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 0x3ff4626a8a8b57e38011bdb0e7d6c65a08bed203e1173025251ad564c0655ffb. 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/ef98e526-2d7f-4d8d-8e5e-bf26cd50b59b.json and https://artists.proofprofile.net/proofs/artist/ef98e526-2d7f-4d8d-8e5e-bf26cd50b59b.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 0xe6adffec8737b8ad39fb4246c96041ea68031e5d0620805820cd7efdcdb6a25c. 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/USQY51613380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1e24decdc2df15c8e8b92ca4ec7cd5d32eaeae98dee78b14cb4814ef836d17. 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/USQY51613372.
Industrial Oscillating Fan At High Power
Cozy Breeze Oscillating Fan Long Loop for Sleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee317c0665d650784054ae51b37831319626bcc351cdc95f95c87b88184781ae. 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/USQY51739503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4993c9758476fd81a7ac2870925d7471f1cd90cb80f3835bf97b200b14698c2. 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/USQY51761108.
Car Air Conditioner On High for Baby Sleep
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5102bc660afefd37adee13251081511ca5065c57e2e41db3843baccedc6568e. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USA2P1702908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f17d532299f3b7dc70c39794efd5c687e105642a165e5fd96f06da8b14d270a. 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/USA2P1874736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f17d532299f3b7dc70c39794efd5c687e105642a165e5fd96f06da8b14d270a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USA2P1874736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795e0f265e7bca9a68b73334c92b2e69dd52317751f2f9ab1a27b6f4281ec4dd. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USA2P1893412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e68c9f9b0af7bbdf589ce3f61fb681f7c57a73a5ac138181c5194641e92bca. 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/USA2P1897759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47590d244ed9c6129dd9cb548638ea2d791796a3c66e32ea5daee878c1b4446. 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/USA2P1930601.
Office Air Conditioner Fan Sleeping Sound
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f530ec82a48b567a5b5bf5be597ad08d4b68f2252dbc6572ca5cc712a98d91. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA2P1930616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763425daa11b89a1d53a26e2aca58a4b557fcf94137a78cee3a9e82407ed7e9d. 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/USA2P1954840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8296605e3348e21056d48d57cb29693ce2a85185df14347653b1cda5ee8b1d6f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USA2P2107819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6089f81694ca2d6906d259c59db608316f8d6d25746aa5c0249a8dfa871582cd. 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/USA2P2135501.