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 0xfbae2c34fb3ba695cd9947e19d438f24e96611be9cd17abdfbff41bdee17fa0b. 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/2da4ceb2-8ceb-4225-a9a1-d5d77824d88c.json and https://artists.proofprofile.net/proofs/artist/2da4ceb2-8ceb-4225-a9a1-d5d77824d88c.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 0xeccc99e535db1636d5ed4d382fd25617ec31f4b1072f66ea487309196da1d48d. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USHM20328284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9119c925e3c03b71992aba0997dba18940d212de48fbb9178ed2842e04a33a8a. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USHM90598268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0585e1abb515dcf7cfb3d6274214826fe97666c8b2286dfa6b13bc77cbe7a15a. 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/USHM90598269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2c6d472549a240a7c8e843cbde8c8554292c7b9810c9ca58209f38c367198a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM90598271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbf7663b67b4f477836a89fe63c1ed6deb798854344fe05f05aadcbf4f1d0ff. 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/USHM90598273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65c891be9a68e8707a1ca396c61959bd38af871a7c3a66420cebbc3ef2a6229. 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/USHM90598274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc61afabc09ff9ea0263e645e43d0c14f8b98ce2b8b9e6419b17b1996134e952. 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/USHM90598275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb871248668a6500dc2ff8bc90269422d35ef1fc64412de693e2f6e6dfa29db65. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USHM90598276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd8e608890c005351f0e8ecce8853d770c459ec04f585412c85144aeda51f8f. 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/USHM90598277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb7390b63b3b5702eb5861b2bb9d8348fd7034b799aa9e4e5ac8aed8eae7e16. 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/USHM90598278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201c9bc0832b4872df8d6da2e07da1e99c549e75daf75d88539e21c766a574c3. 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/USX9P1264873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd5b3176008864d04cc23566ee54c2adb819c1d0de3add8732a7afb39d30094. 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/IT3CK2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d532f258dbea803467da065586931c8f5be573cd9831e32a1fc4d567c1eb21e. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/IT3CK2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd79985038037792862f46bc83d0bb5903f1eaea146f501d0e8cb859edae0663. 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/IT3CK2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9de9cae9fc847dc714acf458968637c5b127b9c470faeb086720954d4ae0413. 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/IT3CK2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62878f18a410a9275ea3d9d8ae3cb633296556a91e86cf410779d6d4e43bbf5c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/IT3CK2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e6a9774abbaacb7491c9eff6ab8fe07d71a7160c10254345480d6f5329b0e0. 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/IT3CK2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fc7fd79b26be9a24016465ee83ee750bdde63218f845e2af89f1f5f505a152. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/IT3CK2300024.