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 0x6dd9f7a751444805d944af859c8ea21614545d62b48b8967d10f882b89787176. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5401f4cf-4f9a-42e6-bab0-b385b0809d81.json and https://artists.proofprofile.net/proofs/artist/5401f4cf-4f9a-42e6-bab0-b385b0809d81.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Do It Yourself!! ‐どぅー・いっと・ゆあせるふ‐ Theme Songs
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 0xa75b63e5d5bde8098e579262484e90074e8d53184aef4bc5090b2bcbec98f0d1. 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/JPT552201160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1166734f1dc486996e8a9c1288ef9b071272047bbc54d1a7c22c65111e2cd95b. 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/JPT552201162.
Do It Yourself!! ‐どぅー・いっと・ゆあせるふ‐ Music Collection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab6afa7caab8039dda0484a4f54634a6227d7cb0c4b0442819a6f9d3ee243cd. 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/JPT552300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb5a4eac9aca58253cd322148d24b76e8f5edb86901813a408f0f449d00f217. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPU902302826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ec64327408d63504f5ee58ba04d469c78b613acd1bf892eb49c6f8e4e625f6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPU902204963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dd8ffbeea4bfe682d54760f5e4abc1482709f21525b4cbef2c0f7b559db321. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/JPT552201223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf097cba217773d5a6e0c4df339ef501ffe88c290cb17b0c4f7bec26359dcbba5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPT552201161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3bf3a1197995ccdf1a32d554003bf9070c162376f38dbc80659959f125c6de. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPT552201221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67057d78be79ffe093b0295b8e97a70cad752beb66740498c6ea134727eb466. 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/JPT552201222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfe1c60fe2162990042f96f7a33456281f0a46fd673e8594a633b66ccc26109. 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/JPT552201224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24be1e6342103b24b7ef83047ba5615cdc8530efcb68c3c36f3d64e9c35af42. 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/JPT552201163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8029d241844ceca3eed4e0135dd9f1630b2065b3a9ac83d26bf0bb68a0c0ddd7. 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/JPT552300115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652849d5b2ec44aaa6b9fa788bee54dbdd8c7a0271f2f360da50528bf4d889f3. 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/JPU902302829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9ec64327408d63504f5ee58ba04d469c78b613acd1bf892eb49c6f8e4e625f6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPU902204963.