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 0x245b4913c987d335b9bb6aa204ef7d45c3d3fdf179c355bdabb797bd700988bb. 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/0230cdca-7ba3-4546-a965-047bc8f933d4.json and https://artists.proofprofile.net/proofs/artist/0230cdca-7ba3-4546-a965-047bc8f933d4.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 0x5ece3959892ff85b6cd73fdf93447738b964adc3501601b00566da39cfd5820a. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/SEYOK1615535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dad5c4604be2184e968c2f1b523968ec95547a21582744674c0f692dfab9076. 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/CH6541854342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2f289574577e7cddc797fde5c8922938b6e6838288291515b71d3d9264349b. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/CH6541854351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6298c2d054afb0a28a2f5889d81ea0ac53789d21d8e8a46ecebe0f22bf2be333. 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/CH6541854356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8d2c35352dad1a75c0e7fb2512034c0fa5a9f8cb2095212ce7cb496d862dbe. 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/CH6541911214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64a8d4bfc1fe5a00c8b2f251ff7b4565e6a32e53c8c8fff21e18db3b429f898. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZES82091198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34a54309660929d77fb520219069245a032bc32b5b732a90ee4e85d5b8321c5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN42107597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e8a0143ae2ab9b4948bd8986903946d20a6864d957d46ac3cfc96d07ed164f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWR2162368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8113029b78ca848e94f972334bc35a8dce027b9f61af8b99e7254e71d326181. 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/QZFYZ2254184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee0f17d60ec803ee960a2c7a9ce97971c71c259beeedbfb1ed3decb9559ed0a. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/TCAGH2239334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa695a7b9166b00f87522c06edc88356dffdf80d70bb178991f8c4bdaca834cff. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAGJ2240947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8e712f7ad3c10c33ca7d757fc6d769146682986d045481bdb0a83ab3022565. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGM2260598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb041741a152b2bd30d99e00fcad3f1f9d9428197df6295c5a53a30c339a272. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGK2262807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7787adca376fe54f40b6b3266e03177667afd443ace9baa8a8336e530fbc8328. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAGP2243838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c1043e70c2a6651a7821aa15eeaaae1e763456671e0851ac0486c6a2552e27. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAGR2202241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ac8dd399b22144771ed2307f8912251446a7a3ceb318b180ff87e8c9e6d7d5. 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/TCAGS2368596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15b87df8c0aa7cfbf5029b142fa864a222dc88fb088db24b5066abe875c7341. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/TCAGY2381988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05565d6e5b276c36cf78c0eae7e472fca49124c8213ce19c4c0de069bd28f29e. 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/TCAHB2367295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43bbfa79c4df0935dbbedf0bdf864a99e33778348b661f094b67ab6653e64f33. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAHG2373537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501c4b18905a02a92995909e1416d19ff37d32641ffc3efdf2bd76158f84fbf1. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAHM2347672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78048de9356bc2434ff0e3914f51c9f73c440d404ac3939a1bd77ab422075559. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAHN2316043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f22c4ac161d049a03263dc4fe7b779f026832df301bbab1789f68b2c6a4103. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/TCAHN2376654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da089f2980d221b33e32e7c4c3c6330a7fdcb548ca09c7aa054aaea4b50b367. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAHZ2428571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f40fefac64955b6e3a62dc0d5c7679bb3631d55e77887da2027c51d4c230ce. 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/TCAID2481882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8440dbd6ec084d5e72676ca75143ceba3f9da9b5b5f701abb38120685e7c301. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAIG2423855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a4471d0795a75fa4f29b4f2a82d4f405c8242a6f223fb42d92abd36f6e66e9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIM2448938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63583e4eae41d4c1ebd9dec4ed391f80d430c1903562bb0ab5a8fd838a570239. 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/TCAIM2448563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e9b761d617e791569988c9af4d568a8366344e92df5c17f56894773e2d4f6f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/TCAIT2421814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd303a3bc25f3b572427536643c9281ac402904c7b988a0dbcf85976fed5e7d2c. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJA2478356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa06233e4ee2ccc4b51ce14411010d665d89c62193d8501b3804e1dbf77c18c. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCAJA2478437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7685538aef3469cf6d712179d0f521cea0806540fabf94e8dc8cb6d86483e1a7. 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/TCAJE2466060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eec1b0190a37b3cae7d30a176f764e08b65d9b5eeda7b7a5251dcc74a8cd1eb. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/TCAJQ2596683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2044fd2f1a79ee267cc1972b3303175369ca852d51634a3f7a7afc5e35a7568. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE6I32450394.