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 0xdda34ec16635a2bf8f4b02f26c207d85ec56c1be694a518a0e5b987e0cfdf5bf. 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/e2a88caa-e07e-4d6d-9d10-456afd2b4531.json and https://artists.proofprofile.net/proofs/artist/e2a88caa-e07e-4d6d-9d10-456afd2b4531.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 0xbe5997d31c5d5dda315c53a58c4aeb1ed8f1ba7b58c239fbf96253073f073126. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/CAU118800947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ef893fb666140eae9f02bf926aea20b3f9974fa889bbb19433b1c9e0aeb8c1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CAU118800951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c55f7cebbf6905c142ad18b1fba9d5f2cde76dc00bb970e9ad4fa4d32a7e9a. 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/CAU119100959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbafce8411b5f32419d01a029751e3e3d882cacc63752aa47068119f0194efe0. 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/CAU119100960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39469df5d95caf46f3334725e937d94424f0877b20d2120e70075447ab41577. 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/CAU119305714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b403527e277360b034a7be421841bec90ad7df6003922d4a61a0c78a13e9ad. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/CAU119400979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db39bac367acbcd33ee843e22c1abb899ab597805cbcfe7b9cfb65674ed409e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CAU118900987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda0ceb62fae7d03e1563ed184b2589e430d8a03d5b639db8b1bb4aeb30522e2. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/CAU118900988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a704266894f1a4ba2ac48e71a4890d8f9a2b9e9f85e070974cfa93aa198d86. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/CAU118900989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad71925b454590e96cd081183d25c5ace9116f7e5108be9a3eb7916abf1c6ac. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/CAU118900990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f7b1f5748cc26bcf35380b1bcba25c9dd1debd7cb324d25786e6cabded3c4f. 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/CAU119100992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ae55029befe5e7ca674472a167722a64c7ce9195b6be7d45d801452c5f0673. 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/CAU119100993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629b9a9a295506b8a96d8be7fd471963ecc6de9ea01ebd4d2c8261f9f8fb04dc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CAU119400996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2543cd459a649434a2bc267c7ac59c33cf283fb63e00d502fa2c1bc9a2bc2b6f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CAU119400997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1493305c9dd6c6c1935abdf9b350fd1cb8c1358b2aec5409bdc2fa231e800e62. 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/CAU119301000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a5bccb30aa0461462a7f151563f67b18809ccd32505443cd2446900c189a25. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAU119301001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec2b78388bf8c29ff0d802ef0b9ea01282e446cfc2772d255780f0b55ef88d2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/CAQ521131001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b5f896b689553b09bbf6eca12dfc55543eede32845f21568cf5161d98ae82a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CAQ521131010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ef78d31e7bdb62428ccec8fc808a6f17fd9ba28ff8e242380372ee805a0512. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/CALOE1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37302fed154babfef2e07341ff03b776b863afc567aefacad7c94a8ff24e5492. 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/CALOE1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddae45a244b0cf64bec88e7369f0c46fe4796c47494282bb9b9bf909849a21b2. 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/CALOE1400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d00a977444c54768b7a4eab6c3294f1a25477c34cb3cf67daaa49eed6a1b182. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/CALOE1400014.
Tu ne sauras jamais (feat. Véronic Dicaire)