A reprisal is a limited and deliberate violation of international law to punish another sovereign state that has already broken them.Karl Josef Partsch: Self-Preservation. EPIL IV (2000), pages 380-38
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 0xac1c5b6953fc58c15834084771a4f808beb3a56a5963c41239a5480430c04594. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0da10b5-2822-4e85-91cd-6db27c72e78e.json and https://artists.proofprofile.net/proofs/artist/d0da10b5-2822-4e85-91cd-6db27c72e78e.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 0x87de475774de52dc0292ac9619c1c8f99f0357c3e7355a56060ca310cf85ad34. 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/DEAF71104380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe3a765e36d2f04b9ccee364640f776f6f5b4422c13fe68ecbef295ccff01a4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEAF71104381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bcd4dc2ff5719ab9cbfe2d4808a571b33c2e514b64f64323ff7a4701948238. 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/DEAF71104383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e73f17cbe8cfb16a01229195ee2cfc46b794a54c06dda9b4220bf103e7f8e35. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/DEAF71104387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6e1f87d969d6733756e758b41cccc48f5997a1af28fe66363e018034d1bbc0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEAF71104375.
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 0x365f9fff780d541c99fdbac1e3a98cd8f14f0568f8a474c17f514aa8e533ab32. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEAF71104376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19894b8708368db79e38b7ccfe6e139f265c86cb2d913245a29be7170bd41544. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/DEAF71104377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea62143425973dad70ef937cae3cad05b31049ac6446bd56f0f2a8e93378248. 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/DEAF71104378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a44b49559afd89c88be8d3790f64e6f91dc309edd93ca2b2deed786b69a667. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEAF71104379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d8a97a638df94d3815bce38959124e02b8a850708f975aa1759741c59e6e0b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEAF71104382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac5b446bd6600fb1a6a5c0277fc921f286d3ea3d6493738ca303a81ac6f4c97. 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/DEAF71104384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4efa01366a8deaef07681a8c4833572663c12b481c78bf2b63a547a7f64349. 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/DEAF71106578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4df938c80c541368b24a225d1415cdb0a5cd72b62b38d9b97b8120eba69711. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:58:15Z), 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/DEAF71106581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7feed96ff0a17b11f7072e00ae37c111dce78fb4176293d30484c7173bdc999. 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/DEAF71106583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cc9ceaf151350a268674d200dfd48cf01fc4ba71cf20b292b0365faf7e0f4b. 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/DEAF71106585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca6dbd3bbd6e9b457003d573d7250a16925911d33af4c9eaa5c98afb4a8e086. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEAF71106579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede1310fd7a162a5d9534672aafb1e28c27437d18e0266d0b721a76472a25dcb. 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/DEAF71106580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b7300a796503124d0272d4b3937e6b6be15856f76ad8beab082e46e752d1d1. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEAF71106582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe765609f829b38082b323bb9f821340f5de52e7e3606707efd0758746b06ee1. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEAF71106584.