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 0xaa17875f6379fdfac9a217e2c3d657ffb4077fa3f3cefdf71c86ad31c12f3cb9. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64eb1644-1900-411c-b6bc-a81c5a865415.json and https://artists.proofprofile.net/proofs/artist/64eb1644-1900-411c-b6bc-a81c5a865415.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 0x1af170c4c75e93c9eddcd650631f643eb87ceaa7c6e1f1f18080519599cdf308. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T13:59:26Z), 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/TCJPX2343817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3883b0cb858dd7737a8ed0afb40097b33ea4b28eb00c9d7c3f072005f00929. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCJPY2369750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee5eb4b5c1469a4ba49e78da16be7e34d2bc38979f1f8818b7984812269dd79. 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/JP92Q2200474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb5d1d1add4b7370c7459f8ca805449b1201f16448912a23b853e9b64aa734a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPS2291193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7629421cb8778e403a741a37952a252d3ac3420ee66b47ea2be961bf79bcefd5. 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/JPY392301662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7974656a35abf7a8fba402378f64d8bfbde11ea1b6f8d391d9a0a6fbbd92163. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPY392402412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5608ae6874814157aed22559b07f68694fc80c5a47af6924a691f88fcb174c2. 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/TCJPD2549503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7974656a35abf7a8fba402378f64d8bfbde11ea1b6f8d391d9a0a6fbbd92163. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPY392402412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef19d9f9aae47528cbe254cbc5897269c011643b4355b4c44ccf2622f0626c57. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:03:53Z), 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/JPY392503290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cec991019db2b5a4f2097603d5e8481366608e97478ba2aca44b5f5b12dcf98. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:48:58Z), 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/JPY392503291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b39bf5c1d5b645a13d1a9d10b9d231e54d7fe77949e567f457c7fbbfebf8c4. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/JPY392503294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7629421cb8778e403a741a37952a252d3ac3420ee66b47ea2be961bf79bcefd5. 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/JPY392301662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81672517aa3c2bb2b7886cf931fc76894c25c850b70dba2fc5ab481e6f3c81a7. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:51:08Z), 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/JPY392503295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec4c96e3dae73a6e9c4bb1681865e8945e00ede1d7fd29c8b2125455cf4ef86. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/JPY392503299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123f1ba0911e9377f366d5afb77711e5bf28d04bb8588095d4e7506c2295e115. 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/TCJPI2546148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadac6d28de1d9c0e1ca2980df71f6bac59eb71ade50ea639cf5c10995d0e7f9b. 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/TCJPI2546267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87c021d0b3e885428a22f4a97e9e7187f264b5dfaa996a4c662c4e74c8551af. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:11:05Z), 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/TCJPI2546271.
それを世界と言うんだね - ど〜ぱみん Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75eb2f555900037a8f945bc19790cd43858970e7d14d6ad4162e7d87b45291d9. 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/JPY392401773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc16b78cecbe5ae4d28167af48565b17caa29631cddd73c39c521b2d8eec9e5. 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/JPY392301023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7629421cb8778e403a741a37952a252d3ac3420ee66b47ea2be961bf79bcefd5. 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/JPY392301662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694d6bda6cf79788be7a0fe5bb72a136ea7160de61fe01bb6d413b70fb479eb0. 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/JPY392402441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96e0c52238dc15f6046c2df9589e3dd4d5f9c3a38db00046a35dbf3d1184009. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/JP92Q2400949.
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 0xb95c701b1a47a263916128fdeb2b7cd63470e09e2db1cc8c921592c85d812e29. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPY392401856.