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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0517f2378e3ab13e963f82a3c7af662ecdf7aa8564edb88fd528864ee89ab35. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46fd2af5-f3fe-44fe-bd55-cb7959e5173a.json and https://artists.proofprofile.net/proofs/artist/46fd2af5-f3fe-44fe-bd55-cb7959e5173a.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bdff8733f3d060f11963e31635aa4f9ae1ef885e9627ea444072978fe7ea429. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZK6J2492439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77baa88386dd7ae46d43433fc840c92653895e1f79e634a48bc686878b195fd4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZK6J2492440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b427c5d6d3e91442fe391e1649709f79a89c98b4013abb35fe3444ea98dd4fb. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:43:17Z), 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/QZK6J2492441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c59aa24f787eeb129ff25257ac465c82d88fa7da2461db4b1d8ab259932140c. 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/QZK6J2492442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4897c1716f4657ae82fc2c12724e62a94c2da10764cba07b79e517207bbf809d. 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/QZHN32561382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bee10674aa75e80a1d7983e88d0c8091924c4d61ae8d32161f4531f415ec26. 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/QZHN32561383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0745616f32030b0ea8b3df62fb2c2467cb12a6a68c27131a3aadc7fa1b0fc9. 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/QZHN32561386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a16a681c8135e986941625fb1589a31f0278e4ab8a35b1dcdd73c1bdef1f0d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHN32561387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a26e4ca97368938dd3ddb939714afd8245955046acde3ed847225ecd6e1d9f. 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/QZTB42528737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912bde735802313cda654c1230100ae7c990455252f2da0e8b3c225935173d8f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTB42528738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e7e2d54c69ad524a69fdf78b7f5dddc0346a055d2279a17e21465074a35499. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:28:56Z), 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/QZTB42528739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090c33abc9a80ec8652e1042c633a5164487a0fc7a2a4872e7ff233d1c4941e0. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB42528740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec33d9a1f53e1207b75db191a6589678902378ca6740625c18fdf050c7eda97d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTB42528741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00be508d07b86b8f1fd2a5cb378d37562f828fd7e5f3128aa588badbfc9b0f63. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWV2364793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a9a206eb6a6d517db9b20e76fdabf152651d9aad92ab972946b91354272dc. 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/QZHN72334929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feb41af991c4fbd6468b49a6fbba7e1af46c657a5fca1d8538f2b3d7e4337d5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN72334930.