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 0xaa70bf24ef7a97fee7fee1ba198fc6c90d26fdc243d5861b22820a220770d556. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86c68758-4fcd-4abd-8897-4392760e4003.json and https://artists.proofprofile.net/proofs/artist/86c68758-4fcd-4abd-8897-4392760e4003.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 0x79ac5449ab6b863b8885c78582f4b452512aa681a88c254396b92e970f56d4a9. 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/ARHXW2002289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c26aac354c399e980d448779c2f8518c90871a9965810a23a9b2d41039db83. 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/ARHXW2002290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4a8766bd95f4045324b0e1a47fac316e7b8977f22730f129d9d2235a80d294. 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/ARHXW2002291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e2fa69d66d927952075bdb2a63e1be38d221383672cca9bffb5270a237ac25. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/ARHXW2002292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aaf6985a3e8a38239474714ae86465168188e3d573e3bc2115ec282e9de4b4f. 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/ARHXW2002293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fef9627c3a349d2b4443163d9424e158895149516b55f3bb7a30874a82baad0. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ARHXW2002294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d294f7d95c705bea44cf628ae3314c4f5b5efd3d4853b485d353c1cc42fcafa. 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/ARHXW2002295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352793fd74a40392f011160b69348b99a0e0bd5c145d3623fe52cdc1a3f070b7. 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/ARHXW2002296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6006f47438ac3585d1abbb750967d9416c2d96cfb317227ee6b86fa7bbb8d597. 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/ARHXW2002297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc20a1ae2d6cacd49cd985d093dc861032e0fb7e5f5f7a56f673922c98d7d1e1. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/ARHXW2002298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7e3b4c8cc9f2c575f06526d096598e7fb4b759d6570d2e732856c2cb514dd5. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/ARHXW2002299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caa2445597f72716dbeb0ea3e656565cb6435d6789b3adc09ae23b793d6289c. 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/GBLV62413177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952d937a8d9eec19f4cef9b15402b256147cc49d676768068f4d3b5150b80dd8. 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/GBLV62413178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a665871a11c59bc61abb0f2af01cc682a3b7661075be854b83597bc52f6d7cc. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/GBLV62413179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72906a44b2955915907fa49fb3f142c8e1ec1c4556fd6113ce58ad3daf28c38. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBLV62413180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff45cb1f489ab9d6da0955c37949d5c71d54ba85d8e7d4d11d1d115eaa5ba2e3. 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/GBLV62413182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6f3e6a31930ffc3d29975548903a5760f068fee11c5f13ee8530cd6efaa96d. 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/GBLV62413184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfe53e7617c84b2cdd8bdea8bb6d7d6c33e4ac5fe082faf373f048f54de17a8. 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/AR1ZB2500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8f51dcd551a2322bd02349bbad2fe01a41d1b79cdc9dbf8036e7b01948bf1b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/AR1ZB2500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9b8e087e8bff897206cbb0124e4dd811160317a4810ceefe39556fb011eead. 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/AR1ZB2500275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77d14eadfbf45e48aa0806bb55eb3d968a854ed26970df30547c68af916d6d6. 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/AR1ZB2500276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa1842229fa02397682f1d30824e49fbd67039090b4d0ea2a71c680b5b78a92. 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/AR1ZB2500277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7c5fd993b28daa8c766da2b1d2fa9ddedf55a5bb4cb56cc805ba27908d9ced. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/AR1ZB2500278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7c4995ca30d8c491dff7c81af1d1489eae910aaefcc77a627725cba111b809. 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/AR1ZB2500279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb959078511ce9dc91eb172796cb0d5098ea73f5684cab8cf3f52dbe14cf9493. 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/AR1ZB2500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13d2e38f9e0eb73be46eaf85e8a6ec3f42b9c4475fb5d034c71057986e6779d. 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/AR1ZB2500283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a2bd736e1a2bb40fc43d4257517dadffd8b753cdf29c960f3a5f5480b51b49. 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/AR1ZB2500281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd0693fa7d6ac11cd8d67f50b4b2709c679817b93437326927dedeb2ace9146. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/AR1ZB2500282.