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 0x3c5c70542058783975e665a2e68629840e76110bbf2cc508514c5802ee19e316. 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/b8cf540e-ce05-41bb-8d52-33169ee40bc7.json and https://artists.proofprofile.net/proofs/artist/b8cf540e-ce05-41bb-8d52-33169ee40bc7.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 0x1acc5b4f9a43f76751fb70034ccb625da1c76c21981d360a1c92f4ff71cff7aa. 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/QZFZ32453823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9147bcb0968c0f052b7579e6bb2116fcc034e88a69138ff9b805e34856ae9b71. 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/QZFZ32453824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b51c1726a21c455db9b7c5d8d95c61e51d7b494260a1b3b7d25323fb5f7c9e. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZFZ32453828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b152097313b918a981cd58cd10408e910bcbc075824e4bf8385c6d9343b8ba3. 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/QZPLS2332857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d76bc904de625b7f983f96df745b12dfe6bda867b3eb9a69844aca3c674bc5. 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/QZNWX2371325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b1877947670ab67f7aad886fee3043087e54da0ebcada710b025cc0dc3dc1f. 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/QZMER2381685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75a546a54a95fd69540331074e2e87dafabc8b13882935090be8a144f16130e. 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/QZMER2381689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d01693ca028962ab47b68a0f6814340f112b70d7416f8c49b03c3c840610851. 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/QZDA62339005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e11c5057ee3e614643ce35656349b32174009dfe5db11a19aba401da749404. 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/QZNWZ2219399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afbb2a272313cda074fd7825d834b5bd2de0704368bbee846b4e5ae60e3f4e1. 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/QZNWZ2219400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7583e085c2e8220e806c3bfc527cf2a53b7342fbd60a96b68f96b24e19ca6f8b. 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/QZNWZ2219405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b82c7850cc4d9d4004027574e8d3f654f4d227e1dd9b837f3b2050e66ac5de. 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/QZDA52218475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff1f017c8d363869d1bcee82d904702a2a136e144048241ee955f5307845fb51. 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/QZDA52218478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d363c89fcc4a4abc6524d7a95900db2995b553d8036eaf390e5ac0a4b6cfea. 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/QZDA52218481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd072af93a93feaff615a7f5e08bb98ac012f7a19668f504c6072395a41f7e35e. 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/QZFYX2218547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec239e80caeb7a21ae63cf0d762bbe75efe23d88d0e69644dd3cb5eea89c194. 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/QZFYX2218548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdcd9f3332a4d15ba0f2cd3ada42fd620b5a33d015a4c65856483786629d7e1. 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/QZFYX2218549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66de1c022db247c000a4d293f4ee9cbf76b284b02d0e69f0e72d9f96900f86d9. 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/QZFYX2218550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e95f7ce923f8089750f404ee0d3b4cc557d591c52627a462b78c68393a5334. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZFYX2218551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff08fe8f108570886c249d28574a2c66b37895d74e5d256bb1e0697ae02795a. 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/QZFYX2218553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36372b496ba0eacdd4ccca37cef58df1f3421a0ef35f0c8dba6e0d30a6b39c5c. 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/QZFYX2218556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6d55f0be6d1aa13b8beee42f5640a9a009f4fcf0c3e11e9136adc8fffdb91b. 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/QZNWX2165905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66746806881a990c53e019b9cdff3a852bd25e6d14fbbfd12db4c95123053577. 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/QZNWX2165906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a6962194c6b07986226251f7b58bfd607f0383c4b20e7bb2a73fd2c8e04789. 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/QZNWX2165907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70720b89e87bbaaeea787a4d7e1be0db83e63ffe3a968d01caf83d5f8ca4a5f4. 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/QZNWX2165910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49377836b702b9d7b0239e822058df98f5a2a26d6c68bb51b7da80fa02d38da5. 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/QZK6F2402084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01051974a7d6dbdbf2892bf7c3a89fe4e05b3f136b155ca8e746c8cfdb09b22c. 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/QZK6Q2412471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd42b2a0aa77c214abef8859f5ff86eb299df1cfb988012ac91edadcce7f17aa. 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/QZHN62435138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36eea319df613e17990adb177603ff99967f7035cc8dccc95c74519474589bf4. 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/QZDA82442901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b8aa163d72ac60324c342d048e1d27208843fffd395bb0e0ccedebd591df44. 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/QZNWW2396665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83c8d5f04c5f7090d3cda8a3734cffa3189c6aa03a0b4f7d4e222e6674cebd6. 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/QZMER2330001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8136539dc3b5e0413a7e78a6d62b908b72baadd74182c9f447093f0799192b2. 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/QZK6G2350952.