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 0x917155bdcf8ec65b792dd5a9db6e19cda40206013ff58a2847bc49f4bb4e3dcc. 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/034a69a2-b822-4dcf-8c5e-2e302517f668.json and https://artists.proofprofile.net/proofs/artist/034a69a2-b822-4dcf-8c5e-2e302517f668.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 0x89fd9a4e9621de5a51eabd864f1c6ec258dcaf06e0572d829ef1a92c2f7d0256. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEB330392301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de30a4b40d2f3351019db86ebfccc5411460090b40ac8fdd59e5ae571efbbbb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB331022014.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0801a3df30542cc1f2fbdbf426f5bb97668d405c46d622d65776c86f6729b786. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:56:19Z), 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/DEB331018502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0729cd4fdc45191aeb6d4c3468008fe4bb72d2e895aab1a5ee372b3a4595f3b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEB331018507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1247d395dd0a35400855f8bc4b888d0a6ac1545f6b16c327a892bb6baef3be11. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEB331651701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04690ed464116e3e39e31fde8e23ad955a14f8ae27902c4525e0e109762b816. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB331651702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc654da4d49b7ca759fa0b00a370d943838c79844a578c39a70539a1c7c4ed1f7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB331651703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6dcc69cdad96f409a3f6968fb29f8fa35d3e124fd4e98e0a66ce9a4bbf3572. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB331651704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30af278076233a4443dd0fc94b2950b86d7824e951558ea2f9ce3dd832d483c3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB331651706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eddf8f1854aa13272bd274932debacadb6b417f185deed929b527aa35634af8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB331651707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3e9c75d129165c31468bb740b0f93c12b6fb432f74e2ac81c12b80212cd9a5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEB331651708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014490c03e8784d62af12e85fb033bcc49f65dee5a54679245406d1e1a01d681. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEB331651710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8fef61bd0084950c9b74a11bd9a611c967fc33f2b74c70d5b7994ef2230b29. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB331651711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab08921aaee7e003e3a8c843c3414dc1234bce1341e0fe715a5db60c4377e57d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332380901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e32258c272a05e13286d6c69dc0897bafc971a9b3a772d60786fb05ebf988c4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB332380902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c88fddaefce11e464f942b5569b0d856fbf52f5ad0be73da33372d3e9ec75c1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB332380903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848dcca44d564f6f611b8d1f4ad8e6d7fab4c6b68562336d41ed92461e8e44d1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332380905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bbbf0c50669da675ef4395649870abf9bbd600ee681209062844719a287f1a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332380906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264de526dff8b6c0919ff8b050101a7dae722d7145be11aa64823db03bdd403e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB332380907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3ee3b348936bd47a000e732b0ef0782a3828ad84f91a8ab4dbef60223e8944. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB332380908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fd91dad181f39c28f5c2f585204e8715f49f716c50a3699388d3582276d21c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332380909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aad3e44bfe6fe88ebff156e50c7dab06f6aeee26f32a34073a8b6c2526e6f1f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB332384601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26c9ac0a8d0f7a26d0453dfa422014084424ce3415d3134cc13d449d572f5b6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB332384602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98430866dff4242bb229ba43c77367927be09c0eaa1b66bff9766af768e33783. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332384603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3809baf6dad33845606b60287b5eb705e946d58b88a49de56a76ca1281057335. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332384604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66f2809cffb5e1cccdac0c776c2094166b634c1f77b24095374255b75fcfe28. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB332384605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262c1bb2403a74e2c93b639a23572ea45493b4e8a3fd03a30fed8fe24c59e537. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB332384606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a57e5fa74d4b7d706e8fa096fa8097dffed801f72f47d3ad6dfd7e37d63b86. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332384607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc4100a6a41f6dd308f587b8adafe17c8d2bda3a026131531709e149ffb6095. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB332384608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c940294d1fdc824bbf648f00ba58a61876e9b1a373e0b35c0cd795997ce480. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB332384609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fbbd21712362006c3eebd825dd1437acadb0f6aa14b7d114b5ff9b9d52329b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB332384610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1b93937f73fa4df8461b821fd1d85ee2d42d036cafc6111cfa6b2e54165551. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332384611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66f2809cffb5e1cccdac0c776c2094166b634c1f77b24095374255b75fcfe28. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEB332384605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98430866dff4242bb229ba43c77367927be09c0eaa1b66bff9766af768e33783. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEB332384603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e32258c272a05e13286d6c69dc0897bafc971a9b3a772d60786fb05ebf988c4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEB332380902.