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 0xcb9850e8e15e52ff047e8b54fb7a25194e8c98557b26f52e98b1033559488c59. 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/a28c7dc8-00fc-4bb9-9dae-0acd166e286d.json and https://artists.proofprofile.net/proofs/artist/a28c7dc8-00fc-4bb9-9dae-0acd166e286d.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 0xe3216d45e10be3ed4febd8ba0247a4b8c8e27b87c658fce1d973304c410c2059. 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/GBUM72307879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d7b243124687cd891b4384d40fbb34254d69da7492e885cc6a36985f51b69b. 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/GBAHS2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ac30263153dfc3652b291e338aac97013ddbce1b9bcd17e2adf7c58fa2d592. 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/GB8KE1956182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f452aaa54a09229722cc323f5641ac0f370e6f9b36a015c91b44a6185022e51. 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/GB8KE1956183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e982b2ecdf86662dbb7c09c9e3c66ae6d741f0326abf375d63372af192282a9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB8KE1956184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5db369a6f64fa2866a3838eb16aee6eb33daf8ece9d7efb2ea9643f8e3db8d. 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/GB8KE1956185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d92496f8f27d67b6bb0caa8c7a7baece2aae351d39ad0a38f0b43f53caabf3. 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/GB8KE1956186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95377beba0fea55c9d4deed4ac504324a340fcd114b081e4741b4406e8da6846. 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/GB8KE1956188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c35d55408719a154fd30e0e4da289ba90af1547add23e7e4cd50da7788cd3ea. 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/GB8KE1956189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e039527ab11602cd0d71ba9b8355677555b1acb959934c4de05db4692b2138. 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/GB8KE1956190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392621e6f4de68dc8673c4f5e79e14373d62873252555b98a786e10fe67e9498. 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/GB8KE1956191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb74f1eb2eaf63dfa53a869cb96d9f2027dbed9deafd3b7cd60129bbcb99de56d. 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/GB8KE1956192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951c50b025f27de49ec9c21a908ff16ca26fa94315643b5f429438392e9507b7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB8KE1956194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6460a6b78e6199c4b785a790570a49205a6eed40bb42b179db35fd27a3baae4. 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/GB8KE1759124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed128d730e156c2f9ebf408f3b68af229c68890733d1ea58f053d26edf3e6436. 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/GB8KE1759125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bd02e679cdbe96e5c83b6bd689edac3d5e82498e960aeca087d8ee8adfb25a. 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/GB8KE1759130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b79f636fb2b006140d0ac11e6bb13729dc93b1b1cc5a3a7369dac7b83e5d37. 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/GB8KE1759131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967425c04c69b69f7ce82ab17d78d9fb70d61a71287105dd2395890e70017b37. 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/GB8KE1759135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c2e0a609922aa0309d12532584e4fe471b2d6573dda375f506fd99057cdbe7. 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/NLZ542400411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330f044c2829e058f064036dcb5435d09046ad81da54e7fff32d786020ca074e. 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/US39N2306398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd0cba62d1fdc7483b3b507a5797af8ae19622d442334798d6b2cbb4c08d964. 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/GBUM72305585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e365f661cecd18d8c8d1bb48e80097770f01065e56e1fa77ab26e56921b93ad. 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/US39N2302643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37dbed6d75b712c6b5a3afe38d36f6810f78dcd412b191d1c55002c54f63ddb. 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/GB8KE2201788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2ec4600deadf49778dcd2de77eac8d8f9cb248e46a8ff5817c97698ddf6641. 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/GB8KE2164235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df0730b66c7f1b86c85722ede029a21ae8dcc61fe3a90387a504802478f4a6d. 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/GB8KE2157335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97e0a6429b53e0603c37339804c3b622b5b67a08fcaeab305c97d8ed71cd59f. 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/GB8KE2055700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74ee52184fb61717779fc4a6a88c415ef89e150d6445738d18ea0c43714536a. 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/GB8KE2050933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8596cde8a45be0edcd678be7d0ef8a120ded38f24d4c85e477c30f3e7579b1f3. 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/UKSVW2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdf9bf3ec90831c58b8752a66b5e93fb63d903a3c3a70c47b1cd408f84cb34c. 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/GB8KE1855029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58270601b8d1316cc284e68d60989dbb53b125f98309dedb72c18ee009eca0ac. 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/GB8KE1653243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615255314f4bfcc0f6d8f6fcf79c032d2ca0c171184a1da83473548f8085febd. 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/GB8KE1653244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a818e5d72a6d479f803435606548d804f6ed0a42fa89a950ddca652ba975e84. 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/GB8KE1550005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3216d45e10be3ed4febd8ba0247a4b8c8e27b87c658fce1d973304c410c2059. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBUM72307879.