SOS is a Morse code distress signal (), used internationally, originally established for maritime use. In formal notation SOS is written with an overscore line (), to indicate that the Morse code equi
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 0x345f4b164242d17fe6aa6ac3a67d756f77fa943b8b1c680908020927b1899996. 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/7144a92d-ab2d-48e6-89b9-25d008eaa4b8.json and https://artists.proofprofile.net/proofs/artist/7144a92d-ab2d-48e6-89b9-25d008eaa4b8.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 0x9e7489468bd3bc428cc77f19ee79abde773124cd27d2225be03e91073c2dc89e. 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/BRND31900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f40300e5f17b24f7eb670a99d70d4c74509bcc37b3566dc1c31ce9551fcf301. 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/QZHZ42078794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb87ef8990146da34549583cd9013113f7fa3b576783cee6172ff994edba848. 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/QZHZ42078795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750d01a4bf318552492dbabddc298866c01ba3125546a989077d88e426c883c8. 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/QZHZ42078796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84eb5cc2d8b1c7879d7f1e9046f016b598741416d5ca947217d0997e3f1b02d. 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/QZHZ42078797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4597261018a7c525aeda9bf43110405490195a931c5be18fbe806a8f7fa936c6. 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/QZHZ42078798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07beb7b1361c8ff86e8aa0a33f78415d10d4b6ca6ee351594f6fafd4ead739ab. 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/QZHZ42078799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76be4815990689135f51be354faceb0c52a0371a921d5429b790f297541b815. 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/QZHZ42078800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c2f8312f1ff70938a5b92fa90322e15b5493e07161b1258813c0ab0c298f30. 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/QZHZ42078801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929739ae2b144a854489fc86f420b301ea9343bebcef39fbecc7d637758bd618. 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/QZHZ42078802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44737c2f8deae0d9e55a30b671d8d57cd2cf414de40194df19ee336ced5d0e8. 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/QZHZ42078803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d1668fd950431d05fb3b1e38d2acdc7d455d18ecc801b852377720986ee595. 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/QZHZ42078804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f403979e36881bd662e1d6d3bcae5c043acd06189d5d9448e2d6e6b15fa108. 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/QZHZ42078805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc51a5a88201a812f5a5a72cd8ce0a2135e1b66c4b8f4f513a1199a569623a82. 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/BX1KG2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5713b91d85c06c7e2270f36df59951e32b7b2b832d4f258b2d5d26d4ed74c62b. 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/BX1KG2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147875eb7bab698bc4a7a446aecd46bc86c4678be69b7facb93866ef004ef957. 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/BX1KG2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf7624abd0dfba9ad854972b21382417cc442f8ffb37beee3f71199835b2304. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/BX1KG2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8fd7c1f324ac8a7f5820850f7f9fe5b61b3b176fb14bc9ccdb33ad473799e5. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:23:10Z), 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/BX1KG2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbc233ee65dcafb0f3a2734b72262c2521ed47d345da5436b8edb5cb5497835. 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/BX1KG2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859e2224af56c45f40c9fc1e3f38d2ab2f65372d8f5ffdd61bbe8651afe479fa. 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/BX1KG2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dcd78dcb6a23bf30df92b831e67f532f90a1ae1980039504605b44a7d2f358. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/BX1KG2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd56e7ea7c3201dfb3e73d681e4db8b588c4c00614a67bcef288aa3cfe5925a7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:03:28Z), 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/BX1KG2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0004c50c6528a8128422c025b126ad42af1ac858749c57ee12cc6a8ff4b764ee. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:40:21Z), 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/BX1KG2300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8df2dc71cdc8cc7630778dde0754a5bff70f58bde44a3f6cf90822c03914ffa. 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/BX1KG2300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbc233ee65dcafb0f3a2734b72262c2521ed47d345da5436b8edb5cb5497835. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/BX1KG2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba5a050bbe44549ea5729275ac29336c726687745db5a782b94c9c99d361b9e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BX1KG2300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b750123ae0060b98e5a5c1252cfc55c739d5934d2559adcbe471c774fa21e4. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BX1KG2300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d27e0b7e26be0c167e9dcf55c35621d0a83fec34aa9d7b406eda9e209ce4bfd. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:06:40Z), 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/BX1KG2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f0597bf0c1e80caee431f1ea025a76b643df2b2ebc826a6c434505a2748ef1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BXZSC2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30d08657a6f814b98d4344fdb7bd2bc1e9499f104f12b4b0d80921c2d54bd0e. 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/BXYVJ2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d4c8e58a6d8cbecb7714e9cb1e2597b9a0303b138cc6e5566935668b1bf626. 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/BX1KG2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a661a73e61a1b2df41186f0104a4dd253595b38a01c46656e085b117c072761. 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/BCIGI2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f9da298f82c832441cddf695dedfaa03eb35e9fe6e838e49e64ce545f10948. 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/BCIGI2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa995833b35bd1a334d044362c06175eb10abc70003ea339e0326f32d2adc1de8. 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/US7VG1861584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5ddd61e11447d08c2793cf36696314e31580b9f247b9fe1afd8db9a331a05c. 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/US7VG1861588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c169c5868ae52b931bdad2af98f935d5d8336c8e88524547ece6bdd46af71e8. 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/QZHZ62086716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9e87d6fba4190706de29f9704b36b4e4f043551667ede9b6bff4d070f61553. 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/BRND31900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0c5089285cd623ea6721697ebdddc4f3e6840f6af8ae88a5ce5b138c4df2d7. 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/BXPOB1900067.