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 0x77d93daf4ab6629f69e5d1977e4a036124a5341502a5458a610bd3df2ba211e3. 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/7d7d82e6-c4d6-4bc7-9288-0aeff0930b26.json and https://artists.proofprofile.net/proofs/artist/7d7d82e6-c4d6-4bc7-9288-0aeff0930b26.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 0x7fd68293f064182b307213039ddeb2aa2e8f7cacc296e8a0ea6436239a93d5cd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCJPA2493100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109620a77eea1d04142b8c130ed6e87efeda9383af0d19022b8d9fffba7c251a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/TCJPA2493102.
AINEED (feat. Neneruneru (CV:ICHIGORINAHAMU), Kanou Hikari & ICHIGORINAHAMU)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb299ba75de0e94d7222187f73eeb6ae9d76520ede1a1248af005c43ddf5534. 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/TCJPB2487668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ec562f9ca15ae7c74052c602e464a3d3dbeeb52411496cfcae59793b9f6253. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/TCJPB2487672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c2691e747133b2d50186de2f6508667e8e11ff5009d6a14a0399c75bf949fd. 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/TCJPB2444427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f75fd6c545afe72664f5e88e0b9658438f6a9d53539021b647ad30fcbad5ce. 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/TCJPB2444430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d7c0c82fdfe3d556a172dd13b7629cabccc7fa639c2a06b526e28c37653481. 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/TCJPA2419700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf5e145fe78676d4c0158e89280b5ce90f7f1006bb62efb3e141dcc0daef77b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCJPA2419706.
Yggdranium (feat. Neneruneru (CV:ICHIGORINAHAMU), Kanou Hikari, Yanami Rain & ICHIGORINAHAMU)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e33cb7e8bb3246967b32fec3df6989d5047b49d80d4c9c00bd0ced2f82fb3ef. 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/TCJPD2598435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352c72863df2d40894328472bd05e973ed3631b5c10e11839f7258b0858b486b. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/TCJPD2598438.
drive me crazy (feat. KOTONOHOUSE, Neneruneru (CV:ICHIGORINAHAMU), Kanou Hikari, Yanami Rain & ICHIGORINAHAMU)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9625d1413b1f559f84d1df1053926699a2775fcc674c83d77b5350766a2fa2. 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/TCJPD2545154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58209e92816bf032accee0ad5337c6c862b142e360c84c8a76273a0ad9035148. 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/TCJPD2545156.
Nonfiction (feat. Neneruneru (CV:ICHIGORINAHAMU) & ICHIGORINAHAMU)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a295c05c4c6029e4c103170e33d2adf99579598b4dde57437e3ce96047932bd. 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/TCJPC2468814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56d8e099fa9b5445082f48f8a64d3f4aa4c4e7f72a83e9c056d7156ac0dc18c. 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/TCJPC2468817.