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 0x25b07b5afd6e02964264420e7ccf70b797c7c66db912ca14137c9367daad29e4. 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/e8f3a34e-cc0d-489d-b310-22ed3393584e.json and https://artists.proofprofile.net/proofs/artist/e8f3a34e-cc0d-489d-b310-22ed3393584e.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 0x07c7ab79155453abdd6250c4004de6fc939e6813349a814aea051468c9789c4c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZNWT2123226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1529da3e47746f725a750ba66266e67dd8356df07e3b1c7b992838746794541. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNWT2123239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa249252297e6a419726a639a600914ce2fc329f682a482147eb012d5598279fa. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/QZNWT2121602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d75cc3c8249032c3c8a2e405d6ff5942bee8a5b60a88b354c7778be725da6c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNWT2124457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee81f892e4118a7f0fa7e20a135b6f4e21a34a660ad69e7af8ca88209c536a25. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/QZNWT2124444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5009be9dfb098009ee2f988bf5993dafb5528e5228f6b1f3c568a08fdf8d3c58. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZNWT2159823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d1c4e8745c923a8fe353700d41f8131a0333980208838d06cd852afb662756. 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/QZNWT2159875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7e4e26c40763c8c44ad3ff0de50f3fef5a261fe101d709966c61b0dd9e48b9. 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/QZNWT2159878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ba5f7b99b767d80d9218613c03eaa1815136dd9bbccc8408f7ce47268ca7e8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZNWT2159879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1533106e270118e423fab5d1e4d09dfc08529068274dfe99dfd51f347911b6c. 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/QZNWT2157949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccdd2ce50a36ddeb93946305d73526a853457a2d5e7fe9510d3bba608c1244aa. 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/QZNWT2157951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc827e10995378a7a909b190f7c810c7b858c3777303f30d9a5583f696a9bcb7a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZNWT2157960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ade7250d0aa52f7876323d4f03e930ecc32e3e6b0738bbc513dcdaba20ab8e3. 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/QZNWT2159850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfdedcd35a6159fc6e8eab38d1a554bf05578df8b18d1d44b81d7c00a4b2ab1f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZNWT2159851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7afb1094a21a179e48bdfe9f823a3a844bd763217ac14ec5efb17f8587681a. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZNWT2159853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d56c327abad48a15a3912ef6476e17ea4c8287cafb55cc6b48ea9b5deb45d0e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWT2159855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2354ef1be25c445754c688b0e14dd614b879ff73d173323bc177ae0f6f541b11. 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/QZNWT2147349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b0255817266a6af497d644d74e068790961a9a518cfa24ecfc22fcdb5c2d78. 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/QZNWT2147353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b23ae0ed9fdd392cfbd4341fd83cc958792d906a381f924c0641a9a0bdf2663. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZNWT2147356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b35a86043dc8be5a374e568dee747029f1c02260b6e76ba680bb1d19a27c2e. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZNWT2147359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74d3645f33dcb0f2d963b9637b57f7bc9bb708f339bfe283f934804f07b81af7. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZNWT2159859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb077382a025af2f5853ac3a9baab51c2b812062aedbeaaa12fa8cbe37fb11e28. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZNWT2159861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f68d6860ce3f5a7c46e4f0bf438aef7c155246a5036c45c5ced5fc13ef49486. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWT2159863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bb96692881210b820473765a0ebd2b2c73df60d691117e991d0d9ee04a764f. 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/QZNWT2159864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ae119393cd28e94a54b44df0c7f56c37f8b7bd8ad0f441da16b530d8484fca. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZNWT2159866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014a14f3fba56ef112c4cd3078aa31071387c6be58c5f365ade510ae0a9d69d3. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZNWT2153180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd601a1075e4da0d96969b9de15aaeced0a7e3fe9a9ac8951c03780c684c3b568. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZNWT2153181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd815da6cd24a3c9ef05068115e3247ffeb2e7046b8375a0a1ee053251fea1235. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZNWT2153184.
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