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 0xa6c56a45d1ba17154606e02674a41cc5dd236246e15960329659af9ab002ef40. 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/1a986ab1-f5a5-47de-9990-3953c5633d0a.json and https://artists.proofprofile.net/proofs/artist/1a986ab1-f5a5-47de-9990-3953c5633d0a.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 0xbe51cdf9590d1741c8a084f6859bd5353410910d3c67766513bcd57f7790eca2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCACP1605080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c10591b655fa31b20119ca1ff82ed246df5155fa5773d157ce61a27cd47ed9. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TCACP1605089.
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 0xa78ef0b3085c927d3edfa917bd34c65409372ae588f946171d674da9c80f42d8. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/TCACP1605090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77a49bf50473b67543386b02ccaee0e0e1859cf7b027e49c8af2458094b797a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCADE1704257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827bf48efd5184ce19350df525ad7941462bd075f776d34c16bc26679020798d. 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/TCADE1704276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc6a72590c322bcd049220b94ef746a4fd240a260bac2fdb1a7a8c9ad2f77c0. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/TCACY1788509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615985462fc0efee06f4ceabe150bacc0e767ce1389abbeb45c27e4793e05ec1. 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/TCADR1821757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66e2b80711a9a8b73e8bb414e252fbda9a1a5167b08bdcf5f31b08fb961f106. 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/TCADR1821762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa289257122451f7f62d9d39bc07103c3e1505dde03dfea780c8c62f86e1a9846. 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/TCADR1821766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7dc191f579893f1010b69b88f70363c16b80a3e7d365d15cd33a0baaf3211e. 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/TCADR1821768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81eb4cfc092f3cae2ad5cd5c79b80cd54a535fcf627087acc70ca10a5da4795c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCADR1821759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc120c28e123df8b6237fd26284d351ce11a5d99f6a42b6ac9257f468a0453d. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/TCADR1821765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df64a0c086d86541d361fa99dad4eb01f0da9dfb47e113d5e2c2eae0ccab30e. 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/TCADR1821767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0baefcd055d3f9c294fff5498bb87af35847add63907c0d84ddea8fb1f0fa4. 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/TCADR1821771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c56bb65f466f7268eba2e3da70f2122f614915587740600539360b748d09303. 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/TCAGO2289159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150892b019a15a5f490d0c371526b93454af00926f65f292acc0a4144b40d2f8. 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/TCAGO2289217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29d7968fc1d3cc194de5e9ceb4cf89a7a7a355feddf65d5c576ee8252383930. 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/TCAGO2289280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4818a60ad2da4414f0485078da86161a9db2e7f7a501c9a4ec4fbdea667d2b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAHS2319114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf51f13fb0d34114646ac2d75a5a93ac80d7194d08cf239cfa9a641041c5e1a. 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/TCAHS2319144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c0dc9f6b932a05d351652a482fe64fe25fe80e055746735a4334102f79ca19. 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/TCAHS2319169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb008ff1efc165a0b94292bd32c8e36dc0d0ee74b1edf29591c2088a9dfbbbff9. 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/TCAHO2365673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea27be4d24f413a6c598cf86e0f9c5921c02b0137c9888556b04afecf4a9539. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHU2486630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad82641c6c6b1e373a2904a337384a893ff6ece5e25f2b18dbd266dec47360a1. 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/TCAHU2486648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8874f367281f4da802a4804469503a0c9fd8c5968b0b967e6025e1b3d284ce5c. 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/TCAHU2486658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fd0c107b1f2f5537441a382967b5adcaab63018558c177762b4b40f445e1ed. 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/TCAHU2486664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0393e90bda7f61cf5877ebc6e4c69240a00ec4668a7d5ce54b57e0594287ffa8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAHU2486667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6b6a3a281bb661dffd8324b503569af96f01a91684f980fdd6457da57e337e. 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/TCAHW2421147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95204f58e391e3e93e2d1d1dae86916886e4f5255309f125afc29064eed2dd5. 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/QZES52593892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75401b3242cf38fe088953599f420a43920c71df48464b254c07bb7e0abe8c7. 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/QZES52593893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5187582fc56bf88671223dc56e4634b9e662b545b2d2b8c86f042a3f1c667a56. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:43:18Z), 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/QZES52593894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cc03574c28bafc680b56b9404cd0fb98d64b8afb9d90e95645274c2381a4d8. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZES52593895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe65fbb304b2840061ff21a9377d759abbc1a7895d2ce992060514642d715768. 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/QZES52593896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x659fe4790215974630adf2b46026e5c4989d15ef5572577b15fa5360f8b63edf. 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/QZES52593897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910c0fd1ee10a7b3ab83212d1b625b74de2118f4cdbfb1a6887cc45c6b985ad0. 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/QZES52593898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9647217eacd562f798682a56b9f021c13228049b5187926bd240d87dbdf4506. 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/QZES52593899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b41f4c4359ee5d4f24c2d13297c0f43ba9ac2b7f4395799bfe4094f51801d82. 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/QZES52593900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff89ef3038f22760a18e44fdaf61dc4b2c25c8cc58e5e9326dece5e657fdc192. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZES52593901.