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 0xba1f2cefe8904e053dd3d45f53c881ef1e60d76cc6cef7191c35697f787ba566. 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/e3387230-e1e9-493e-b566-d5ebcac61976.json and https://artists.proofprofile.net/proofs/artist/e3387230-e1e9-493e-b566-d5ebcac61976.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 0xc2ac6c4a3b91f460e69d441f1ee0659cd3441046c00c8344c550a49e3f70fd83. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USZUP1011334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133e503a3fc21f6136616049c4210d8d93caa228592e575776e61d20f3c48c1d. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/USZUP1011335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5c768932348d1fde9b482c745fdcde7cc430fda8424b24540cda80e67a9021. 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/USZUP1011336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007e1ad1a3276275993ea0b0b04ef719766b022d720be7794e004856cebe0ddc. 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/USZUP1011338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0adade203b9c31ee4a45d266c072601ccafcdebc69485edb6dee7609b864b22. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USZUP1011343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3deb1e2928582d748e96f466b44ce7286f0a28fcd6da957da6ac2af6e3f985. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BK4DA2500153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77165046659858bd24549ee0ffa39d462db5415bb2691dde36a040d8a3be911b. 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/BK4DA2500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb410ac4ee0771ddca0974016808c2b5847064caec979d9b9bb8cbd196bb531. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BK4DA2464832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059bf02277d011576dc8db2cbd234d737c7bbf54236a145fd2a2ff6451e729db. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/BK4DA2464833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45817da2919c93761fa379da7a1b7c42f31eb802ed590c56b4d22bc0b4c8cc9. 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/BK4DA2464838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac628165b17299dcd332084e6b2295f0f782952d7e526b50d03aba28cfa8bc4. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/BK4DA2464842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2849126b1af7a1d7b398fd6844503dd43bb0b046e560428b14ad09b72d0c673. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/BK4DA2464849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf8d495dbd0c82e707cce58b609db97f110cd2c707373d778af6653e2a6bbb0. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/BK4DA2464851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb10bbe6a5d5d01a6bc6746e3c7cc118d933aaeeb91a2eb9777ded1abfee2b29. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/BK4DA2464853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c14cbfe3b0bc8d1a4b7fc54a7df8d477e20b294d8f5f5f96dff3fe7d313717. 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/BK4DA2464858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e226879d676650164b6bfdd1a99954d83f90a8fc4e4b7f0a76ecc75af65d6f. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/BK4DA2464859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd648bc59c908846a31f57d5e47a1bba960950e1f84edd8edcc24fb608ec1dd3. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/BK4DA2464861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93dd787a63d7f5b6afcd9d8ce4e67a57cfbd5738d752910a8d2f9cc4e423e19c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BK4DA2464864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2553c40870e7bc58477f12d2f5108bff51ae672988de8ab90d6b821cfb4b7e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNJY2000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9116e299d82d0c8efa76c61b2b8c6f412de1878611df0d6f4f949936cf88121c. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZNJY2000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd1b660180cd5427b3d2ac38199c2232ade6dc5b06c06c8cfaecd5d6636ddbe. 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/QZNJY2000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafa9b4ffd6ee6357afa547d209193dcef02279d1fa2e643d9233ea2dba4076a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZNJY2000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cde00b501235b1273aaa6fef3ce9aa005a84d678f65aa38acbc30f3af4f59f. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZNJY2000095.