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 0xdecbd890900a1dc814b1df566be973f57aa18ff003e7244c41add2a6d75cee13. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9f7d549-e698-4da1-9e93-c3c3beb50359.json and https://artists.proofprofile.net/proofs/artist/e9f7d549-e698-4da1-9e93-c3c3beb50359.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 0xa72bddac198568465aca36281a02e517019fe51ecdd443b0a09ec5a728e4ef1b. 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/JPBV01021192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744c36f67392e28fee26213584ab33a07717210b341b6867a2b7a5c92299b725. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/JPBV01021193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad55a044bc9ee0a842c41e85fe03f2e29fcb3517ac57bce65a9b8fe56fdb0277. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPKT00003506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d127699a691bbba6d5e89a24f66748d5aa10078d0c035ead40d79c3be9b5b7. 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/JPBV01021202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70327d85fed4d3fe227f3e125004f8a0f652ce4d8c3c62d0b3276d9338bfc5a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPZ920704297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4995271b45ab92eb9ab0e18d04ba6395ed6d62174f69d60d4ed383a058207c33. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/JPZ920704298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0951039e08d0fb0dfe57adb4553930a48d3c9f0daecbbbe15d5f5cc3c7da5f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPZ920704273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb415bbc5b49ea259a37057c4567eaacc81b19effe48e366f76937aebdbf355d. 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/JPZ920704274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d2f014b78c9a61c12d750b2501fb0c97f103bab695d4f515056201af109c79. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/JPZ920704275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fd7852f0acc8018a057e73a502b5702d93e5d37c857c9586c2cd626488aa0d. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/JPZ920704276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cbe8722232782a8fcf7ae50d8f359d8594b1d7c33fbf1dc583f60345380323. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPZ920704277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd203b4eaa3128656da8fc2614af26c52156ed83d7ef1b1b5af5f538ad1e5f6e3. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/JPZ920704278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10f1f42aeb44b364514ce1847442f674e3b663958ad7e7cdf8f05f852440b32. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/JPZ920704279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc714e786f05b664d7fdae4bf53393bfdec0765003aa9d92c02f9e08321459c56. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/JPZ920704280.
ひとりじゃできないから手伝ってください
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e5a5a629ff0278f37ad0564de27cfd702e8528f5b7c37e71189154ab698b39. 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/JPZ920704281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d89451cd2ed76fdb18277d9634a69bfd8a242973f77cce0eb2419cb18652df4. 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/JPZ920704282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87473d51ab7c4635225e5775e9c580a47cf4a8140a114ee59f580bdd7c93a432. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPB600907201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc259d410ace9b8efa39772cacb5298ba8b4292203153df3fe1436b2025d665a3. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/JPB600907202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7ea360d38acd683266a46882e441c15ffc06e6861916897b35a06e853f658b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPB600907205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e1baa95d443cd1d27bf532f3faa7a89fddc62ab920a02080b6a7bb6178b542d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPB600907210.