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 0x246b5c21a42df813a31de578e450d33afb8bfb70807216b383b2fec054ec656f. 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/281c328b-3d02-415a-9661-1840ff94feda.json and https://artists.proofprofile.net/proofs/artist/281c328b-3d02-415a-9661-1840ff94feda.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 0x45758cebc45431aa260a67c41a06b5decd5f5e74d821e512ed4250efd1e276fe. 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/AUXN22320752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a38ce52821507784e32072c27d5e121d07ae87a02b73173107dd6a3a36b35ac. 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/AUXN22320754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633728c0487777c70e85e91c851bacd70f849699750963d9b58312efe7edddfb. 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/AUXN22320755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d252bc32d58db5ed20a54935d4d6586208b5c7a358c2fc82d08b57b94c18dae. 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/AUXN22320756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2329cfd0bd39fecd463aace12378644c06f8e0c5a090f4ff001ed551f83868. 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/AUXN22320757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8361ebd48186162c688bc5b844a68affc5d0c930ba277d3db5cf233352fac6a5. 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/AUXN22320758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4635c2c02a6c69e8fb2e485cf059cc697c4eac65bed98761fa81b83a8103dc59. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/AUXN22320759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20241c26d549d8f7ea625e5ab5365f68fdd7b5d1c94199fee2942ffaff24c55a. 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/AUXN22320760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56866d197e0861467cc01ea5437fb08dea95ae4894bb6cb46dfee7446c1454d. 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/AUXN22320761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2163527d76afde561bcdd970b3d5e267a6d19769923d80f8c5e70ade29dab4b. 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/AUXN22320762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafde0bbe26a53c9882dfd9cd2c197d0a3eb679e15dce5c210c44d27bf6f3f56. 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/AUXN22320763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b20f5b6442c2bba26814e2de4725b19f91123781699f12985846cf80c52a48. 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/AUXN22320764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54232912234b7061d4a9d05df83068750eea314b1ab87cccbce6edd6e910b6c5. 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/AUXN22320765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1227ed65ffc0a60644ce3b9a44f3f721233db5434edd46b7ca47f2bfaf1d27. 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/AUXN22320767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64035e57bbc6c8bd678ca821c6069c276ee9e807a6143118e8e69f37656a6a1a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/AUXN22320753.
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 0xc8ff3e75e088f87bceb943f80661ae0933e913e2b2bdabb3723bbb52a9a25abf. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/AUXN22320766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1e5895903a6eb7095b452f5b6b32a55939fed04060e577a111cec5dc257f69. 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/AUXN22320737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bd05b9e16da374d14697ae243ebadced12106e87907ce75ce0dcb22a45bbf1. 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/AUXN22320738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c3a9d1e3092d18bf501808acc7a3f61153baf3e15a4d54f7f4d0c16137ecd3. 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/AUXN22320739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2a673b851a439113ebec4c7ef50b921a14be722a93d1a9a6a0f0a36eecd76f. 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/AUXN22320740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99158d1dbeebf0f1192001af1e8eb90f7821f361c94a617cb3ab3f81edfebb0. 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/AUXN22320741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe0696d7176af00eaef7dc594167358ad554c1fa5f1a48333c333092a1e816c. 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/AUXN22320742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509d8675aa8497067c409b4ccfcfe0e72445a8c2d973398e4d7904d192925c1a. 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/AUXN22320743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f2613db9cc00fa9603288919ad4daa0fb05de3b7bff31963edc1cab6b76190. 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/AUXN22320745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9545bef3cc106829599137c747a3885a4483f85da4c8cf4dd71e527030e4250a. 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/AUXN22320746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa85e27049d133f6f4e870acbe41d08a7166a629f312b06c2b10694fd2af166f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/AUXN22320747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa0398c8d613d7b70db535922b54690bf0a2d2f1efba1646b9958c058f6f8b6. 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/AUXN22320748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac174f634569ad8b04dd960a1beec2d50a6e9d4a9b68326eb3f32541cb5bfa1c. 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/AUXN22320749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023b334f32bfbfb79c1210934010f0403b2ec390a8ee2070054dc46dc4d196e6. 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/AUXN22320750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd50b6b2567be4b46dc4b8e3ff90ca4967c5eaff27232ed61d0e12b4aa5a45d8. 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/AUXN22320751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d849e278390eda0be3aec37b0eb546a8200e95c150a236db63467894d98dff. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:00:56Z), 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/AUXN22320736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2eeaef879a5c73291dde683a8b0ad5fb9f3719b49cf9bc043a71cb7ba7f6dd. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/AUXN22320744.