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 0xbdb645c84031e5179cb509a02af97f2898f847f7a689911a0c8c422afa649d27. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6eb33d0-b887-498f-aefc-73ce1cde6050.json and https://artists.proofprofile.net/proofs/artist/a6eb33d0-b887-498f-aefc-73ce1cde6050.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 0x73a1954eb7276e29cb568b811f9046c1f1a39cf9aa873c026e0156bf2b1c3a13. 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/JPY392402534.
音楽的同位体 狐子 COMPILATION ALBUM イノセンス (vol.3 比翼のイノセンス)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899decb387c86d152c637e7a2d5185e5573470fe8355b225268d3a9fc5e86410. 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/JPY392301018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d675fff4e75024b624d720d9ba6189ada6c6abfbe2ffab57eae98b66eedf31. 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/JPY392301188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a74a1463b0119dd6400f25a6f92ac87aada36e5cd65887d077d5d28ff17e11f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/JPY392301017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c4ceaad0d55042bfa8d7e8d6107eaaf77087e529edb66a72151ff16f751539. 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/JPY392301327.
音楽的同位体 狐子 COMPILATION ALBUM イノセンス (vol.2 爛漫のイノセンス)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b5c6c17008a1c37da73cae22fd1c2089b03c01330b7cb660f50f53634fd136. 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/JPY392300888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0b93b45534c5965134ecec61220236209578bfd1e67d06483c507bad930c8e. 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/JPY392300889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8f15def60089d9cca764f6adf383afd522014f9d1aaf06b191dac9a0ba13d6. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/JPY392300891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0ed097e271662f33adb5514148d5bb893d8d2147fba1ce76fec1c6e8cd7079. 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/JPY392300893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcf19ce88d3a6abf4934743dbd21e5a1a101b9e3db3810b88518d4afc736770. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:02:27Z), 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/JPY392300894.
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 0x27ca22821339d63b93ac4c5a083167693add1ac54aa930be54592ec3549766cb. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/JPY392300955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637beb5e9cd257ee221b567ba2e26dd8083e438e2dcc3a72bb5cbef2d6c3950b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPY392301147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cdc257a563ea9cfcf1d9737df5011e1bf99f061e7bca4ca43c2020f4ffc10d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/JPY392301019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1abde71710ceb414293ddf6f540a1d28ce15addf359a0167abf64c5c4a2c6dd. 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/JPY392300890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea9c02adcaef9f382e261102fbade082a43e0f3a202d1538c77cee0372e6771. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/JPY392300892.