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 0x53318a6bdb57b393357a4cf90a1b2b34e6c7bc2c253b1b5ddb630af544c9a662. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfe58cf6-a2f1-4a4a-ac9e-730a68812363.json and https://artists.proofprofile.net/proofs/artist/cfe58cf6-a2f1-4a4a-ac9e-730a68812363.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 0xa3691efcd327eabcb460ebfa6d34d5a5ac13f7605715782da5ce2c8fbbd5dfda. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/GBLFP2318916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e86a27218897a5310c72bb69107ceed5d8e48df4c9b47d1763564d65ec07c0. 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/GBLFP2318917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cd9b01aa23ec993bf288ebfa79faceb8ce1f6db651aee21b97022bfda6d1cd. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/GBLFP2318918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f77fd9e867bec381ffd7d011f13500f37f1b56866c65b9c4f85b173e740e3ad. 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/GBLFP2318919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5748b290e67c7c3945dd38bfb0063139b39c18034e4e02614a42ce67e583730. 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/GBLFP2318920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059c1522639903ec9771f3cd2deceb4f5fb2edd68453b4dfe17f3be52316caf0. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GBLFP2318921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08b00b05cd42d33309b963e85ed91299d5522e06a1f9a050746f50072dd8912. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/GBLFP2318922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72714f0c4b8c9ff617c804bdd76c31d119f674446aa4cb5b5694d59a985dce74. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/GBLFP2318923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29147f34cba1155ae19db5f41ac1213ebfe295f0d1ecf890ad4a5af7e843810a. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/GBLFP2318924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d325aa37991b395d321f52b07f3f26533021a6c5af84cb4022c3be4e56f45b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2318925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c4f39eed75ed9c9e3cd20575a0edcf99f60eac56c75903959b31eb8a6b53d7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2318948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924930e6ee9ac3db29f69d0f4cada21ede803bdbf8eb87fd288308a57670f8ea. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBLFP2318949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6690ae3bf5966a8b63e91441cecb084fd2fea55475b50bf80663c1a51a9a50c. 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/GBLFP2318950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43741ad6934d58d4858f6e58f80ea24668e31c1ce0ddda465607d504a7185975. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GBLFP2318951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1665dc4dd98cf776e0493b1ca2cb2fc876d0c4bf8a2df06896fbc30f3dd7c5. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBLFP2318952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e450c5cdb14355a6ca37d4acb537e5a12bdcb809d6ecc0b75f4a9769a3c8e3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GBLFP2318953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7f55291ce145a792fdc9e415da251d9fe3366d70db5fc2043d0a42ad7b4645. 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/GBLFP2318954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c3b303c848813874180ad63211926f1c03458a25705e2e54b4c5518648447e. 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/GBLFP2318955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5c9be9edf981c8e41090edf9bfb30481df1821766d495b2e43054916d0ba69. 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/GBLFP2318956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296c410d59599604699f7147b453c641f736b8858626f5e0f09339b20db97920. 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/GBLFP2318957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6c9659669156ef0d1e496563b7ebcbf0b5a4438c1bacce7742363ce4f41956. 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/GBLFP2318929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0e0d502d05d2af2a03c50ce89c0d8c9305ec511eafbb11a06e806db3c09190. 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/GBLFP2318930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3dbf238410b96952bf2b82c512880c1f54c2f3e1bc8df7f2a96e0bcb03ae04. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBLFP2318931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270cb825c1ea54ce5b1b0589b6dd4ba4e0d5fde106de0040a212c428e79f4a3a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GBLFP2318932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b386c254a90e6c590b6a7dac5355c3c0b33593e8f13bced726a2cd19b337798. 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/GBLFP2318933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c8b8207430ec4ecc465613b7ad39c9b7fb6dfc71cb145b6bdca05900437c1a. 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/GBLFP2318934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7862c45a7e72c0df8f60e776c28261c16f825dc5ff570a75a6569336737f510b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GBLFP2318935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99f39bb34ba50ad39f780e4c807d350ab5da1fdf67c247167bf53d5e5837b5b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/GBLFP2318936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cda8ef770b335c2ce9152a04c84efce690d7942128a7ad0bdf3661bf65c11f. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GBLFP2318937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4acd40aac36ddcbd2a918c812df67bf116457634c36f002463757bb6ec6d5e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBLFP2318938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dab3d9e43e39fe17f1611671c8b1d398af48aa7ed240c15f0a8fa1e9e23c09. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/GBLFP2318902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079c383e296955f3431a27532e42869de680ece03028c7e800918a12a3c0df22. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GBLFP2318903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037125050c43ddd7801a22a7a2fecdef600365dddbe74f267c98cfa85a7a60ae. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GBLFP2318904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9accde291422cda0435920c3c9256af5d67a250d469b2a78a5a7efb8cfa87447. 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/GBLFP2318905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa479c669ca3c95d27e4e91da3d4bdd6715360db12ee21d205322ed99c12d062d. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/GBLFP2318906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80b5e1e32419c10eb5bee1bf76dcc5d85c71ed5e7481ed5cffc18c02286475e. 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/GBLFP2318907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996f86876dce6dbd78f1868c3c3d067fef5855ed04d53d9ac8897fa73a9820e4. 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/GBLFP2318908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fefcd76ad8644d061d7c607e082dfa7a5ca488836a547481d29ce4d83d0537c. 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/GBLFP2318909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade224c852bce8eeceee92ee1bf873fc4e3211ff3a139490cddcaf2129c1c90a. 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/GBLFP2318910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074c05ef65f855050d70d26d939f18117bab359b9cdc072e88dc79feeb82b122. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GBLFP2318911.