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 0x75434d7e7782626b6dedbbecb9b89c87eb26321a28b696eb58c0cbc3cb23bfb9. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7be2a7f0-cd90-43b0-8df7-3a282f9254ed.json and https://artists.proofprofile.net/proofs/artist/7be2a7f0-cd90-43b0-8df7-3a282f9254ed.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 0x1d0594a9c0153ff15cfd9be87e22f20c069af53ed274ff141d46baebaa6a66d6. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/SGW502351295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d84b6ead452a2cfc721dcbc9c8ca031ed09615047b967c94bc121b52a37db2. 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/SGW502352739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12174f8dec1ccf153c04ca89d9e631a810a396d660f734e624c7d3945d2f47fa. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/SGW502352668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0a9348b8ddf02cfaa41ca5ce63bdd5559fd6be34758ed4e7ba80cc835a7180. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/SGW502353063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x801a1cef184adb06973b4d91383a40dfa9a2fe0b6082b60209718df9095537dc. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/SGW502356312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fdf1f915ab890aff3f94dff2709bb5ee290f2477a193f12289eb3d065b04340. 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/SGW502354600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5d760c43e7467cf75f268041065e95fd8428998e10abfc0303903f53ec72d1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SGW502353602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb7ff6d104f56b5ce9c2d3817d828ec30a517ba9268ac1c6cc6c9f365d0ae3e. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/SGW502353209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ad80a58f0cc5f1d41fa0265c69e8d32289c3be973ce26cd703851245775fed. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/SGW502354640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ccfef16c7e2aa9f3121c9f3ba43597fc730555828a8aac46f16a0b213d408c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/SGW502363139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846b6d3e2399bd5927b8089591d151cbaf421dc98c57b436ff11ee117ea39349. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/GXBAV2407651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c3366c90f1f561cc85f4f3804aa61c188dc5dba84a93a1c6f28b61798ebe6f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GXBAV2486846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83962f4c427bcb5b6ffbe6fb04eead10d122921d0f5818ff560166167747fd4d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GXBAV2490264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687786fc4e6222d8e43ef84e22289f54ca30c9b161159d5cf57620a4843bc506. 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/SGB502586226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f3f0d236924d29d7d8dbe3ef47607c1c77cf7343130a8797022dc193601b6a. 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/SGB502544872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287bd6ec0188542d5a1fc3e96ec1578879bc356ae2763b6544dd0bea455bd2fb. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SGB502526205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654c4d925df8687d01243c7f6bfcf01219c66051a8dd7847cb165b6366d6569d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/SGB502590215.