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 0x7d7865b99565b05b5484eac5846d335e67f418fc714da3ed55fb049da6357bfb. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d9c389f-8987-4c87-b4ec-7e4183f7e0b8.json and https://artists.proofprofile.net/proofs/artist/1d9c389f-8987-4c87-b4ec-7e4183f7e0b8.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 0xa3d2f0f54ea240040109216f4af4f81ebdf2d8fb99ede42e8fe7d46cb160d5c9. 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/JPC201100094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f29adb7d81ec142bee42125f3b9d9fd088b75a6b82f63efac886f100781e747. 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/JPC201100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9c60d3f452ef629787e2cf89898b38859abd33512768df0f3ef27326877e17. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPC201100096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53668764916ddc8387bf30e317e79f25b926980d1d1ed71d1627006cf092697a. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JPC201100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7564d353dbb2152b1c422cc3b0287042f098e34f53ca532d7dea7492e3a3ea. 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/JPC201100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b14057474c9a72bd1e42448905478f67c0fd404c8d35a8b54ac125b5b243595. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JPC201100103.
Shallow Nights Blurry Moon (Shinstrumental)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db356199072851bef0b19c9681c5b8638c6969141eec746fc763d427f529516. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEEQ71809711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac724499dc70c273aca9306e30240508d849554a13e836f8761a320924d6020. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPC200600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c85bc57c11d7ee6e86e7b91e87e985d1cd445b33717bbd597f32aaad14bd28. 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/JPC200600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9060f2063457ae7115b30adf26dd3a2514ed97f7370dcedd2dc94d07b694dc. 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/JPC200600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeb822d3d2b219be42f62fcabeac4f31d29603c16c2f08289ce42771c1e7651. 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/JPC200600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d87defb877e7afa50ebc7236beed75f4e7c2ff2cd06f611a4df7d5adaf6cb5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPC200600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad2b0d8cda422415468c35aeddc7d9bb9637857c1949ff4f313b84fdbd9b655. 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/JPC200600024.