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 0x655a2e73f8bf6fae97213bde66add676a3d263dd9ee1e6d7bcea762c7f976046. 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/de13a306-5884-4a5e-8843-b0d99753f6b2.json and https://artists.proofprofile.net/proofs/artist/de13a306-5884-4a5e-8843-b0d99753f6b2.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 0x7291a08c8d3c34866f57833766855544ac67eb04283bfd0f16b6d3952e411503. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/SEYOK2003219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b16269450ee44ce7cfa431d0c1e309bd29808d1f4ea385513b9798fec418a74. 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/SE5BU2067346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c17c8c557b76dee8c61ee5cd274c555719573bfd641e09a63214560b7689f12. 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/SE5BU2067347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e280d6ab0dfeaea777371d4416bd2b9bdd0969e78923977209291ce58e6d0d. 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/SE5BU2067349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3136a855dae9e2214d5c4b9d6afeab8b9716db26037b4ba908bbb0c38d662b41. 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/SEYOK2161937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4dae2eb9e38f22985012721530c7eb04f99a091d90010b8a941c527368e305. 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/SEYOK2220007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e179922a76ac438c252205e4ce84c84979dbcfb8425d8b5a74602a0224631d2. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/SEYOK2235343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712d0da1800fb043e4fed0c9aafaef0d97c408b9fb03d192ee10c1e1b4327358. 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/SEYOK2308753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d358e264a8b1119de120b2970390baf8e001a9de4461128f6406263966443c. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/CAN112302015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea30f1cead313725a5b504785951d87c47ccdf81e2eb07a729945e7273959207. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/CAN112400529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5b95246cc1753e541f11dbc47f55544cba7514cc25f7b7e9645ac589cac0a7. 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/CAN112400931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080582d3ac780af835a471d5847aec4cfff878edbee3e598e3f07f4591fa859e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAN112401197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf18a048a73509b475e813458ad30c344dadadd9d0f7c985d26b15dfa5f478ea. 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/CAN112400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5b95246cc1753e541f11dbc47f55544cba7514cc25f7b7e9645ac589cac0a7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAN112400931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d358e264a8b1119de120b2970390baf8e001a9de4461128f6406263966443c. 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/CAN112302015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea30f1cead313725a5b504785951d87c47ccdf81e2eb07a729945e7273959207. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/CAN112400529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080582d3ac780af835a471d5847aec4cfff878edbee3e598e3f07f4591fa859e. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T16:28:12Z), 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/CAN112401197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f8c3045cf086a3b5ee2ecbcaf80479ff1043b8105eaac766a69c67b16de9f0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/CAN112302208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe0ee2a9242db0a0244fe9f1926602086de1d37ce1ae30d73f4bd4fae33ae8b. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/CAN112500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f35addec97be78f866b9f293fe2ba95a534bd0bf49a343c944f70c4e1fe71a7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/CAN112500117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8807a22ab494cd8f7cff97042782151c1bf283cc701684d39b5c55d010da775. 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/CAN112500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8807a22ab494cd8f7cff97042782151c1bf283cc701684d39b5c55d010da775. 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/CAN112500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe0ee2a9242db0a0244fe9f1926602086de1d37ce1ae30d73f4bd4fae33ae8b. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/CAN112500123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f35addec97be78f866b9f293fe2ba95a534bd0bf49a343c944f70c4e1fe71a7. 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/CAN112500117.