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 0x5f101b7e4d34667fd9a99992a6299dbfbfb0182a2f166fc26b40dbc1e6aad10c. 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/d67b05c8-ed9c-4f9b-aeb2-436f0f13a365.json and https://artists.proofprofile.net/proofs/artist/d67b05c8-ed9c-4f9b-aeb2-436f0f13a365.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 0xa1ed9364c9897131e4a5db5144d12017b0f1a312fb29d22de35c60087ecb123a. 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/DEN061600905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a91b6982da8304e58eb16c41f6a91c4d81e499ca8168d37ea686639549a86d. 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/GBEH42010013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a121cbd09498fcae8c2cf936e4cabcb167d4bcb8731a73b52fe4e3adac7a3d2. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBEH41910112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0886bc4f58093367e3b8e88c77f9ca74fae2364ddf5ee0a282db43a75aa6e9c. 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/DEKR31600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765f7f7c2010bc724e4d1265908451f1d25e297be541a59ecbc9b1f9efc21ed9. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEKR31600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902eaa5c1b32cca354b77ef5eb65a967fe810f59802cdad3aca81e477225a888. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH3131620154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeecc8e4efdd41ada8ed195a9c69532076ce90afe52a11490fcfdd97a180fdbc2. 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/GBEH41710004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2647c8250718aa9082b66a5294d1762481eac29caa294a766985b929e8727294. 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/DEN061902704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15152d299902c1337bd2e3215b2124ad8376e779376b6a50f02735e862f5994. 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/DEN061902705.
Kontor Sports - Nonstop Powermix, 2020.05
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869885e302401387ee8a95713ee85b045675a43df4bb3b2db982acc93f5d2e6a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEN062003613.
In the Air Tonight - Sway Gray & Lookee Remix Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e66012b9d4b27d9b44c125c06056426b1790c8a3a127756aadbe2411be5708. 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/DEEA51601356.
In the Air Tonight - Sway Gray & Lookee Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a85096f81910faa41da923229186c513e7108e921426bf682d13215cc2c1fd. 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/DEEA51601360.