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 0x6346273dcfabd7816929c86b56905316543ca767afb6b9d9d24c489fe7761b6b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/98f979c8-3ec7-4189-aee7-909ef1e7a42f.json and https://artists.proofprofile.net/proofs/artist/98f979c8-3ec7-4189-aee7-909ef1e7a42f.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 0x3d247fbe852a59ea7fecdef44be0e226178087ff038f755a40b94f3151fd183d. 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/JPTO00700409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e5c64070d8b9d7e27c786d6fd943f8ecc044c119ca5bc7160cca405794d69d. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:24:39Z), 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/JPTO00700411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ea489b893eeb44a2223399f55eee73afe286a39510475b5c5c02a1f8094a45. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/JPTO00700414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6607fdb94a720bfa9d8bd415e17ec35ff856b2bee1f782a626dfaa57788af9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPTO00700415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15810c8c2bcddcf9f6c74fcacd8347a398c7c3b09059548e1092f2334854e795. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:23:07Z), 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/JPTO00700416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf123d56bf3d283f7f75999b958b390341b690a0b58806b14f0e534c10c25b45d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPTO00700417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68b00c0719f066eb4d5df677946f09fed61b4ac0123b64bfb559f578b0edd90. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/JPTO00700418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee46a18c627b1ac127d9f08fa26b90f58ffe1930cf9c8e0384ba64a820133f30. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:28:05Z), 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/JPTO00700419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ff1e30f270f1e28152f758957a59c34f4eb8f24c83115983d200a403576090. 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/JPTO00700420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ac341bccbd96d0bc17a596a79771b4f94e592d5954698a726b9b0607056d45. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:13Z), 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/JPB601106701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b6504b6e7f5311852b759a2f0938086b27f787caa767d3dd2e5945e391e1ec. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:50:22Z), 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/JPB601106704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d7dac35a26545be707710fd0dcfc2fb745841d737008038ef2037f7ae4ab82. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPB601106707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386c136c2f8a48ae7d0eb3a6cdc73d0f2c64f1d5581b23f5031e2754c01482bf. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:34:18Z), 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/JPB601106710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d033ca3a9f6e3ce4b957c6841dcfc1301d5464f99819fa11456bff84844d0fa. 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/JPB601290391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9c82fc72035cba975bfe959658831b486fc180614d7c9fde08b8420eedf9ad. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/JPB601290396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8319e2101c1ca932178774f9528b4e3e3105a912e8fe056d1df82416a4a02879. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPB601290392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0423115765dfa5a2191e00d0aef7f4355f6ef6bd81227ae28f8dd21450a2e24d. 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/JPB601290394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6eaa760a1e62442dee469342bf86dd5a6a0ef094b6064f1a549df281572b77. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/JPVI01409480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4d1dba4c06a48896c2c417c5f52922f6672a685630a4afd4f857aacd852e6c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:04:33Z), 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/JPVI01409470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceb044277768dcaf69258779ce36edfccb001b6d8d19efdcb7962263b5bfc0f. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/JPVI01409490.
ドゥ・ザ・キャッスル feat. 北のパイセン問屋
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8caa8235fd73417dd6a119f7be454feb21b2caad9628f0c7ab8e9e2068d3918. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:18:52Z), 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/JPVI01409520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37fbcbae801a2dbb52f3f139dface50d93284927004e8189c1ab282ad64c9e6. 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/JPVI01613050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c31f11df4c896e9026f04f8352d626b1f148fa8a24c85c502e783bf7a4476a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/JPVI01613080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0735b09895b706c1f5f087c07d996ec16341c0a052a779b7722644362fc0d6db. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/JPVI01613100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f84f6e2db6c234b0c4b0ce07016990e28b66343b4e554e4d23e91a122db58d. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/JPVI01613110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537cd80398071ce99a85086209c508614390fe5238e4ee3aa78e1e85d055634a. 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/JPVI01810251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff61e365a230e361458353a9885d7efcee9973bdc51a86947b10ffd96e53e30c. 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/JPVI01810271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417dd0cb2c195507617422f0dd35abc5fe75ff2af78ab8c15823363898ca50a3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPVI01810311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b2c4c2af6324bc6b3d326e398cdd3a4fb2b7670f3bfb11de600201827f8cbf. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPVI01810321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa57b2ef3f10b77de7467a05cf9066c20080f0bd0f8b73bc18738a7293f52c1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPVI02000657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa57b2ef3f10b77de7467a05cf9066c20080f0bd0f8b73bc18738a7293f52c1. 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/JPVI02000657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c4093cd0f5b0c0b5819b9f9162f130feb66399e66e54903c4782a03313c0d0. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPVI02200555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5f4cad40d9bc95760ab5bed82fa07c7b1149277506edc5c5b608793ed08201. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:53:25Z), 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/JPVI02200560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a59f4f3e88c740f3d48d52738aded8f2b5dc013df066a1920fe9a9bf778fa42. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPVI02200562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d620c2a1255459b129b4ad1de1bc069a25a632a8fe87f4f351a4f6f07e6d717. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPPO01801494.