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 0x2af44fea5eea334a061a9bb0555096bdfc46dc5620861db81a34911bf2794319. 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/c68e1d68-6f41-465e-9291-06439bb2d22a.json and https://artists.proofprofile.net/proofs/artist/c68e1d68-6f41-465e-9291-06439bb2d22a.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 0xab594ab86f68600164c2dab6e4d118c2b292b79641b7b2581b6d1d2a1ceda0cb. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN72574574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f08cc2f910a486ae9b90a8d8fc8508f8eaa422d20a77c1d3539b0444ed232a. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QZK6J2411814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7032b9cdd23b3a28987c70d0c19640106a31b61d728d71151e3896db7dd65c5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZZ782408000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120517e8c1bb3920bb40f9cb12cfda6b4cde61fbbfb563737f4629114e67ad9d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT3EY2429335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4408984ddaeb47e521a632e7def0983b526b59cb76d34a332ccfe1e04b9918f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYY2518107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc09e8495fc41cb3b4122423491b3e6a0924ffe7a2e1fb25fdd338c6906bf52. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAJE2596533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5bd665bad7dee15227b71f4b33f0f360a660063d5a97dad3881dbf63b29c7d. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZDA62564167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39402569a215924a6f4f2f578c697efd02a0ffc060be7d7b3602ecb8093f2af1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA72584587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7032b9cdd23b3a28987c70d0c19640106a31b61d728d71151e3896db7dd65c5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ782408000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e8aa86b99011086e381e25556b32fe7e7aa3f8168fe1c9360c616fcac6324e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZDFP1959500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323626cc0fbfb00fdc4f0001841935b0b417eb9f815840d32b91f149716acdb2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN42527271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96f72722c23c918d8a878f63e0c81525a3a3f7bcf4aa41049fc7ab9ccc4b844. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAIS2469155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab5b18c6f63e53cdd08e21d949ed61e2f9eff6c7a702bcdfa23ef9ed4246539. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/TCAJK2530748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab5b18c6f63e53cdd08e21d949ed61e2f9eff6c7a702bcdfa23ef9ed4246539. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T00:53:33Z), 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/TCAJK2530748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab5b18c6f63e53cdd08e21d949ed61e2f9eff6c7a702bcdfa23ef9ed4246539. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/TCAJK2530748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4198c677f9c1dba40b422540144a0808adbfc1a67ca53bce85a46af4c05e1b15. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFM2494125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa72b5975e0c050d99de6162761190c7e979985c272642323e5cc44c1acdec0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZDFP1925047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d33cadaa3bbfaf2b23a724796e1ec00feecb51333b6a641f9d5f90abc2a95a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWU2477903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ec7bf298abf0d6a652da682488105f93fc4d5b1845a6b30d29b8ef152f9fa2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB32311137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8000b33e1d3f479779708b7977b67af5fef2051585f264da969b8c5618a43aae. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZWFM2449007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db22ea27cca5180b77d556510c701e8b73c0252163cca794646283a7bc42a96. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAIX2440868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19013a17e0f92d9b4a3fe2a31cef091e49db11d7a85669d9158d9fe918f5848f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6F2476707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473074c8e369d3ba6560b0ba8e6e861c8e5a86376cb2fbd9d7dde08461aced4a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJJ2551619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7032b9cdd23b3a28987c70d0c19640106a31b61d728d71151e3896db7dd65c5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ782408000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9223ae13dd73e5212eeff6698be5f979d71b62ddb228e19734e620c72359bd81. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6F2476709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbee488c89dcbc513b02960ede39ae6cd56fd67b681534be7c90b81eedd043f5. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZNWU2529352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7032b9cdd23b3a28987c70d0c19640106a31b61d728d71151e3896db7dd65c5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZZ782408000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96f72722c23c918d8a878f63e0c81525a3a3f7bcf4aa41049fc7ab9ccc4b844. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/TCAIS2469155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefced38d3ca63fc089dbb534271010680eb9c60be288fae9085ea5ee173ed260. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWU2529354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9223ae13dd73e5212eeff6698be5f979d71b62ddb228e19734e620c72359bd81. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6F2476709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab5b18c6f63e53cdd08e21d949ed61e2f9eff6c7a702bcdfa23ef9ed4246539. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TCAJK2530748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355634b1abcf37173a023a7b9b3685b0c5b610b2edff63577e554406ede27716. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAIX2413155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050eb57923b8ff29d81c2f138f661e38a4c21eb77ec8e87212998c9c1095affa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN72497455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa72b5975e0c050d99de6162761190c7e979985c272642323e5cc44c1acdec0. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZDFP1925047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473074c8e369d3ba6560b0ba8e6e861c8e5a86376cb2fbd9d7dde08461aced4a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJJ2551619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab9c18056bdbf4e0850c0a2451a9fae3254d0752d163458d047f638a7dd3b75. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB92521546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a7f02cf22a41205fa33c9b2ece8c736e64a0105a3487385ccf12f89af6a238. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWFH2537003.