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 0x1d98cd40015a98a8e259bdcb01a22616ab58223f8ee7cf5abccf1816cce6a1b6. 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/5bb1c09a-8c43-4f8c-9626-0511d94db32f.json and https://artists.proofprofile.net/proofs/artist/5bb1c09a-8c43-4f8c-9626-0511d94db32f.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 0x710c1bd2e852cfa237e9154a2837cdba22faee5e45ff6838e9d186d25cbf3b63. 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/IDA141802693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fe72908b35f55b03661be9afbc43931d59b203e9c47877b0e4634028f1887e. 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/IDA141802694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae8fb76e22d1aca0105675e74f54af1eaaefeea4056d961737112834dbd6b6e. 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/IDA141802696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556e3bbf489804ef0edae2307c6c0621269ca2efa80a0e566f05a9278148699a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/IDA141802698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35488aaa0e42cb6355a264155fd98e3b70b36ba04a169516c70624fb60331ecb. 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/IDA141802699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749950ef2d13fe90a53fd0c252d251c39533814825a1513ff58f411e50246014. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/IDA141802700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55f6797126254581e568e19d66446414948442e2d970c29d7f0d8619bdfb2be. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/IDA141802701.
Compilation of Talita Doodoh & Pdt. Jopie Hattu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dbbcc580520883bbd68f69e05e21e28cce7592cc37b6dd60b833aed59321ac. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/IDA141706497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3e69de7286439191faa1c712d5744f98910c281d8c8790a2076d1373c89924. 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/IDA141706498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac88bd80b4aee85c1959784e4a5917e17cd4cb0f090ad767921bdf2f6bdfc8f. 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/IDA141706500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860aa13afe1c9c84a7e019cd1ca94c181aad9f191740248e46d74f1b0fbd64d4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/IDA141706501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b327dd44aad2a3097059486a90c841ed6e16fa953069f3f92e2c0c00cc807f1. 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/IDA141706502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa9e151ed5e7828c1b74b94fc1868997330df06f7d98b0ba10eb84a3f08fcdc0. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/IDA141706503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13644eb95b0180bac58385abcca2e68aeff3b2abf09267c8bc907ec625d2d5a4. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/IDA141706504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde1fbf2be48393db3e4310272c0f4a24fbf85c8b5744c1d1b36e005f3534b7b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/IDA141706505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5e265e85f6c229116eab3b5f8a97039bf3f9ed40ce89f2912fe30632de6b98. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/IDA141706468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc991d2140a0f4a8bd688d45014a8c16143a63a816fdbf45e294cef00bc359d0f. 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/IDA141706488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1053acef426c4c00750cd332436c2fe817a7d0e740f62e5c9d7ecd535453aa. 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/IDA141706490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd45adbcc0b02db2825d8640b974085a4490918d1656120b8e28037ec5f5f712. 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/IDA141706491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452df855d8364fd379db095811270cf6f48dc8f70a21c6d4e450049f8fb5c27e. 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/IDA141706493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf728574b61a44825bb51b18afa991bf18249bfdebc123477c8cbc705240222cd. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/IDA141702691.