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 0x42977812ed5dc4d47b50e855330672c1147c5a6eaa3acd07b6bd656c057b1ded. 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/00b58e56-7f22-4239-a130-1a69230b1bb3.json and https://artists.proofprofile.net/proofs/artist/00b58e56-7f22-4239-a130-1a69230b1bb3.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 0xbbbdbb862dd851d3fa893c6d13a9dbabe921ae17c4d1fd0e092fc6a7a1ba1407. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USL4Q1839052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348f65f5eb971c20287f5e453498396ad254bf23fd02a6c5946cff31aaa24dba. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/USCGJ1914477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d5d9418466aa77ca7fd9c13c6b69cac5f1da8b98d52bfb88d13f9e3cff98ae. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/CAN112200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb462e33698534fe9d3406c0d82faf51702d0167b61ac8e62e16c3ca76157fca. 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/CAN112200860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927bd0fe2a2147854dfddc01f30d697b8fdedd4818cff175d0dca579a198034c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CAN112200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc71ae3b8a43c9c427db7ad5d1b3ed4d8854af8aec969baa43807ff60788d7d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAN112300759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed670700a149320e2a352011cd1a5dcb25f87bf96ba670d15c2be1c534595d1. 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/CAN112301054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad595ad10feaf4990aa856f982463341192119592bae99221fcc1eabada12e8. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/CAN112300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad595ad10feaf4990aa856f982463341192119592bae99221fcc1eabada12e8. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/CAN112300716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc71ae3b8a43c9c427db7ad5d1b3ed4d8854af8aec969baa43807ff60788d7d. 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/CAN112300759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed670700a149320e2a352011cd1a5dcb25f87bf96ba670d15c2be1c534595d1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/CAN112301054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461f5506e8bf8fe30c776ce3200f355573fe32fb558d200926df61dd61d1bba2. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CAN112301437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d5dd24a4ede93ebd8e627e11405abffe4367b75305beb8cab9ea8b5864f281. 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/CAN112301605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65909a88ad8d5e81f2a34b192ae2bd78c4fa330225794e3b7979f60d2c197665. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAN112301801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6218ec926fc2d30ea9e01c6e2c9c023f76f368ad3b3496976e41c916508bf9a0. 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/CAN112400560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d01b12e174a90223bb3059b4bdb04ce17a2a5d2e03d0b1f8ccd687e4c693c7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CAN112400468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f260acc1e83c6f705cdabe3fc3c9933a6d35208f91b57062c0e406fb9f083ac. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAN112400889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20445f07479c08a93782afade1344e917a4df26c34de94a07fe5dde74a51c65. 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/CAN112400561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b9c66f7ff7de390a4770d77a54ec6ee413411e884bd1aaa5283fb5abb2605. 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/CAN112401701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b54f355745fa0b38b50e0a5f061ef1a961eef2a7864eacb4cd7dba4fbf0c697. 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/CAN112401706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dabd8ba88d77891d240d96fec163d60b954c8e2003128497a63900bb2b826e. 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/CAN112402326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b9c66f7ff7de390a4770d77a54ec6ee413411e884bd1aaa5283fb5abb2605. 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/CAN112401701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b9c66f7ff7de390a4770d77a54ec6ee413411e884bd1aaa5283fb5abb2605. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAN112401701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b54f355745fa0b38b50e0a5f061ef1a961eef2a7864eacb4cd7dba4fbf0c697. 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/CAN112401706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4b8be3bd59788a81910f81f4492366b9f5536ed49b7c611ef48a80894f7a31. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/CAN112401707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4b9c66f7ff7de390a4770d77a54ec6ee413411e884bd1aaa5283fb5abb2605. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAN112401701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47778ef09b9f3abca438b13b4d66e242587f4a18d7eff3c639e8cb0036f48ccf. 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/CAN112401708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083f1f6477a986d7dec52f80467b160af4216cacebefd942c1d8e37df8a1eb9b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/CAN112401709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7e503acf7c47f41fa9031e84aa7a41115dcd2fea57bda83616aa589fc72f73. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/CAN112401710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a74013d7debd2f31d61f6d1e0142935bd84224d7ae404c08fc4f8c8fb51f17. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/CAN112401711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6201aefe300f986d66286e7e12ee980ae536bbd8dfc9e2266e5ac324a8aa32cc. 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/CAN112401712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7df5286e592cc9274f75e3fda9ace2d950ce02942445481180c2094cc3f3e48. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FRX282525989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44e43031804747aeea4144118365717e1087ed10f4a68eb6db735dd90932479. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX282525990.