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 0x6a3c25c8e19a89f126dfa83506e5d85362351adda5534e996a2e52427578ce50. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bf007f2-a8d4-4a1a-95ab-1642f3dffc11.json and https://artists.proofprofile.net/proofs/artist/1bf007f2-a8d4-4a1a-95ab-1642f3dffc11.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 0x68ab6929c90ab9cbb0bf8593423a3d0ef6b926fde23b30ec3537b05d74bb8b18. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMGAC2200069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e273ced437b7a3e38ce462177ba4291f6f388812f2ddb5e776a42e78136454. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-17T04:52:30Z), 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/QZGXC2401351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5e1be9efa794185b50501072ea1aafef5a6230de940b7db4d2001d9ba81dbc. 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/QZGXC2401353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96f5c4d5547e437e1a16ff7c2d6f3548fe54ea9fb77f29e61e5dd8abd2a7325. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZGXC2401354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc586579c65ea6b56189a528991e0d27685c802970ef7c915dff950416f1fcdc4. 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/QZGXC2401356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978b46e95f41f4d767ecdc75925ad7caadc7fad4bae1d2832616a0140ce2cc75. 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/QZGXC2401357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077fa399c962d41148f6f80f990732d6d11e21807a9104541729f52569b445c0. 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/QZGXC2401359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415db521e0a72025ded019bb2868c8fe18798524f3d079cd65aba3cc7beb41c5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZGXC2401361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5e1be9efa794185b50501072ea1aafef5a6230de940b7db4d2001d9ba81dbc. 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/QZGXC2401353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96f5c4d5547e437e1a16ff7c2d6f3548fe54ea9fb77f29e61e5dd8abd2a7325. 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/QZGXC2401354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db414f5eca6456f3001d4865a64c782cfed551dd6d914047d3ed515a65c7ec5. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZGXC2401355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc586579c65ea6b56189a528991e0d27685c802970ef7c915dff950416f1fcdc4. 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/QZGXC2401356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978b46e95f41f4d767ecdc75925ad7caadc7fad4bae1d2832616a0140ce2cc75. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZGXC2401357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e851e2721aff74e665e7caa8597439b86cf676e355168642decbb3af0ce9e00. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGXC2401358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077fa399c962d41148f6f80f990732d6d11e21807a9104541729f52569b445c0. 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/QZGXC2401359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6374dffa74606a60634ff9fc67c64ece9e9002161a211613bf8abf9d07c02d78. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZGXC2401360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415db521e0a72025ded019bb2868c8fe18798524f3d079cd65aba3cc7beb41c5. 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/QZGXC2401361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab54398ae73428de1fbcd76506c5d7695f418d57f87f36c7ba1896fb47bad86. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZGXC2401362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae5837951dcb8d96443a45b280a01bb957711f0cbb0215cb564e9cf11de9598. 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/QZGXC2501010.