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 0xd0ee741211520f3a19dbd880e55a05668ccac43ec13048dd604235958541a945. 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/34594be5-5dde-4a8e-a023-47d25c82b89c.json and https://artists.proofprofile.net/proofs/artist/34594be5-5dde-4a8e-a023-47d25c82b89c.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 0x6f39b5ca0ad751e63cfac66bfb4120f81ba40a4533599bacbb6b2fdbf86ef41e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTAZ2452338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f486742bbe8b302a6c37ad058f1b58a34cb2051472a54e05716cd6b1f572ddd. 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/QZTAW2487913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df52ab0b5a791e59716373d77243c0900a1dc393814af7c1a704d1bc147c4f. 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/QZNWX2471235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9cc1dd466a04fdf697b45ca7c948e54d0b66516ecd50fc065dc98225affd09. 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/QZNWX2471237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70400517d58e8f177518bf8027e54037800577ecb71b02e65ca7e26533e667fc. 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/QZNWX2471241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f46f2368576a25e7965f31a7705ceb1fb6b9d6c78d43d842e2ee0bbab384bdd. 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/QZNWX2471249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802dde667e5285a3c75950b832ff691f8d1d9a00c24304077e121fca76bd07d2. 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/QZNWX2471255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb01a28b4653c094a746b74c6a424ca34149dd1339a4a6e136b1889830723711. 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/QZNWW2439575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edf8fcaece106f7424027a844e9bc24d3a3508067ad079768ce9c4701745761. 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/QZNWW2439578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f7b5173a61fe0aa79bb250f7746e095e3cc89ee9c4fb840738a925a2516ec5. 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/QZNWW2439580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9349ccc3a8ea30348a0cecc9e16b5dda79e6d0fef53fa509bf5f0342a0e556f8. 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/QZNWW2439584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fefe4bc99158792912ff0539013df7a883dd4f065407bcfb3ccf347c96fd50. 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/QZNWT2414260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa89bfe963210b2d44d1101b72c43bb6c4986366b46a49367e28e28a6d6fa46. 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/QZNWT2414272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe267d9fa05e68e8c2e73879b606b291c7ff4d8da62265a06c605085a4da1d888. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZK6F2452285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a23e382e3283694cbd7bf3dd77b9858bd8d89989c546b40175bd411bd17664d. 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/QZK6N2489044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830697fc1f614c68934d3d40875f5170b2a2eb88cbae2725d12e5311f40e8490. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T17:00:55Z), 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/QZHN32489743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8efa540ad9d62df2e611b283c38e0caff225a6fc86696e3638b7c591fa306a2. 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/QZDA62474233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b09333ca3fd74baa6a53bbc83544a93075ab5f00a40b331611a8ef54afccf7. 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/QZDA62474238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cc014e0c0796c006cfd4fbd00398696539a2cf1aa4ce1d8f64b43b39721f40. 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/QZFZ72406235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1902bae7866c7e9a45c848e9be143fd9f91ca153dcb7ed248a284c6cdda09c60. 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/QZFYY2473499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab9e0bb234ffeb7569b6dbbd6fa869ada65190cf109dd7079c9b16424fac1c0. 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/QZWFQ2361578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9234954badbf14d73431ed12c049659ee2408b6f84f33c996ee10f786b70fbec. 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/QZWFQ2361580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635956fd46340b7780a13be8b001b69a218207f8097a566f9c695db3bfbe61ea. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZWFQ2361582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfb1bb642d7dc1dadae10912880db6e348607bc08d31f6b3c631e313210ce90. 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/QZWFQ2361588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa757b0401284b75dc83857ccb6cd57396cb35007ef3e670329a8ebf8a53a8ce5. 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/QZWFG2351317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b20f9a2b9322194ced0381bed17a026e543093d7fb11524e0c1b83b582fcba. 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/QZTBD2367464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7259566368e22ac0f95aa4997a70b281fc7f36c47727e8fd22dc275d2b34c9e7. 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/QZTBC2363000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e0315fd5171922633514ea90a7ec6e3bb73396e924d4e630258b334ab89cea. 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/QZTBC2363021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361f729e4d90cc856e4e9aabeffc2aabaaaaec5777936a219fc177436e3e837e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTB52322457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb6f099848a847f83e3d4b97b2194d477b52a289d9cb3c01c7759c05a0e232e. 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/QZPLS2387962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0b53d02d1c5ffb41a518201757404d595aa6a4babbe6467ff1a454115fb57f9. 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/QZNWW2396090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f8b0cdbcd2be965a84517a7f008ab37acdff0c58da94c5993c4fc803fd0169. 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/QZNWW2396096.