thumb|upright=1.5|Tanks and mechanised infantry of the 24th Panzer Division advancing through Ukraine, June 1942, typifying fast-moving combined arms forces of classic blitzkrieg Blitzkrieg (Lightnin
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 0x63a5e01c1657d3125d998045431844a6cf433f61406a8006aef2d32d9f9a22b4. Chain 2 (Bitcoin): anchored in block 953773 (2026-06-15T10:40:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cae0c643-58cf-4b7e-bc17-756dca6ba9ef.json and https://artists.proofprofile.net/proofs/artist/cae0c643-58cf-4b7e-bc17-756dca6ba9ef.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 0x2e05944c48df0b30a1af3a788f5f5951f0ec4e6278193bbd540eda4be1ed2ab2. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DKQ4A1936601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e0aec3cd6f33a4ca1ae630292c27e287a2673e7bdd3d8c2adab1a6ea73dbbf. 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/DKQ4A1936605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717e9e60877196f110a0faa687768ff0d361df2ea14a43f3d15c8ad886405e23. 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/DKQ4A1936606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4070a8e5c4beb63d30370f55b2926c52070530f9fab3df10a05577e5a123d6. 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/DKQ4A1723101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8fa823d7ca08639a31eabf99fdca7d1d6aff8a7a1880e37eb738641b88e1e7. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DKQ4A1723102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf011c33e80533f6397c0f8e206f947aae145e676895fa58be3b77ca99c2946dd. 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/DKQ4A1723103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e15861c789518fdcf99e07b800d5de81723baadad486dac4506c2f07d9f0901. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/DKQ4A1723104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebf40b3719cfa71d49a4c3da7eb43e25920aef01cf57763e9f4565846a31d20. 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/DKQ4A1723105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccbf1116fbf1bf32da9b30840529d55440884f4bad3458515a06f4ba68de6d6. 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/DKQ4A1723106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff212c02c58b1b8d8e1fe7c7b4297cbd38e6c9e8881198ffb4e5988031072388. 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/DKQ4A1723107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93580af54410f8b63d7778e2ccb13a81ec305febaa9870d487a6995727ded5b0. 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/DKQ4A1723108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66f7f3a7220fcd5c345f8e063ccdb4fa817437e5058367c97e9310a6729f61c. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DKQ4A1723109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd570e7964246300d945b5a6e13363bc6d56ade4c12986df821da2b50a1191a31. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DKQ4A2102101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edfe11c0bc31707273f229f2be44d94f5e4e61a8225075d59a3dba990147df7. 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/DKQ4A2102102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd521b8dc59c48deda04fb9cda74ec00fde7abc743381444269dc273a73aeac. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DKQ4A2102104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac3458226d5ab99a0796f0a6727157c8dedbc5127442df2af9dee693a91b23c. 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/DKQ4A2102103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73905b891e9924535fb7a79c06c7ccfbdffc52e9b2511b98c2227aee08a51b1. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DKQ4A2102106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0881bff45c23c657e5712987feaf123323e1ef4d605ea87a04fa185b6f74c3cb. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DKQ4A2102107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cc057c35526ef46d18bd8b8f7c9249dc18dc1aad4f0cbfa55f49c51307b1b5a. 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/DKQ4A2102108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf3fb829c3165cfb2d019089514eec64b42b4dcf60acbeb4b2d248efab1d930. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DKQ4A2102109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41bef36f364c9edafdc9620b02517af6a175f9f59143d24e4d794956c92f1b62. 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/DKQ4A2102111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3224eafd5d003e6595f40120ef3d12d253b0f105a852003e80cf4e56273a019. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DKQ4A2102112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4199d5794a4c72cec19126e3fd4fa24d2176ce7d88614475b288362a6c2ab2c. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GB5KW1702114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b4cca18ba27805a272358a9911c4bcc551c8e8d683b1117c8f97a09b24cf85. 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/GB5KW1702115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac3bb1e5ce98c9b17519fb4ad3e2f74e318a6ccbe33beac9792542a78037b96. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GB5KW1702116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be684ebdf946a881f35a859a8e3d87304b7fb42c6617081b4c19f94145cb088. 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/GB5KW1702117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6137fcf564df5bfc3bf1f61876af266d204709eb8e5c3095580773b16fa465. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GB5KW1702118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4b55d9263e16557487d4bb8712ad5b8f35d5700a84b0e7128e66ca0c5e31a5. 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/GB5KW1702119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf832c04ffb3bc8e57372f9777a1b64e1f67ced1b56f711c1a5eec62b04ca6225. 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/GB5KW1702120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc98cf9f2ef96a61f25339b28e3b8adc2c51f9c39ec632b724e5432084c3f925. 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/GB5KW1702121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1c65391cda1203dd3fd7b21b8b699f80a73dd7f51afe7329307719ba4fafbf. 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/GB5KW1702122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7fe87a9aafff9dc1ec6141daac2b8b0756666aa7005518909619c990680f06. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GB5KW1702123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffbebaf06a2902aeb40512b6e0a042eb46f9d6aaa0c5c8e06a1d9175fe4dfa6. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GB5KW1702124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880a95af141185ed2de35f76b6749bbb5e9f7182cea7cb8f7154b1ccb17b95b2. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DKQ4A2300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e77da411a490171d31b1805361af1b8290c187eee0649497cf5cc5493db9275. 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/DKQ4A2201301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebf40b3719cfa71d49a4c3da7eb43e25920aef01cf57763e9f4565846a31d20. 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/DKQ4A1723105.