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 0x41e202c7b331ba9417eaafba336202e3f0bf69521bf23226f95c588713ef36fd. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33d0c980-35d7-4b32-9140-47bd9d08b324.json and https://artists.proofprofile.net/proofs/artist/33d0c980-35d7-4b32-9140-47bd9d08b324.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 0x023d816681465423a46b850e98cab8d814c915f6403f7ed2e6f8fda65c97a26a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPW792221447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc003ac2798d21762fe52c1a1baa87be04eb573cc3cd7f1a2c7430bb29af9ad3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPW792138896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd420463dbb09c0f97a558a9f6923e5c03db815c9ac6225b8f004223a2ecec9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPW792232546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c4740ab91b788e4fcedafe5853dc2818caf0a370c6456436619cec0d323bbc. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPW792010229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25415c899da486e00f2f4cfb3491c49e6d3f8ff7dbf9fb46d0e916532ce66ef. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPW792010470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07e04af7e3881bbbe8af93185670cfd881476163db1056f14c426a6fc5ad464. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPW792017504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b245cb846c2e9042603bb5f289a111bd7646f6922a1aa1e32dc3102f259b234. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPW792100692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d8cd1745c14e3aa9f4afb7473adbec2ae93d19ed0aed5175accc48f3ae369f. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/JPW792303411.
Various Music Collection Vol.3 -Selected & Music-Published by Audiostock-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734df82ce22314fc71fa6e99b133e3da897de1f02431d743bf04f200506d8ea9. 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/JPW792240502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c4740ab91b788e4fcedafe5853dc2818caf0a370c6456436619cec0d323bbc. 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/JPW792010229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05edb6f5c00652fd4bd3aa2f999bc7c20b7c4e39f6f67ada7e22247d84a0997. 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/JPW792003411.
和風のリラックスBGM -箏や尺八、篠笛などの日本の伝統的な-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1897b3cde87f756f0a5352c06b595fe82bd26ecbd91a1f5afb4ab1bd0b62c5. 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/JPW792003398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05edb6f5c00652fd4bd3aa2f999bc7c20b7c4e39f6f67ada7e22247d84a0997. 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/JPW792003411.
和風のリラックスBGM 4 -箏や尺八、篠笛などの日本の伝統的な-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e33dc662ab0cf184f4fe753b92dbfa1bc5c930e227c8f7e7fb7c0fddb9bf189. 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/JPW792012167.
和風のリラックスBGM 9 -箏や尺八、篠笛などの日本の伝統的な-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc003ac2798d21762fe52c1a1baa87be04eb573cc3cd7f1a2c7430bb29af9ad3. 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/JPW792138896.
和風 Vol.21 -Instrumental BGM- by Audiostock
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07e04af7e3881bbbe8af93185670cfd881476163db1056f14c426a6fc5ad464. 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/JPW792017504.