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 0x1fede0298834ce8630433119ba9863826a40bd247ab6f6c6892244b7f049bbb1. 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/678313b1-11e4-43ea-bf90-9039e8dc1852.json and https://artists.proofprofile.net/proofs/artist/678313b1-11e4-43ea-bf90-9039e8dc1852.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 0xbd769fc970b6b1b404374851def8401781ae0ff24ea18a0e1086dc32b5c5e532. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAIN2446061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99683e16b58fd5c2ca399fe11d3d9e8a061fec60bb9f052850ab34d34e583e7. 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/TCAIN2446069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd751f8815c8300726c020e24f8ba4c496c371ce65a5dd695ef8c02e5e40edd0. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAIN2446074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b19fa1570c618b4efb06ccbb56a7b63271a9faf94bc8cb0ee67724208ee943. 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/TCAIN2446078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ff6a6a9d73d50c010881bd98de6bf9a6e56e3c292d15f2f31e59601f3896cf. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAIM2446085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024e3b412b03b8dd78411573dabdc9887b02682e82e9eb941577d91778138bb0. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAIM2446092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb65ec91929f3f62a6c9a8f843023407b8f84fc4e4c2222a5a12deb112b9609. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIM2446094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1300cb2819d871bfe3aa409cf809cec01ee30936e01c3781dbf0e4351d346b6b. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/TCAIM2489674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4d29b4fb67db68057cef14eb456443cbac13f2fa34b361076327f2813d2eca. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/TCAIM2489702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10646bcb8232ea9991a4787dd5e40b0668580278dcd4f9a0a6d9e3e045866e51. 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/TCAIM2489712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a8dd81f8dba3c07700684ab60588253d5378eaa89873f4e6998baac0ed6eed. 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/TCAIN2489722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa903cacee7ef5fcaf648f8afd552bbf5cc029dc9721ba24b2f0c4e26b300fb42. 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/TCAIN2489740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb417b6d5b45506542b7deb955033b295f87c7d3644e1716bd18ea3e15cd9ae. 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/TCAIM2489745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fa86ea0c1002870f1da335259bc7a1be2d65f737c2aab0fdafae53cb24038f. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAIM2489752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5f2b50ed80e8833f81e12f4b9782518fe3e0ff27e2148809d29072b47123ae. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAJI2545531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087227f207b3d999887c389345d061febb1825c450dde38a05326fff8add4d71. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAJI2545385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8443c7c44d9e21b317bd081ac5b8c343bd0f403d759f4c395e162df63597d58c. 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/TCAJL2561897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165ef5456b82214464ef688ee817f2fd79d73a77bc803d7f33688ff5cc56b7d7. 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/TCAJL2561889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee838756603053223bb032523729a6d7e0105a3c469f496619c7541aaa14321c. 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/TCAJM2561803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f281d582add736028b94fcbaec669d5f6f205d54f2cd4cf1d24783b016b655. 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/TCAJL2561785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8e7c019d2fc848266e3c3e33a27a5f1654b359051d73cb64e1fe6af8d7c172. 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/TCAJL2561909.