/PECR22401588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83628d5e58e9ab7035aea9629a5e08afef194137c86e784910a097ba84a24ef. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PECR22401591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c0275a2f0a2e91c9a4c23203642537dfcbf8e4b63b6b0f997f46bad5117dd2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PECR22401592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da55b683c8affd71f5b8768758155b244959f92d47adeb496baee11278e8fd1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PECR22401594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bc17c7f96c44d211626ba10f2fecf5381694d773ab880a853a2d65f0ed8491. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/PECR22402319.