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 0xd2b264409088ccacda65ce2d9d25542602e4841c9fc6ebdff910a86f8cef01c5. 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/cac104a1-bf8d-4811-b819-bb24e043e2d0.json and https://artists.proofprofile.net/proofs/artist/cac104a1-bf8d-4811-b819-bb24e043e2d0.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 0x6e1195dbdf1d05e16fcc9a113cfa3ed6d0e3164fa00d01908d358b32336e7e0f. 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/SE6SA2178741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac3e847ee9c6e103d67e31bcea7dd7d24d31f216ae1b1c2242fa49fadc1ecb24. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/COAF42392672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477ae3f583f7e42e62082e76fc4829f5ef7550e73f368cf5dd9b92f11b8efb5a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/COAF42490437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba673bb58ccbcbb65e8fbfa84501fdc3b803df22b7a27b99ee0c9b91c00398a. 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/COAF42492433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf60b10e521e055a21d98929fa239a07ec35a708ddda9dd89717eee5492e87d3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/COAF42495249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ca0186a95407d32b2f5767fc3106195c876f20610514dfcc1b39146bf7d0b4. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:22Z), 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/COAF42495344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde974032eeb0d76f46f945f71763daeac127892340b0b9bc37b7dc2eaa1f5751. 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/COAF42495233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf20b58a0696cc005d41f511e59efb79cba5d67b382add007ed6f3e7bd19aab. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:02:17Z), 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/COAF42495268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5c085c758d2cf23dc5b420cfd3b61fde74e8756ec98a3a6becce09073e6a67. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/COAF42497656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8c35ddbcf37c8896030b93cc36e2a76c8f14767c6a6d734ae9dd0f08369601. 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/COAF42500423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f271c5c97e1cac5c625ca432621d659ab2f7c6d68e695b6f0d9530c4fd01908. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZDQH2537468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47e0b09dc5e3c51ce37e0c924a6f82278ffafb6af9dc6282ec7266b64277d6c. 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/QZZ3N2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04d5ba69005832321afbc7df9f63034209520eb43954d25a1890b7c38d54aa7. 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/QZHN42420052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea228bfa4b507fced90674bb99d13d132af450e69b976ebc1185f98af13c82cb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/MXA2M2300243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a8a0ebc15f1c886e4fc39fa1cacb95e306ecca0b8d8cfaccee2b76e9fb1043. 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/QM6P42535175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf526cc355f7e3486c7d5f3049205269f7430edfad26cbf14db0d3c558b30820. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/COAF42392183.
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 0xd0ce30ad024f668d4c0942b08e2feacccc01b33dfc909039b0e71a1e9e9a00c6. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZWV32453984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb8f8ab75d35ff13fec8f532a9715b556f964433438ab4cd90d758fa97d374e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZN882406495.