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 0x2fbf8763da990386407c3dcde2f57269cc6bed542afc51ee2cb25837d2a951f8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c828de0f-575f-4aee-bff0-ceccdff262f1.json and https://artists.proofprofile.net/proofs/artist/c828de0f-575f-4aee-bff0-ceccdff262f1.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 0x95ca6c4a291ba348e8f94fc86f2a4689c4352a23b93dfcae8ceb4fd0901f57f7. 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/QZMER2411195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6733d86c33bb5a3a718a252b6244bdc5300be82a9019d209e5cd8ae6428b5b3a. 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/QZMER2413443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec77a28110bd412975cd46c67dd9a6fb23bf725dd2f51c27aa7db815fbc65a5a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZMER2411204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a64128137fc1f0faddd5eabbc7a2ba13095a00c835dfa2e7cf15a71496e8d9a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZMER2411207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa7a9306cfbb0d236a2d011b579a0f14c5c0a48bfc51a938d9836e8adc84e7a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZMER2411198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545e2303487a35b2fc76f8be7deb05345731557e6e5336f61dc962213487f24b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZMER2411222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf177674ffb577d0768236f0448138693915dfac2984de24b5c66404cb00877a3. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZMER2413458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92c6f0b5160e20401ea4ec830e2d5619cf34e05a527aaa7f20c73ac62531302. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZMER2411223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa677368e85a2ebb2af762762e2c7dfe9fad1d07fdb378d66630b43f2ed7ca2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZMER2411197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693a22e59e9612c103d5eec4bb4f739a40f22a9f9dab589f17d5b5c72d9965a0. 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/QZMER2409326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86005780ac71f83afab38651ab6ac46065c11bbc8a913536f0d09785b7090562. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZMER2409327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11274f9b7df371836d1b7b879295ec1df4dc218faf5dce6813c75c759c320059. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZMER2409328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37612c5a24d111918d03a3f31fb55b6499e4af61d4fe318048e2ccfc7e03324. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/QZMER2409329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3bec22a54ede3729e9290800d3f9f04add9c6d2147409725fed92bdc7fcad3. 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/QZMER2409330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e52f8bc8fef30d09cfa882d33a0afc7f6a3befa16548dd17b60abf6cd58fa09. 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/QZMER2411149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66fb3099baa7b3983c9caa9f9ffa0201d7e13f661812c3ca0ab88b39caf52ab. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZMER2411150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0af685ddb9d063d0f2ba5a659c62b51b9f5206550f8c3be18bc43a9048774e3. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZMER2411151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119c323968443f52f1f000763141c6c8d0724d8356ddbb4a800a51e540eb8857. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZMER2411153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5117cdca6693dd7b241c81d2470cf06fd734b404d959b3ebe207d9ffe327078c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZMER2411154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e65a8e8f6893bfc213d671de18a418a17b5193c8f6e3f29e41f7a95caa9ec5c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZMER2411155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf853f34bd685d03761f4cc45180224f2c8d292189634726b56bd06f2e19d95. 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/QZMER2413459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274f33675fdf01ccb13b65640451dc28d32d659163cee3ca570dc5fba001e605. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZZ762464175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aca069f0eeb4616ea608d156168a84be8041365abd0bae893c35bda059b74b0. 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/QZZ762464176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06842469d4ee4defcb646f4303e1a8a7122e5df23d31bc43f5d92d036718c95b. 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/QZZ762464177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6183494df03b5c22190542c7a54bcbd3a001dfab378c1c1bc78830645456a51e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZZ762464179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb85b9c1475a2390dd377a52205eaf166bc157881e2fe97af61421b8f239a64b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZZ762464180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81fbfb3370fb92c1177abfcd79fd345b0a6f4ebacdcbd28b9681d3541b27f14a. 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/QZZ782439447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c321418d63b17317cf2a863fab10468c663aff3e9b3f8e8f37d3b80bb8199e2. 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/QZNWS2565875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc4a96f678cbc0e86fa81398e817422bc0eaa35609fadcaf6cdfc5cda2955d3. 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/QZNWV2567507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e84ed2e597e8f92fa1e6d4504561874fb486478486a4b280e83879297598ce4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZPLS2521315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0007951d521875d51c1b68690ed5d7d1eff9f07c2fffba75ebc2c7a8a424cf0. 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/QZRP42593766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afc42c0ea6412860da1a922858e73641397698b5ee359967ebd27c15054bb36. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTAZ2557215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd02934916b3a0cb2f3981a1c3ce686bd717384f46d28bb5249a94da84b3c2e. 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/QZWFV2571078.