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 0xe0ce7d14426e9e9620ab2864500b5a1e74ea9725094c529d3a34c3a6fb68b880. 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/ea920739-225c-47e6-b94a-d7f458868630.json and https://artists.proofprofile.net/proofs/artist/ea920739-225c-47e6-b94a-d7f458868630.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 0x958975d7190c2bb72c19b547419dff547152795c9ce6c49165f810beeabaac97. 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/QZNJV2156386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9ac1af49c12ae9ff040309c674f665e4a6b9ff60af0b9831392b032356e63b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZNJV2161569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e8c5de575a665741828d3593c399e3b52232a3326424b5a75dd8f55c01c09e. 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/QZTPX2188308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d93a23a0191dc0bd40d47f60639e98aca638f9a5fa66a78af460d6001a8622. 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/QZ5AB2287055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb444c08fc128b50213a886e80667123fe993baa7f031ffe61c0c35ce2d0ca5a1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHZ62247395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dcdfb13aa20369bf434522a59d9c831161fc1d5780e6984e4fedc063f4e461. 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/QZNJZ2221217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1b6d4b99b2e56a041efebe57069e5e1e6569e90d6cd2d386c02832a6d8aa7a. 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/QZW9M2272714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x114a11d0c44099ff382eaf521e94166c73fa7b183bc9385380c0f48b93c39bd0. 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/US7VG2359617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b3acdfe0898b7402cc17dafa28dc1dc9450c5c7f0568eef43462d89aea7b00. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZNJV2319098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d28488fdd93b50996c1411749c1088b97dd96047bb4bf90cda3a9eeba6516fb. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZNJW2345851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf377b17323c5c349576234ce6cb4d58034e21f8bc5989880f9c7c24518bf4164. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZNJZ2316448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed870520708ba67877dcb26510dd302f089e153fa1dc90433c16e3526e0439b1. 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/QZNJZ2316450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc052483ca0faf09c0128e16187b385470992054ccca7df7d65260f3e607bc5. 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/QZNJZ2316453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a77d9e168ffc6ac6fcf654322d7386bf2302ed2b6addbcdeff79b8757212103. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/QZNJV2467884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6172885b0f4e14c55b3e0b778190d3acce3766a2718869c484ba3b933d7105. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNJV2467885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c5296482c1c0a6e62317bae4f508ca46a9689ec056935437bfde32778246473. 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/QZNJV2467886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1824e94086da30caec3fe9ef9410381fa499164f73e50bdae5b7af22ea1d15. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZNJV2467887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f7c0eeaf74209168c55743cbe2a4f005d06caae81ea22caaa1450524e6f0e2. 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/QZNJV2467889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e97b3c36e3a5e91b2795cf47bad70058c838442b66cdbb52d1d49cbf87ef2d. 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/QZNJZ2460156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df901d8e5f980801889ffb39e4776357c47c11f4401e32ce2615c8d7b2b384e. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNJZ2460163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164f519e5bbe5ede9d4665348ae6ae3c22dd6d1a5899513d1a7652990260722e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNJZ2460157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fab7dc1587cec3a92190aac2590cd925505c453c989d270897550ade3be190. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNJZ2460161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb0d2693128b0ab399ccade22ec175da3d501e89b478978587decb69048b0b6. 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/QZNJZ2460162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9018f1754549671ac6cef01469bb65eb002edca53a7d0fedc27c275645a47fb. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNJZ2460165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5097d44ecd6019ed212786e1d561b6d0e9f9536905b6850c9f33af9874a20f4. 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/QZNJZ2460155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca08192f11b8b830331e7f48aa369ef1354e4c40f4ec6aa4a08a0f3465fce18. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZNJZ2460164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490593b173b7022e72d11bfbb84d16289c566014cd1db771cb9f5486fd1d8d91. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNJW2597419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504c36e0d29fd5f5880e71f53719a13847302db82cdabeee0036f10470e1f638. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZNJW2597420.