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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f00c1d8255c2b8d06464798685494a41e52c31430dc981ce0be57c5945db83. 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/71626248-ace2-4d90-99fa-3bbcddb8d292.json and https://artists.proofprofile.net/proofs/artist/71626248-ace2-4d90-99fa-3bbcddb8d292.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60aa30aad3d2e2cf0383ffdf6fcd2473caa395fe2b7c996107fef912c7f18a9e. 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/NLTR71500037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85aea8469e7de7f874caa61a7d48c84f6ae4e3d40f4ae7e8ffccdae391b2a35d. 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/NLTR71600075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d4796a9c7d4ace8b4683d3bd5ad3ec64cdf22947e671367a9e08a0897da4db. 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/NLTR71700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268b8aa2cd15e43f039adadb27de4926941bed80e3bdb99e7e1677049828a441. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLTR71700057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c458307b3c981210fe7ad241211208a34b967413c5ec7af977739be89675c9. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/NLTR71800075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dcef22502875a117e2343cec921099909b102bcdd72c2cf132cd6c857e6452f. 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/NLTR71800076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc54347c00df4434a9e12ebda81fc9c44f080103237282ec846543398109d556. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/NLTR71800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454fd65a3ff23cc1e2c059c955328848788cae5fe8e1a3ce9a4d983d5be6120a. 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/NLTR71800078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5a72b05f0d56fd432dbea28756f9bdcc1737813ad02471b7c4efa61252cb787. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/NLTR71800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085be13dbaaedf2b0246c181ac1ef96ccc56f6132680e43fe585430602e909e2. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/NLTR71800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbae9da214f369613c4d863cc265253976c2610baba5da2ce1559fb8ea93ccf2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/NLTR71800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ad23c2b368327f458a18e2ee1932b49ea1a3f7dcfa065864c05b69c0cfc949. 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/NLTR71800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ba8e5d8ccaf55853ea0c811d26b358c5762c5cc5738903ebeb980cd6211b9b. 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/NLTR71900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688f765e177e9b8184d71c6e2ed73141a06f3068ce07633daa5ee45964cbbd14. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/NLTR71900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95885f0d3500e157253120cddb2e085137d74977b6fd0b17e70a86d549661f8. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/NLTR71900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3982b090bb583bdbb9bf191fa4c956ba9efac734dc1a6f14f53ce783100dcd8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLTR71900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835ea1b22b3d93a1cec69dbdc07940c7f19e53e064db6bfc772ed09145cb6ebf. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/NLTR71900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3684fbdda193dc4f96711e785090e32b342a11631eda665f8a00d24627135f43. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:42:27Z), 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/NLTR71900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcee3400732162151f87968dfbc7069425690f51b9b502ad776d06b194e8d4d. 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/NLTR72000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb66368d3501f582c4f14c68c18a257626e910c4be2f59cb58808f57a6a40489. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/NLTR72100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366ed79e3d2a845c2291abda9200659ca0368e70a734ebfd67d231e5fa22cb0d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:19:05Z), 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/NLTR72100038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8903db4c02fa4dfa0b62e4e9c80d631eee0a37a62ea9630e9d5776a4af4352. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/NLTR72100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812737e66d595558d16efe79e9b4f280a757d62f88662cdb8a9688075c318cc5. 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/NLTR72100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d72029784180ec06ae995bb326cf5cfdeb21125b6a4039527c2a8b924f6f42a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLTR72100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95aca23c4adde5bfaf5d32f85ff2a24599c49ab53f5ebe194666d7246f47c663. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/NLTR72100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5f0f9512e61b21dbd1919e1e80f24a0613325589dad2caf6d9a996342d46ee. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLTR72100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50e6472af31f3764509e13c1fb5f955f4cb3be235a3a4a4f4c74b5ff7731af3. 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/NLTR72100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9a7f50804202f2078d3c292b3b042f494f87704afc373b6405c0b8e4ccfae6. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/NLTR72100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3e78fe1bd289a1aed954c291ba7e0048891be51cce39142680d57e580e1906. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:01Z), 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/NLTR72200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a8605f9bf67c328bf0b8cecb41759dde06ea8d51557c6985991d95300c9f32. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:35:04Z), 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/NLTR72200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813aa9475d5bd285a5a6eff8dbcbad34e06f5b0cbd097b171bfd3c9b6d0efe53. 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/NLTR72200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f07734ef6778282405005026be9b38b9139cf4517f36679574ce479a317e61. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLTR72200042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d96e71de6ed3d3419cc8b38533d9406ef8edf59c00ad352cba1b74fcede0655. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/NLTR72400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585b14487d895e90fbdb8f52d7b22e45816b528012a77003dc591a19a125f9b7. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:18Z), 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/NLTR72400003.