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 0x94b2be4e51022f46255bd48dbd50cf71fa8b183bd69aa589e87e0315c0a6817f. 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/05feeee0-e33d-4cd0-be78-4e54088c6815.json and https://artists.proofprofile.net/proofs/artist/05feeee0-e33d-4cd0-be78-4e54088c6815.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 0x41bb6b3cd6a8edd2c699062b39c69fd357de98b7658fed0d265e4e568620a1c2. 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/USLZJ2113674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc404bc6fa17711a76e3babef65a954263ac2e3854a5b3ca0f26207f6318f1b29. 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/USLZJ2113678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6daad40a5f9467b89c05b3f140ce9b614d81bc46fdad5ca33b595ff6dc99db. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USLZJ2113680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8938363d46a800faaf8dbfa855720f9e72d5e56f61ae75d04e3d281ad7b4ab. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USLZJ2113687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3101734c6bea16b11fab0522ac9cc0091f768bf83531cb6fe5ec82fa2a3df18d. 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/GBWUL2007999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5a315e70db92725f6aa9ad8dd24b32ce8c5b0a27cfe5595c0c10e1d5412516. 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/GBWUL2008000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3086690de1fa527d868532c223ecd5750fae087d54380700ce0141463173670. 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/GBWUL2008001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80d22632f0415ae463e0043525fc6638598f671a4ee74326f60ecb44388876f. 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/GBWUL2008002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb26eedbf6391a9b1a3a8dc35c8689e1d663a4a10069ef2da6f685e5e328c387. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBWUL2008004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c1ab78fc7bd0e1b417af411b275eda862a8807c93ecbd601190e8659f4e252. 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/GBWUL2007977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08084dc439562fab8c47481c1522e710354458484f56ac0d0c94f6f10c3f11c. 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/GBWUL2007978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd2aee22bdb0fcf9d546ea92d35a827e3fac971c30176c3eeb66f52aa81d8ca. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBWUL2007979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f3903b7ae4e68de5051487c6cfcbd1f33eac6bfad506088dd68d95493697b4. 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/GBWUL2007981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb275a4d30f8aff4c7d041681b14dcc377db04daf6da388a8f660f8d1af422983. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBWUL2007982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298a605a0fd42d80f504eddc800c23c05bfd993882d2ccd084dd2c667d8a6998. 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/GBWUL2007983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd935e54b74e9ae350eb8586670215934d2c1b47b1aa763cd3f4bec9ca8ce7ce5. 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/GBWUL2007984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba03e778c6af3b56975c4fe62994d16363de0fac4b843db4b9bfc0dd6719ba4. 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/GBWUL2007985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0b501f0369d1b904e7c891815cd1f730ffda5ee9b7d00a625ffb6985a61312. 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/GBWUL2007986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab60957bb445a09a412e3f2988298adf9022fea20e6f0d1f10e1d1bcf38aae9. 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/USA2P1661503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ec965715cd510603fb466752c969bdc8e4db5c16990f853fa6f60295695aa3. 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/USA2P1661504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125e0763c962328860095a9f472a86660869308abe923be06b8c46f256411fa0. 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/USA2P1661505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4dc6637529b93f93bc0126a5a07820a45333ffe50147de4d27514d90e54976. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USA2P1661506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820806b9eddd8ce07b34aea3dcc2ce1d04c3760c91e0dffb6fe94a8076f4e636. 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/GBRKQ2313670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f039d3d6e6952c4477cdb064a3d774533cf28879482653e9ef9c5a6c9ecf8d7. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/QZ5FN2326922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dd7c9f6b2389d1b65ad3e23be820d9192184b4e421dd00901835ac79185592. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZ5FN2314611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d236cc3ca389f01d6641d0896394f059c381288a1e5b505c54d88fe369b9c39. 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/QZTRX2239938.
Down The Memory Lane - Ambient Extended Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836d6e3d181e9781c92f43b0710e2915f616cbdc1811213462a9b3c0ea2e1eb5. 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/QZTRX2239949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25d9aee015aa009d46c919bb129333668619694e9576ba84449a525e9fe67c1. 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/ES71G2143296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35573034b9a63502eb465c7ce46d8482f14aae7d0242b106a1e1f4a64d644aa. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBWUL2019167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702442aafa1a4cf439b96eb182f4686e23ecd840a841485dcf87a4b196cf0250. 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/GBWUL2019174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1154bd2289357b69751a86e8c48541b408ee3c1f8514be4beef9a9b29b91f375. 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/GBWUL2008006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95b783c8ca3cf514bce4848056c360077df0d457363e72cced9a3d437254bb2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBWUL2008007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c7b81ae84114760f219af4a21be9e0306327085a6298a51a634f9e0442e364. 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/USCGH1231078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3b0aaf8b1dede88142f56efe4ce802ba734c1ee3c750ac3c7e1cfe8e183bec. 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/USCGH1231079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afb1dbe2ea7e033692fdad87bc58fb1db3eea615f74d130c8553be987bf2086. 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/USCGH1231080.