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 0x279799e5518947d1473155165c1d1595b9fe0a4f92787fefd3c1dbad7e96016b. 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/d052a705-e145-4fa3-afe4-88768ee376ad.json and https://artists.proofprofile.net/proofs/artist/d052a705-e145-4fa3-afe4-88768ee376ad.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ChristmaSkål (feat. KAGAMINE RIN & KAGAMINE LEN)
Tadashikunai Hitogaku (feat. KAGAMINE RIN)
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 0x1f41bb84a11b409ea2273154961ec5f34c685c30000cecc5fe90197696ae052f. 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/TCJPA2403609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053d12c1b27c912ab24a577017c88c5590ac37df5a3dbbea2e7ebd3cd3ec10b8. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TCJPZ2487782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59459852f11dd9adec59de82d44dba829b07f8deec458fc182baab6feb719cf8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/TCJPZ2487794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4adf18758b60bf6206d29628604b4cc4724f2107f3890ce2cdd143b1f77ede0. 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/TCJPZ2487798.
Nobody Can Breaking Down (feat. KASANE TETO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438910c650d77117693398e82d9bba84b8e2feff2904ed92cdce7f7b0c81c819. 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/TCJPZ2487802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98403d1285a0dc30f6b0dc5795de1c6c30e133c3e10dac0fc3c8879c2af72989. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCJPA2448190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444b472f58557c1cfa73aa3d72b17035fe0a8147e97281cee375ba797b2f98a6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPA2475519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ba519603ddbb85e146c15b0b50fa5fec91e21ad9ecf98f75aff4b01065e168. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCJPB2469016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a5fb24220ac804d0b0f3dcc7e001bf65ac5e12c39b5b99f6b65c3a82ebedcb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCJPZ2487916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f41bb84a11b409ea2273154961ec5f34c685c30000cecc5fe90197696ae052f. 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/TCJPA2403609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98403d1285a0dc30f6b0dc5795de1c6c30e133c3e10dac0fc3c8879c2af72989. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCJPA2448190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53c188b673d576cdbbaf7458898f7e51a0404e95651a0b92b59cfa63094ef49. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/TCJPA2463123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444b472f58557c1cfa73aa3d72b17035fe0a8147e97281cee375ba797b2f98a6. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCJPA2475519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ba519603ddbb85e146c15b0b50fa5fec91e21ad9ecf98f75aff4b01065e168. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPB2469016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef05cb0c1450d27535617f0147f70b6158b287e3e962887382f380a39dede22. 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/TCJPE2501351.