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 0x0eb84b92df2b44e067aee086355bce8e7f9db9177862c8e75c85d2e960a35d9b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58a47872-76d9-4054-8d9f-07d3cd5f7305.json and https://artists.proofprofile.net/proofs/artist/58a47872-76d9-4054-8d9f-07d3cd5f7305.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 0x794d39903b9b7e8c3fb91efebd36758ee64b1576e8cb4c8c791f1b022ec4dc27. 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/ITV261700222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9013e105662c4e5d58da7110f30436ed80f086a15917e62d1a47c4e09649b3d9. 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/ITV261700224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca9c313a421fe7d2ea0a309c30b32bd01cefd19c6dcb0888a146b384cbfd7ad. 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/ITV261700226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab5af73889ba59c77e7911b403ffef924d14635a59e9ebe578ee827dffea5e6. 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/ITV261700227.
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 0xda27879aaef1ae85a3a3658a30a349c8ce45d3d8ebd23f86ad591052c3e69748. 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/ITV261500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516b9419634e7e090fd102b4433cc8bbcbab18e351b16addf07c5199cbb7ac20. 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/ITBHZ1501042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646af9d17757dc3178df6470f80f7ae41d0b9d20d39577ebdb0b4b294c1872b0. 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/ITBHZ1501044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5bfd947f0733a13188522e3a9835990a0265fccf89ff7e037c1d5de4900aaa. 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/GBKQU2459550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2789f83b6c29502e01d539412f19f282ef60871e16c6e719b735c3313c8b40. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBKQU2459549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a62cb249a9ede7e64f8e4c0faad4fa5f30e961da64a1c9a0a4245ba7d6aa845. 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/GBKQU2459551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf487b10b0ce7709230b222cc0a9c8a02f11c6662b3466c294d82267cceea8ee5. 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/ES94G2444003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7b3972c845f6c6a1acc61808c67f6f282e6989c59df845e455471815e4489b. 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/ES94G2444004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac34a1b689fb98e12caee17e3a09d878fce2159e5755b476f7dcf6a272fcc75. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXG9S2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1206ef26acb7dc22683e661fc232d5c8504ff055ffe67872724f63dfd14ad30c. 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/BXG9S2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbf2b73332e1bcad63560b11cd6d7d8714e9bac1284794bbfbfdbd965d862e3. 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/ITBHZ1501003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039a284952d16ba940164cb2f83d18db492fcfa062ef62044388b14e9d662fee. 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/GBLV62318751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7601cf2926d5537e73e494830280275e9d6de0a49d0b101e05fcfb36ea40e9e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBLV62318752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89feeeea517732d45f3c69cd15f2be7118d58a86758bd9126a7562c2097ce614. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:15:05Z), 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/GBKQU2392709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc921ca2fe003424ed853f019095ef817ceb25d4ecaf5a297bf1ea3e048b7bfbb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2357776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3067e11ad177d0b2e4e617f6b70693bb1cb0b2cff94c7cd93bd21345cc8c518e. 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/ITBHZ1500883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37451c1e0165db629049ff4798d49b17822b0b97ce267dfc802a947fe846f229. 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/ITBHZ1500884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4935099f0d324cd578424c902cfa22f4363acf6ccb89d16bc7885c41574390dc. 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/GBJAJ2200699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4645a0022ef911523c372bf5a9d31e098078ac059a6ae1bbd1d19d13c10da29e. 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/GBKQU2232583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefcf88ca839c180d749a7799ab946b30e3e345b06eb2f9894896da0669892cf. 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/GBLV62128493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf663d2daccbca9381aa64e3fa1cd5721e192576d899cd2e4aa6a07d5e9e749d4. 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/CA5KR2069730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131809d1df6f37e269dd8714619dfca1c59dde05834c042a85f4c9da51385fac. 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/CA5KR2069731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecd997a395eb496fd80868365569fa5af55f79498deb7828acd1a843cb1288b. 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/DEH742004386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa635675d96da4cbaa4ebe07846ada5871f589aae49f48a1fa46252f50ca5df63. 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/ITV261900732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca0a01b72558ec97cc6c4462d339c30a34ef8bc3edab7862a4f5cf4acd89bbd. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ITV261900733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb7a2702f61d917ea0b6db6ce5ffd9e88b0f839413dbd0dd0e2f8f30fe3fd54. 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/GBKQU1942267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc591cf4f7bb91622521eeeb360592f9a94e8c354df2545a783ab445bb9108214. 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/DEH741903163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec45a1d5cfbbfa5ade0884c13701a5626d422e3644d00671bbadbbb5be2aa6b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEH741903164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074931be712addf26c8f9decb5dac13b3f92b4d2a75c1400d0546a3d872b4ff8. 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/GBPQS1900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6238619ef9094b8f649d507aaf28bf72096cb04316be92da09cf986cd0783589. 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/GBUM72311281.