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 0x83db4e4731981812cccb28c5954eee8296a14a3594efd601d934d00feca9cf1f. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50d8389f-9dcb-4a4f-a0f7-e50ad831ece1.json and https://artists.proofprofile.net/proofs/artist/50d8389f-9dcb-4a4f-a0f7-e50ad831ece1.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 0x43329a360432c486e6ce4158b06255ca87a4361384806a06f2e8907fd35b5d0b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPJ902008660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5000f1edbb7730a4a618098215f70b3d22bacf11b89f21b2cfed7016f4e145. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPB602151915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef47ae58b0f8e57086059e784c48d8e2f11f4580e06296d8a888ce8e2dd8fd8a. 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/JPB602182384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d711be2dbe767f4392fc148c0bd931365b0b3166b315d3893f3b482f15f4892. 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/JPB602166452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21014b9488dbd033daf54dab11fff9bab7ebda535bd2ec9f05aaf018d04a345e. 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/JPB602172879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac7a09b593b8838114f7a5887316e3f903540cfc4287207459e07f1a0ddb21e. 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/JPB602177736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05a9e18802195527570f2a11b603339eb4a98f42b92c3bbbde8a513383f3d06. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/JPB602197963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9340f8254441406b4c31324d879eaf93eadbe85c7aab380bde4cb03afd319a24. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/JP92N2210502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5370357f5f29ffa84007eeafec339b6d13e8450c455393ee9db5b00af1fcf164. 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/JP92N2220604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf561df8f34e0db355f7a44a47f17a575e441b3a3c3389ba050985b257cc8a35. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/JP92N2239135.
ティーンエイジャー・シンドローム
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0748a582ee10ed702b4fa3d5bd778a5680a3a65a7c799fdee1ff8bdf45846c28. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/JPKI02313866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aeefe2dbda32f14aa5b390223c45a36a60a5094974c586d65bd00458b708b9. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/JPKI02313870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bd3df7da2e17dcc1571dfb2cf518f9d2a89331adfe75c1e4c015e96465e667. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/JPKI02414220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854473e34687072df591a0ffbb8d51a85830bc110df5e7fb309d1de01a03009f. 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/JPV752510909.