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 0x2edf7cfc44828f9201c66b8bb9f98528b44b9d67436f267cf0c9dcf4e96b37d4. 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/021618a4-ef9d-4a85-bece-16a5780c7d40.json and https://artists.proofprofile.net/proofs/artist/021618a4-ef9d-4a85-bece-16a5780c7d40.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 0xa0c830c934e054771d60a404d1a247676cfb0c19350e4c98bee2caadcf774d68. 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/QZ4JJ1668427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07682bdbfff49cb8d1d9c120fb7b587f14da997a5954b84994b221ebf69a98eb. 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/QZ4JJ1668438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2dff2d83568830bcfc38333eee433814f85c9375151560038ed24cf84af224. 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/USCGJ1875690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4582853331479c3ec3ef02102ea6e69486df006d97c33d21f7f3a7693d9abe27. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/USDY41888203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2440add7cc1381cbc78a9ff28dece4297905b452c6611170c763e6e62b2ac5e2. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USHM21884522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b039a0254dbacb19f5c5579145a5c8aeb7e92f9650a9aa4f7b31489677dae7f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM91811001.
Rain (From "Fullmetal Alchemist: Brotherhood")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3778feb250c444d8cea70efe01c7822c7a627bf39ecc2364b12b104eff67efdb. 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/USHM91839906.
My Best Friends in the World (What Am I to You?) [From "Adventure Time"]
Hikoukigumo (Lo-Fi Hip-Hop) [From "The Wind Rises"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66d3c4b498ccfd2f53b1b3cc10418f0d09fe937d5b134f46d73c6e5bda6b496. 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/USL4Q1874093.
Hikoukigumo (Orchestration) [From "The Wind Rises"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93191c7bda552dd379d842b2d96707fbc4c46c410b0f5bf2db67e73ef31adebb. 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/USL4Q1874067.
Hikoukigumo (Ambient Piano) [From "The Wind Rises"]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb488b11acdaec0aba6f87ec9ad859522a8d20e0f693b3d3c88c263cc605113. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/USL4Q1874103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ea1d7ec88c08d6a963ea9f8b1d25766bddc384f2c43a2fb3d0d25d04d893c6. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USCGH1954351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edc3a527f6ca473dfa43ecc824f064e922161cf45116b8179decae3854755b4. 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/USCGH1954353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac4bb40df4681f7d1b280f450046d50c658aac34370455f47362a81a4ea4ad8. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/USCGH1954355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14b4113f98355eeb1d90fc369d70029260ce42c50245d2f6ee03aa35fa98334. 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/USCGH1954358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe126e5cf20f13300a7196ed31f5885ad6ffab01805aaa8d4f2d672d46afb79d7. 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/USDY41915162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02e22074046ee2a39db1e9758acdfc8351ae53539481c06ea6faf9221315960. 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/USDY41961942.
Again (From "Fullmetal Alchemist: Brotherhood")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d292ff1171d8f10bf9adfacab533bce40a41ba1101593e7fff9757e48a8f6f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/USDY41944914.
I'm Gonna Fly (From "Kiki's Delivery Service")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80af9f46fc050b1e61c72461641cf7016172a25a0cab3168bbbdb5e938b32e69. 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/USL4Q1907812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4fe47480415184f11d7af745cc6456c288a6f90d55b3139397aba69ab490dc. 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/USL4Q1907816.
The Tatara Women Work Song (From "Princess Mononoke")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbb3fafd410e9699556f8e6f6d7fff5c1bf1a81161ebd8d8cbf3bea6b89647d. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/USL4R1921483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd0e78184321ecce1d2147975c0b6c3ec46773e74ba977af712da716d41be14. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USL4R1921486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117da55f6a27176e6ecb43a7ae992504b0ff2247c92853115a754cd38b9e4a32. 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/USCGJ2029382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3291d819f09fcbf23a098df371a61ad6aaecca5a549bcf691d8b263abc08c5. 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/USCGJ2029386.
Shouts of Smooth Criminals Are in the Air Tonight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81268375c32169ccfffe970b0797d1517fea186050fa48718fc114e9593ee707. 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/QZGWW2123209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587335be50d9784f234e5350b8f02dfe5e2422148883702d8ee866cfc127ea43. 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/USCGJ2127837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f23ff5ebfcb1021617822129c2cab2bbf78f976679f6acbb1f7ec78569add5. 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/UK6KW2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154dd3cbb5400ce36e64af84ee69ffde726d8001d0b3614493bba7c79529db57. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/UK6KW2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc749513c23bedc35fa6614f536d7468a6a520114ae98e18b554cce0f041bdda2. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/UK6KW2100224.
Modoc Nation: An Untold Story of Survival (Original Motion Picture Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bba8d87e2f46f5de6e2e8555bda496a3ad49c616136b8ca63503e01a6829002. 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/QZGWX2199310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8ede3b7a5d948204ef65e18402642894f4593c7145684182fad09ad92e46de. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZGWX2199311.
Lost Songs of the Back Catalog Variety, Vol. 1
Lost Songs of the Back Catalog Variety, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f181de2367e6eaf2eb5e690ce79d4f2b877c71d5868c7b24407b13352a6fc7. 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/QZPJ32176959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa49bb2d2f58fc41058d0a73fec3c9fffcba231ac77c9753b2b94df77113502. 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/QZPJ32197839.
A Lighthearted Instrumental Christmas Back Catalog
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9cf45f6d7440917644c5957521578c26f756304162715e5d8c2f9d36d2001da. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USLZJ2508503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3b654614693e03edd707411f4ffc9071b771d3d5c841bb7d1fbf0bbb6bb185. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/GBRKQ2576549.