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 0xac152ab0a78caae6fb8ec73a9b73d214589ee3e87b3f271f26b75f8f9ff30aab. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cfa4649-7c57-402b-a077-83795685e14f.json and https://artists.proofprofile.net/proofs/artist/0cfa4649-7c57-402b-a077-83795685e14f.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 0x0aa86ce8efdf2ab3442af8881ad75c9cc3f6eac7d63f6ee4f886ad5d2b596631. 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/QZHZ42104640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64303ab4be54aa899ec674d2e0530711dc7a2a58abf98d6670447461d54496b. 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/QZNJV2473590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031ae0fc811c38fd163eb69e4c83f14752673f08b45d6d1fec79c4c16b7e1600. 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/QZW9K2365131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094a10bb3b6c4cd7102a22f25f582c701b1a14f1ccc1c89e960d1ae0f53a8cd4. 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/QZGLM2360762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048ac3668ca60a4aa10617634ff9b04ce3bbf573ea7490a65ace8984df3f0eb3. 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/BC96H2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b1cce4b908f609043ec66262bb0b894598bef20f303bd1deab3906f8ee40ac. 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/QZ5AB2398478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19ed68e91e03c9b65866ee50137935bd6057199c718a90fc4119b050041f814. 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/BC96H2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f2737c4cb710a9aa9bf244efb88cd5d48c6ec2b781ee1ec38a978b75c4c207. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZW9K2244020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e6423e982c82dbaa1c3ab20fdd8c7573533c59643323d696a379f343afa286. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZTPX2244011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2212ba8be6be444a59b52efc229ff016644206df67c6af0e5f32b157c064f748. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJZ2237130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f67fc7fb48759a9b6766dc3919524a0fec7d424f9b1d898e084a9efd19a854c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZNJW2298676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47033fb5ca4b2a27ab9852e15cba7045732a6ad318f5b8a76818992fa81c5495. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZMZ92257489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81050f4426f287fc148ec5e025086da3f7c032ac79508f76b140a6674d0d9aec. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZMZ92257490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47238c036a3c6e258b8a3c79d37084de9196e91ced1dcf5acf051fdeffeec865. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZMZ92257492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ac940745ebcc76fc0db6ff7011ab19d94af0376179619fdebfc056f6f7d11a. 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/QZGLS2245293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46d0c701033ea0f8804cc15984c5c03388e816c61bccdce9f6ee92216e5d802. 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/BC96H2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4313c71e4751f14844d39894b2cfd8a0603d537b053cf2ea56d398cabf114886. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZ5AB2263367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63cb48aa34310b1dea2963f3073632db023bf7fd2efa9ad8e055491c4fc0a93. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BC96H2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb5181bc216e5b81114d38736e82c6530113125ff76a17b6b45d6c8e64fa20f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BC96H2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022fa92f2fa4f4f74ee49bda37f1705f8c8174376ed5bca90632da66baefd9be. 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/QZHZ62156907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6463328c273f33674bfd185e34c519e5864d5300d3049d5f13436947823a1366. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJX2010882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f87e9fb8120616882038ed7acf143659aa081796468271cf4c50b5f148f6580. 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/BCPOD2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7bd5c8c0c2a29b861bc51778cc385cac864b0127b8eae06e9ef7d14a8997dd. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/UKXN22344318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2169359a4878987397edd33205c3537f9e5c9500be24f02c933396492974285b. 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/BCPOD2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efd4057c11eef4e5d45bc5a9e9ea51370c052dc964b94dbb0aae571c0e1ff13. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/BCPOD2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf409c88961a7c35b18225145279668a030eaeb240fa3f55ef49ebe32bc232346. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/UKXN22326115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18d5af9f7c6ac0047a3e38f6246b883eea18407925ba274693566479e4390d1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCPOD2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1dce894c83cb9a42902c40567208b15e885baefbe6e06aaba3ee67ec79a8d2. 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/BCPOD2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dba2a941bc8d7cd0144e8b926ba54d433024337943e6c46ffc3da57d96bbe0f. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/BCPOD2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a66a5f71441fe4e7eb31c7bb6d22013177cedd56b5f0dae8b897026e3472bf. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BCPOD2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd613e8c030d4d43e15dd10cc3b811cffdb0a95bec0102b038ebd3c8e6f24055. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCPOD2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e97a8dbece36e6805a372bcd4eca7e7f6624a6862f42697d65f4f1662317a7. 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/BCPOD2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d91c88565e8ca33bf33514eccbf777f87ed191052a83420b454730a7563feae. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BCPOD2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93a517c9a938134e53931d6f33bb18239aa1c7fd1cb73850a940d92dba81c29. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BC6M22418202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1449819ab050fa13207d4a7b7c67dda75c1f2c4e068b486d9f7257460e636f83. 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/QZNJX2151933.