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 0xf8c0eb78592273213de4550ba3cd369bfc3ba590d16c7b279cda075b9d60b3e1. 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/035f9055-a68c-4274-aa12-2a9791534175.json and https://artists.proofprofile.net/proofs/artist/035f9055-a68c-4274-aa12-2a9791534175.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 0x8d9e2c3416751f85cdf980020b290dfb6c92f59e532814ffd774ea52b0f67d84. 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/GBSMU0023871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbc218ffdab20bd6f50b99d160e3b5817da5bc5af2363d3aed542e26dbd678f. 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/GBSMU0023870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19f43aaf225453f1bb9263db4ffa45c9b141306a785aa8b7a2453e3ff2437da. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU0023873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecebcff6d191be6ac99374e7c10a8d19ed5e1134de15033bd8b084f42cc92d41. 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/GBSMU0023875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff293e697a1da537e4922d4831a735337ce8b0cbcaf43ba9ae41c1d19e8eb31. 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/GBSMU0023884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6bb0d85f4c9fff8339507fb5b6302e10ac2c42e5c3b7e44a673468b276080a. 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/GBSMU0023877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d7fc03a8847632194c2374d61613ab9ff55924868bc900f0f9afcf9023c1a43. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBSMU0023872.
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 0xc4922a509f6dee478d8eb1e498ff26f33ecfe1b45b2a9ca00fa280c20efd7fb1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBSMU0023874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb25c2dac3ff30d1996d82ae1b7fc80b3fa99209734db1357e0e24cd57803d1. 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/ESA011890245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f823297c31d28ae47b71c1f8302a53db199102080f432846768e8dd8697d381. 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/ESA011890249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e47d565cf4ae3dc52aa9eefbc8dd43b4a8f6c843ae0d7097ff6e033500c023. 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/ESA011890251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b62050759041ea880b758395b10016d10241cfff37f1ba254f513ebff3b4d7f. 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/ESA011890252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40276f960f9d6589a5da4fe3a3a802fd9fb621daa09f162036d3efc43785a553. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ESA011890243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2621fcfcf9984fa708f553ef81080408545a7f0301d6b46dbf5492ffac30ca5a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ESA011890244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed0467dbfc3ed0982678bab72d53ca49a680a4f33867ddb48e1ac8df7b97a5e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ESA011890247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273a934b5ac7247bd1d58bbd1ad0e0c46e20acc241205f2c4d8f93d6814e41a4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ESA011890248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd875d4080cc79f825b3666d16133c87129b955630de2577c4cff3b6f293e3593. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ESA011890291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30bcae636412f69b1d60a16f6bb7a659bcfc0cd1075ed8b83fef9fc718a5f37. 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/ES5301253125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3d2d27230962f85824ebd6989867dc3f6445411e62f8a167983b8768ed0c1a. 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/ES5301253127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9ba2f88ad66ae39026cd27daaead11cca64f2b81d5910815decc7208d12e3f. 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/ES5301253128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621f1a000426e5f0e1cf13ce0eecd7b159e5d11b9c802684dcd266edc087fb3c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/ES5301253120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba8cbd508d13fe072f87d3a09c3b3e1392988d2a17c636f63f6836abd304f1c. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ES5301253121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01630b42d692a904e4b0eee1214f1394fd58b72f3810b5b7131db1616a35eec6. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES5301253122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da2b070aff6b73a3899a92852e420d566a70fc046086ba5df565b9ca5de45b2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ES5301253123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7b35bef524ebbf3169d52e6aa54499eb67e41ccbe9e8252aaf60ffb9395822. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES5301253124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdaa56f7c061513b7ef17b342ed1f45255efdab0c83ceb38b2c04bb4a271c0b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ES5301253126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61f899310c8cdc533d10b788427d53a2e6c7744b6ff081ee3d822d081e18552. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES5301253129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01c9940d405899feedf39528034d1314c788d2b42fc800bf23d441174d3a7fc. 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/ESA092307127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84408157af6dc03bd78b4b178c70c29b30e37901e256e06ee40bb48335e663a6. 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/ESA092307128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fc9e518b0be3d346cbc4a1c367479564f67eadfee10129460f4d20e8449bc1. 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/ESA092307129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff2b8053265c2060ed2ccedb423458136555d92f0d92d1e71d45ac94c75d17b. 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/ESA092307133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9630265847fb940157baccbb745efeb1fc0b60f65beb512ffa4ce2d7a44903. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ESA092307125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe347dc0aa700d96937ce3da665c4d1f3eb6d9e4c65b66e4436a9505eb63b031. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ESA092307126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb3ab017cdcd5b77c387d9d849c364adf0cd547c63f3290b5a5b4a285f77a03. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ESA092307130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b34e0b8f2728efc268350b741241e490efc92b433dec34dcdd02785fa464b9e. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/ESA092307132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaed98d285f2b908dbc765ad19407573f8ba79f7d2eb6e9d5f9b3872d0e99bd9. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ESA092307134.