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 0xb891dffed42861655d7e2ca366a3b27caadd2d965a260448e6c23f4fe7bf47bb. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfbc78bd-6954-4ef7-96dd-8189c0be1ed3.json and https://artists.proofprofile.net/proofs/artist/cfbc78bd-6954-4ef7-96dd-8189c0be1ed3.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 0xcb6cc2d056168d66622f1dc88c69c75b256edb2824eb371e8c2292fc7a799c6e. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:03:56Z), 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/SE5752456134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e31eeff3f1af37b1248fd869d4469a647f41b5238e234e199ba4bc047fb09f3. 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/SE6HN2432234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1840976fe26c247aef180dc435c82142b9b12516edd37d1f964649cb011fc070. 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/SE6HN2432235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd99ec94da1cfb1cb33deb7cf553cc9bb6f5a0d6d8a65557ea87181fbc1f61f. 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/SE6QE2430325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7610e27485e24bca63219f9ad1b9a46549e46ef3aa323337c848a19c60e457ab. 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/ES75E2400448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe641529854e59f062cf8a196f1c7e37f4ec71b4c8e32df92f5f6bbc1d477b601. 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/GX8KD2237969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec2a029409ca556009c25cc0abad084e6828675c25b141466578af0cca2cae8. 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/SE6QE2458105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d0653afca58f32d62969bc5757ff0a323fa9a6b54b95c754802ab1187cbe4e. 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/ES75E2406877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06afb5af13add73f4330f386dcc0286c90dcf0dec4bc128f90b5a860636e2399. 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/ES75E2308299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff5ed914e74901648a19df187cb604826a362e6803fcfde5991eb7ac0296a01. 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/QZW9K2361290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf844f14ed0f6f68b4c07406975d60fc7d8beec7daca9819750ced8e9945c0c0c. 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/ES75E2308300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4664fecfa0eaf40ff47d9a490c411e943184d3df332f6db8e6a00cef760dcfdb. 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/USY242415678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b0a227f5da8d0dc048a5cf7f39c4dbcfed99d92a2b90f1e1fe3a691bc9a077. 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/USY242415679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cbd2dbdfa4e7d43abcbb3d00359d3c1c7c4ce279d33da7dcc80f1b98701e32. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES75E2414823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a889396272ba06d34b0dadedf51c77c67d5949cfae9ff67fd5992bce705c87. 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/ES75E2414824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487ccb0418d08f90a0a130e46b11a7591fba0997525db9b121ffd1fe8cafd4f6. 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/ES75E2414826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd99ec94da1cfb1cb33deb7cf553cc9bb6f5a0d6d8a65557ea87181fbc1f61f. 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/SE6QE2430325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c161d7c8beb24d6a2f142088427bcb7a6a6802500a0dd091a1282aba735003d. 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/ES75E2414827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cecf3977f56537bc224a1be7ff52f5a6af7f1055af644dbe9f9703cde39c26. 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/ES75E2414828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e89dc38bde669cdb2c3414057aa200d06204355c5c8dc18dced509311659d8. 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/ES75E2414829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4d3ad7bc60afed62b8a8bc6bca78d9d9504a9ec96fbe1f9fe0d9143f939682. 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/ES75E2414830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28844ab132488d0aaf3009b9940fd206fdb6395615c13e811f77affc591fc3d. 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/ES75E2503897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4924c81a8c506c09097e50bb51ec1ef226b5eeb6005ccbc3224bdb858111ae7. 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/SE5BU2514555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358706d7be27b4877ce8f46641467e012936744e5aa9e63358583da7ea27ae36. 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/SE5BU2514556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f8730e407812276f9775d10f1c880cafd407719f8eb2f87077fe44edf02f27. 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/SE6SA2420382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52527880cb1ec64f2e8b35cffc8277570d6ac45cd751be79587236a6557368b. 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/SE5BU2514557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd944d90f4c59d592c5931e242b35d49078df8b1f485d14b1c9d0df7d08b9d481. 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/SE5BU2514558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198d130a449ed840839bd83b411633bed0b691ba9419ae1bc7839c6c2f2f3204. 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/SE5BU2514559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7943675f3e21f3e9d5b052960a9623ab45f8baa91d019517e27ffc1773063ef. 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/USHM82510650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959bc9327f2a8ed3c4bb4b8a9ee7f523c8ed6544dc052745f23c3d53e64e9d4a. 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/QZNJY2477171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0500b690cd3e286b0dfee393756d4b88ad6658cd1ad40d49a737d95182ab77ff. 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/QZGLM2478689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931d109d424e1ac670ca44680dbd0af6f6b8da23663ce25741f54d0df19f94d2. 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/QZPLS2599049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7662be8892af441619e601223bcbb9bc67971d039aa094a0399ece88c5d62b99. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZHN92423414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c9a14e12cbc834e87525f55badb12a440538acd96c71ee7bf61ffe69dfcc3d. 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/QZWFQ2305594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0005deaf178bbd3c4fdbad633c735bf1a9db0124ffab22ecdcd58fa3fc1e466. 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/SE6XW2400059.