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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33985214fc2f4f8a4a6cd50c7e5c8c1c131782f389ab0898fb62f64cc8222b32. Chain 2 (Bitcoin): anchored in block 953701 (2026-06-14T22:16:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7776949d-b831-4742-ac5a-dd7e64b1f094.json and https://artists.proofprofile.net/proofs/artist/7776949d-b831-4742-ac5a-dd7e64b1f094.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9372803121997cc9f4fe9b7d582fc740e00e63e2e8b1b42bc37bb07c72f1668. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JPI101501264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fc0a6f6ba454fb4c120de8a7956da813ac013c810204216207a41768c2ba09. 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/JPI101501265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80271a79152f8c8528013b32bc350d197d206c41f1ed7524e4dfda41dacf4bbd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPI101501272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9f07c55e535cc97034a57705de304d484b630066b3e97208914cafa11b7dd5. 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/JPI101501266.
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 0x66b5326598043e382b891c3655ccbfafbde597c00580b622ea4d4a785ecbf4b4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPI101501267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2727f1059ed025a776e7d3f0d486b587210a08be2f5afad57bb71cbb20997578. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPI101501268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428aa030348599ac45eb8027145a7a302e31eaecec415a6b40551436d37e9329. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/JPI101501269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db546ad5e620c35235728a4e9fefd513721be34bee7c107925587e9014ddc48. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/JPI101501270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f40988798574f9ab075205f9e8f5e519b9be603d550e4105fd2451101b198f. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/JPI101501271.
最終楽章：魔女と七人の美しい少女
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bd2b7d371e2c0857dd1e2e928819d4de09c6705c9418c637d0b5c6ba133e25. 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/JPI101501273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514ed28094e35696295eb1913d2867552b3c85e46a3b4fd8df868ba80eafacd7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPI101001972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41459161f6b6c16f889bff5fdd2d7ebed7111bf86a023db04862588b914d736. 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/JPI101001974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53423957ece342171f335362de29959155da0dbcaa16039076192cb0e8e307e4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPI101001975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d09528bea5284107c8bd9e90752ca007b8b8a80da10710b87fbdd368f6f785. 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/JPI101001977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb06b497e3cd659e11f5ef119d4549465cd69b9fe21a2f5944ccf9525761150f. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/JPI101001973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc936fd5d73900ddb5f26124a7579b99eb42e2158c43f0617c08d1ead4269e3ee. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPI101001976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb086722a3af1778db843a0c980e4ef10b07155eec1ebb39959315b7329ddaa. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPI101001978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d4e73937ef22589397e6f30a14f4bf5c44da9369538379c785308f150d807a. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPI101001979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5991508558c1a754bcec3066aa5d5bfd77a0f1e0b80f6756bba5cf753aeaeca. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/JPI101001980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9766e3cc525f897d685543c63adc351ea68a9324ab9a2fbaa28cd753d395125a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPI101001981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f92ea3adc1f25562ff1942cb10cc75c18ffd8a0e83ec40ae4ac1cfb1ab9a81. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPI101001982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8918b236995ce914ec348a873b991ef1311515ea765eadd9831550c684c882. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JPI101601326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1a6d3fa03a0ac0ceea00488403394f308d7789fc24950d5543984e11aabf26. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPI101601327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740ad7c39c4582d2fa4f36267d9baab5e97fdd89a2f0223a5ee9e9ea284d5b3b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/JPI101601328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc4d8c0a6a6d95d53ea12dcb84782193178a510a4b9e5c123a30945c46dfc8f. 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/JPI101200435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e966f0045d3c86db8ec38e2e86d978b8b3b9bc8d03a44ba6f72797ca541660b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPI101200436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0f1278f492f43a90937ee5ff6c5623aec75a6cfa2a5ed5f31a917d68e763bc. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/JPI101200434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399c97f0a712404258c21fd78ecbbc60588ca8f3fff465af92125da01b510a4a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPI101100766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e9b472ba3db3f01d43d1fe5ac172fa54f5bb96d190967bf116c4080c559e46. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/JPI101100767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6340a100853e525d67c1b2a3d7449eaf99629668690b918cc053e48a1551af4d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPI101100769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da792f7ebf6191f1e9ff4d79eea7da15cb92e417be57c8bf73186042c221012. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/JPI101100768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f98b02e9cccf4b01150b059a4b483a82979916a88f807c1e994e2b01e89abde. 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/JPI100902916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea2a5ffca13b75c1563162bd9e1cbbf2a5cc5f25cc7f444e39ec07fac94170c. 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/JPI100902917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f086c2bdfc0a993062baed3d65bc2b0bac0772b3391567af79c934ce0123891. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/JPI100902918.