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 0xa017b5f1834390d0528b4c3556fa47c9cc9080b1eb907377d163ca2447885d75. 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/fb5d101a-4b87-4b8b-b42b-964073c96a3d.json and https://artists.proofprofile.net/proofs/artist/fb5d101a-4b87-4b8b-b42b-964073c96a3d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mismatched: Season 2 (Soundtrack from the Netflix Series)
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 0xdce254215d1715057ff6c8eecf1fc96ad019181d60e792ebe4008dedc3286213. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ8BZ2201989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c93c38a07978df819d8066762e2c296ccc8cb18fc0a749f4a58f299a9dc3f02. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ8BZ2201997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa763daa951860738d1f4d35549d3dd2e68878163e1de23a7bc812af76b775369. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ8BZ2201994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5253e2f1446ed0eda537aa3b92410524910a926789975505ea56f24162583344. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ8BZ2201990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03704572f6c6058509250aee3592eb74b201faa876e5d2b8a9edb9419cf07fc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ8BZ2201995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752d3731de81945dee67d29e2be93402030e6b145e9d2325ce94c5d64c82fc9d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ8BZ2201992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74cab9db68fdc40eea3d4bf7db7c35a2ae8bfdfc63fe4ced16d3c7737ef03bd4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ8BZ2201991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7941f1934f47ef3505b3eb312ef7d61fd42f0e0575bae339a2380ee3bbc1b3f4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ8BZ2201993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901beb9fbf145a53872c873fe9f9823ad0c12d74c2c4d5ed977c6d95321b26d4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ8BZ2201996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ad8f5ead3dec9be189eed8344407fc4d71142e1eacb303e3f6a4c723b0e429. 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/QZK6Q2092536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab91d038660ea6c98c125c0ef0758c30eb6843adb530ea1c0a8981e7a30dd52. 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/QZES82358473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8def41312d27d3f4ab6344ef6ba40d4711f7ee3c049c75a549f49bd0aaee482f. 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/INO132100644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535e1301a24cc381e75f878818e8e4fadbf859437f4eb1c02922165a944e4e71. 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/QZNWR2016996.
Mismatched: Season 3 (Soundtrack from the Netflix Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c01061a2a0ec11f36805cfbac198111a6eca034b040a5492e4078105523ad1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INT202405090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a63264050590515286dee230382e1a9a858832642db09d11793a15f9ea7ff9e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INT202405091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffa0dc001ef9d59cab0103881102c7583209a3aacb338d313c788ba6c159c96. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INT202405092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457fe7e02da04f436346dc8735bce448567cdb4b734a74f2ca4c392c3c368c20. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INT202405093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abd3ebfa449893664fb7806623638deb2b0ea6c43785caf3c5d755a54f80312. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INT202405094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b81f6f02394297a086b9f0d4794a34e70a6b1a930894eaa375325df4c280ceb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INT202405095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf376ec91b43d698c3c7f363a39be8e204a651aef913b7d90f78a81fdbbc69944. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INT202405096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8ee45a04b77f0ef77748b6af7e3dbb40fd972f9fd677c18022a0c0578de11e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INT202405097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5fcb4e310b93797f2fd95de9e7776cf3c3ca5123f06e18103d8ae85a55d9ac. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INT202405098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4377e1980f85f60a5250923a4d8d834d0fd03d62704fa86e7dcb557afff0dead. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INT202405099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4e8672c43a08607e7809ff3ae897a36de2b620e85082269921f3667d68b6f6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INT202405100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bd7cc91486c0505ca49c16477d2bc728e9a684d91ad1cc51ea07425b70938b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INT202405101.