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 0x30e83bfc50527e0504511a57a11e88ef3d064b6300936de061f935ff55806cb8. 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/92889c47-1858-4e26-b89d-35e2093c2dbb.json and https://artists.proofprofile.net/proofs/artist/92889c47-1858-4e26-b89d-35e2093c2dbb.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 0x74cad2d0347edcbee71af46d7506157a23ba4c2b0508849e11c6cdf97468b2a2. 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/QZMEM2069488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a24d9635e3a4cfe94a5a9e5fb0b56e143e3e25e3acb8f0e4876cd27288165a2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZK6L2003383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e349b2f1552b671cb0f818c104aca9a95d2505d1ddfb4ae75ed4f34297b0ee. 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/QZK6M2354432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60845e100d38fc82cd3261ac360890f3ebc4faaada7e17ad32f25c15835d22c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKZGC2304851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf554496c4534fc32c583ecb35db295c09f4ebed6d5e855fa0b76ebeb26091212. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/UKZGC2304853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904f71371a0bf4faab8f81ec452a81c9e8179da08fe23f1379b10ac6dd648ccc. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/UKZGC2304854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2d2d3fdb64574c863c92c532c2cc789476c7afb25f393262e39d67eb4ff2dd. 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/UKZGC2309230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d74f173e4952ebd1eb137cffa3e0606b54432c8d22f2cdce1ac756dcffbcf3. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZDA42454230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4684410d4c675b3e142d2ec3c901b140f685e33f7672c63cc3398f6e3577cd31. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR9Z62400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec18a8f1d77a82ab26c02ad3b58d68a6f32516915564f9f360c93f8eac68504. 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/US3DF2467475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63478ccb422ad0b3ea78c5c09f6a7a2419feccc389846fee2900fd84849ad326. 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/UKZGC2405692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b31c388f82a52298c0b81d6be51e2767d38de4e9ebcddd98f107c6ec6845b5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKZGC2405682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb836919d9dd771efb8bef63efe1419ee28c092d8b98bd331d824880a61159c2. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FR9Z62400139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc439c0af5242e2e4af46a61fcfcfae2551b031e0120668cac1ff5efb3ca1e1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR9Z62400141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e2aaef4d298c78c8b2e1a3e5bd06ab88badf1f00758dd0584d922c02cc5354. 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/UKZGC2406172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5331d3b0ec504bd57924c89cb0ed36d55e975f4235832090dd22ba2bac809692. 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/UKZGC2406176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9575df0935279ac1a143520c4e83ed0b4f4a549b44af765414cc7b686969e78f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZWFT2474889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef1c22e0cdef955bb8023cbfbcfb1b3c17933c90897110f1ff852828aa3b24e. 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/QZZ7V2477721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1029006262efc107c49f35f4f67f5876d21e3e0b9d7a7878cb47091b3f21150. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZFZ42548537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62595a68ea044235b2526678bc323c787aa611929c80c33baa05732b5679073. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZDA42544045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75389471c10beb31d848b63e135bf05243f0c4a745cc705a502cd19202100d8. 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/QZFZ42548536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c1afdb571cf8e536bdba06f7ffe0bf1047ef94e697dbd009ee60a228e22c6f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDA42544046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1162c68ebb42077c606f999f9bcd805172c1911a117334ef5b3bc9ff1cff2ad2. 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/UKZGC2505996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6651dda897f4e893c448b2408b0ff774a9889eadd79bc95fc7a97f4d3d2eae22. 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/UKZGC2305530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ba8668072634037ea91dc73d9f5bc0924d140f4c3f72c1f064a2d18a85c8fb. 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/UKZGC2305537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b1439140ec17d6510c262518d85146a4453d9b3473a7e3cc688466c8fe224b. 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/UKZGC2305543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72246936302c06bfd43cbaa7f6bf791866efe5faf0426ad04d20a7864ed2f956. 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/UKZGC2406166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e2aaef4d298c78c8b2e1a3e5bd06ab88badf1f00758dd0584d922c02cc5354. 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/UKZGC2406172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5331d3b0ec504bd57924c89cb0ed36d55e975f4235832090dd22ba2bac809692. 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/UKZGC2406176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b31c388f82a52298c0b81d6be51e2767d38de4e9ebcddd98f107c6ec6845b5. 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/UKZGC2405682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63478ccb422ad0b3ea78c5c09f6a7a2419feccc389846fee2900fd84849ad326. 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/UKZGC2405692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5488d5e417256f4f947fbadc837abc66cf202eeda1b6090fe4d586f4ed392149. 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/US3DF2427015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7daac520772065faba311d0e10d3cc41dad212eb563474fd2c4d857e0069576. 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/US3DF2427017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cbfc8fcef50a234b9f011c1fa05efff62fdc7f9923ab4cdb043b341377bebc9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/UKZGC2309213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2d2d3fdb64574c863c92c532c2cc789476c7afb25f393262e39d67eb4ff2dd. 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/UKZGC2309230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bbeadd118f757ed5d7bf6528bfde23a79d9a002b9bf9481d2693c2d76c802c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/UKZGC2502676.