Attila ( or ; c. 406 – 453), frequently called Attila the Hun, was the ruler of the Huns from 434 until his death in early 453. He was also the leader of an empire consisting of Huns, Ostrogoths, Al
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 0x58f497ad1d032e1ba798eb309370029809e1ce3599fa53470c37b25e5a8348ca. 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/393e1512-20e3-40b6-a91a-6061d06a652a.json and https://artists.proofprofile.net/proofs/artist/393e1512-20e3-40b6-a91a-6061d06a652a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x0453922550f84ed40b06718e31de6d1b402e054bf0859944e3a0794c7251c37f. 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/ITRWL1700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccffd340060186614c4acfb8f6a8e43f9859a0b177e4cf4cb36b64d902cf93cb. 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/ITOGB2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b739c4c49e8fa207fe46092e3693d256a4bdf3915fc7cfdf9b5ec86f7b67ea. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/ITOGB2300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4526a8ab1f74e84dc3b7ac17a1200f3bbe0952e6e86124646a47d6623df1e29e. 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/ITOGB2300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd39062faf475bcb6a34783c3a923dda57e26440ee4f99ad26cedc10f0790af3. 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/ITOGB2300040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7484e47fe4d443b9e49df331b29990402d5b89f3fbfbe6d9ec426b4a904fa9ba. 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/ITOGB2300041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd6f2b81e323e290841163957432809778eead0285d1763aedb52595e365e8a8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITOGB2300042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5ff9527d4779aa74f3c69473e2cb2b76504a385ce548fbe12442290bc45941. 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/ITOGB2300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf216454f4e331e362ede13e1f88a60b23d98f0825ecc47cc73437760891ee721. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/ITOGB2300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7605ff16944ef16063222427f0315d2e3feacd2cd770a1dc31d834d2026129. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITOGB2300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ea967173ac03da1f3b463bf3d84b884e691cb8bce019f200975fe44f47ba81. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ITOGB2300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc3867c216bcb68811ccb27ef46f26d790ed8b3267e5ff97078d0edc5337bac. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ITOGB2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36b87f5d7fd8b3a68955c6d3ff717dcbc46ef85e94ac8f583cf370f84a63b1b. 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/ITOGB2300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aff0548d83649f9698b6fe8b1737d5e5f91e5ee6b5350a8a255114e009db9e. 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/ITOBG1600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcd36aadfcfcb455224dfd64c541fd88c91e7029210ed1fdc51991bc7e93822. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DEAR41771956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe588fac807f429220b82131bb65ddac243dbb4f7eb6054883890c284a8d2face. 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/FR9W12128849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269097b751a35b605f73d38209a1432f472a3b3ac158985ecb4b217ab82e2a95. 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/ITQ001800659.