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 0x5b8af76d855c1868155977694cbbb9a37b3070ba1c1e4541e582ed4e494aacb1. 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/00f22f27-299e-4279-ab73-eeb8f8928688.json and https://artists.proofprofile.net/proofs/artist/00f22f27-299e-4279-ab73-eeb8f8928688.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 0x0212cab0412ddf576d6a6d9f2764e092ee494f54f806856bd16c39e9055091cf. 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/JPWP02000535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e625628e28f44e48d408b8fceab560078b04a1f8e891871b3fc33e916b3af3. 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/JPWP02071315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5817161e603c3fd2141b67c806500da3e935d3e5bd7b1e8a6559bc7698217b. 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/JPWP01970412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25f54600226ffc39ce6d1cd93b13956c9535f55ec202af62227dab418757835. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:05:58Z), 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/JPWP02071317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deb32fd5838532664f820d866d123b2b3934ad85af7bd23bdfe4e690bc57087. 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/JPWP02071321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8232a1f4df7ede4ed8622b3c025664b69d48a1dcf030169932964938dc0384d9. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/JPWP01871243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f66674f548847576b4fcdec632b26adac147303dee33492de9763ff7f4d694. 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/JPWP01871245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7f36a2d86b93006163940d5a8798ffee87aa8f0f707a13791b4131fba9e7f0. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPWP01871248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c594876e5d72245258aa602d95e775d99f35cdecc0978645880dd283346a24. 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/JPWP01871249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710040c72619056951bb2650754d9ec4b524edc533474332a790850e3029ba8b. 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/JPWP02301374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03fac640e48e55848376692e6352aa6d91eee71d69bafd91b3c984c48f2ff3e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:45:29Z), 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/JPWP02300866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8da37578ff2476c6957ede44e9931673848c365352ff7102514c024e69d969. 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/JPWP02300868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe17fbceaa6603ea47ad75e85016474fffaf934d5429ef9ecde351e04f501c6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/JPWP02300141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972329de86b365632029063430472a01750032f5da5aa4ff3d6ec14d175fbd3f. 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/JPWP02202260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a7cd39f4dcdda7eaf4dbfea0dec96217691c6fd6bbe3021e5f2bc648866260. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPWP02202214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a0c781cf98e2cb22bed3ff9f053d4d5ebcd219442069ebe232f85bcad468f8. 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/JPWP02201950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63fd18e501e423184e5419955e9e1cd5e204367dad53cbc22922cca3cb462cab. 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/JPWP02201774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8bb74c59ee7ec376cb0794ef7cf61e054fc315cd94d249168260da769f368f. 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/JPWP02201624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba85d8e01a18c8bf77aa53fb218dd94aa9b3b0b7addc092d6323be81a120440. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/JPWP02201247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54488e49a33c764bfee629813667b20a8c37a473563ee5e1932ff6097456970. 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/JPF702200901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deb32fd5838532664f820d866d123b2b3934ad85af7bd23bdfe4e690bc57087. 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/JPWP02071321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0212cab0412ddf576d6a6d9f2764e092ee494f54f806856bd16c39e9055091cf. 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/JPWP02000535.
もう直接言うことはできないから、こうして歌にして届けようとしてる。
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5817161e603c3fd2141b67c806500da3e935d3e5bd7b1e8a6559bc7698217b. 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/JPWP01970412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52ee16e18ed3539832567df2acb905301dee222313121271e3cc7bc266dd02f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPWP01771250.