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 0x845e9f0aa24639d314b1e78d64b6d0e876df7e396b0406a2a098ff9120102c66. 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/02b61b64-e7c3-41a9-a2b0-83d4aa834e23.json and https://artists.proofprofile.net/proofs/artist/02b61b64-e7c3-41a9-a2b0-83d4aa834e23.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 0x2b95ad47f5be43cbb3e6c9d8ea903d3e3233804084737ad2478de7183d5e272e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZPLS2404571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf76a2630b773b1593ab0b6b59cb9b258a0ba7cc5731fc1c5a6bbeefda7391a. 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/QZRP52493179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c4a293365416e6ac473cb69fe2566581f12926b44315c55b0e014fa45ae32f. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZTAU2419217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bb43dd243c7f82cb1e5dcb6ee6f0cf6bb808c494168cf1e44de26e0513b798. 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/QZTBD2400606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e5834bbafce53f657ec7abc8c8f44f3c7e2c0df76d8f46b60f0d85e3ed630c. 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/QZWFH2455914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa366ace41f4aeda1557e81eceeb00ef8e1b93159b86d3e75961fcea86816bc7e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/QZWFR2451338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c68f49ca4cef22f327b6b83906a7aa143ffc90af60268cdf6e8d67ceec664d8. 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/QZWFR2460250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbe02e6219590bb17368a5348ba32c517af43806afd4e3e26a79c6b84161b86. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZZ7M2479204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2cec0f586136254c618176e30b3e24e8e003f6ea68baba885b41ddcbede10c. 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/QZZ7Q2483293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b992e12a180cd26762d6723ac874855f8c471ac3e5bbfae8dfd75383a806cc. 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/QZZ7N2438116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28914840d3846725bb6c343de0f73f3fb5aac0341db9907265dbcceb2ec0530. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/QZZ7V2459010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9522c0e4bad490ee2b3685d9a84ba0e4f79f2e5462204921c115011e4f355454. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZZ7R2423681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd781896812a737d406f968c83176fb480c71b3fe6d99bfb1ef9869ea6786f1de. 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/QZFYY2528370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5e0f0ffeca00078048f77038ed7085cbf108e8bec47c379faea11a94708ecd. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZFZ32514373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eec28922cd8cc367d42e8420ff5d59754c378a9b5e455043b4307d9790b4b92. 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/QZDA62531717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05db66a28191de1e888b6dcee5d04f1c1b41bca8ad7d14dcdc77d78b77ca649. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZDA72514072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbdb60c53558639b742dc1ae7e592c5b6296adba3c34d8e72c471bb0ebec45ed. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/QZDA72512356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0297dcfdecc07470b06fc58e04fe9871a4cce6d0bbdb677acdd0ab115ff275a8. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHN72596909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bb0b2aceae6dd7965936e4d542321cce6721365e61299e4b9811fd1eb8bdc8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHNA2585863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453b928d5121d8f60f7fbca7e6eb6e7171f2cba9b521b45c17ffb3b4402479c0. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZHNA2587234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dec6bf869106f0c096be552060c9d0775063c8e73868605ac90e5fd8e1cb72. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNWU2558125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e1b8093168e1aaa1eaacdf8072aa263fe0e78e0db45411c262fc568d10580a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZNWU2558126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7871a2f517f5bc44ba1edab39ca8f9cea47595c9f779500fb6a36efdbb6f3cf1. 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/QZTAS2512296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7d7362bd8cf18291bc3f59201e20564202ccfe6bcccdd837928eb9443906be. 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/QZTBA2574881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17da856c8af015d72069f179ecf138d42ad84e7016e93ac471bd06cc7ef2fe7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ782594426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bff56262925b255c74673c886eeba04b05df5683ead8eb4f263d092b57e5ee. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZZ782594427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8cf5768bf387878e96ee04ef2246ad7c7edc685cf3cea73252cf28f22d4d86. 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/QZZ7K2538155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329e2d06523a2d600932959684f8e6b75e09fa3c748444f49af829b58eef7dc4. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZZ7V2579447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fe2b96c21bc8089a15bc7ea619257b1d9457b8e7e534dcc28a80c9b4ba6c79. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QT3F82505745.