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 0xbad9b1b59c2a88d367f6618d58ae3cc802ff043d980777ef6f4f7fd65b9e87bc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edd2a219-1940-4290-8d9c-f921b971a89a.json and https://artists.proofprofile.net/proofs/artist/edd2a219-1940-4290-8d9c-f921b971a89a.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 0x18d0919031f8c6c5eb8d7050bbeefdf86e7abf367c46db9daba3da0fc9c72bf4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2276331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d07215ea11e7365d4cf6f4a1b1afab0fdbf294c6b1d55d377f5a98836cf1de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC4KR2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1043390d88fb2a032f8644c4659f799fe04c8aa565a82fc7b712c98fe32a19cc. 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/BK1E32500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5577b6ece3dc6901a42dee452ecba4b313e853121aff6d5e5f05a6139e2ce3bf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ41939338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c687991fdff4bed000002a71fdb2860994d763702effc28cc8013cad19f17c. 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/QZNJV2005296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992ad79d1a2227fd55faf63624c8d29229a385935df924003755162c2b69b2e8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC8PH2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd6a2be0bdb8408506a026e1f80fa988a2f25d1ef372f67657c2cd3cb5c28b0. 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/BC8PH2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7bd72323bd6643fa9da5f9780b8ff1c004d59da3f12fb567203e20755fb047. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJV2376110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938c1ebc0da00e31dd3c7cdee92fe62e485781f0ff8e0bfb2ad609f321f7e321. 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/BXIV82155799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a64cfe7f081a718ea63e438170704d3a824fe451d50acd318cc8be5b00b9a59. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHZ32077691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5cdc45ca3017079a453703126ec92a94670100fd1cb6234cb582a78ea11373. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ32077692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5fc8b89095d06030dc0be8a0d410047126244f11610b1031a13a78aa8ba1d4. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ32077693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0485c1db4ac75ca42f22c0f0de5c20583e037edaee832ef28d0237e6b7dd19. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHZ32077694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf41f2125aed07b67e94a84d634501227d1bbdb5fe4a20b01c8a22f1fcdb1d2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2071384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01490fb3dc583e33d410aaf7ed7c72166192c45b5580ce89449759ed8d2e108c. 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/BX5M82500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01b71d11ee1301f293cf9203a347ec473c67f03e90026b49aea6730180e77ff. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXIKW2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb01b71d11ee1301f293cf9203a347ec473c67f03e90026b49aea6730180e77ff. 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/BXIKW2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052abf3f269ba57b4504ce3bac6964124c57a203343b8e04396f6eed974d4b1b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC8PH2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017cc320a0e1c3108b36dc2605c06990e42e715ed3e5a387ab3d8ee34130d63b. 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/BX5M81900030.
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