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 0x0524d9ade26c760be116bbb6657e1144abae1b28b074b0d067dbf9cdb76bb6c4. 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/6b25e72e-319a-443f-bd99-d2e97c92a320.json and https://artists.proofprofile.net/proofs/artist/6b25e72e-319a-443f-bd99-d2e97c92a320.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 0xf6197a8cd8002594ea8311f6946f347704349486f440abef756feadd941ec5e2. 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/HKC631506191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7ef055bbc35e957343748e5f10f7e2a455cf5704aa11bd27107327fb22e1cb. 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/HKC631506176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a5f91e3c827ca98b6d6522d5435b90fcb1e51972498f5f570702e6a2b5c815. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HKC631506175.
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 0xcf4834ae743c6acc83db3b9478c5d1d35906e6397534d9d4d837288c7ce1eb7a. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/HKC631506202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ad962cb0ed1b9e41358268e1011e1e77f27e8393417b57e7f43814e7c8b508. 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/HKC630601709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c27048ef8e2fcc2c65cc7b2985446bb94f1330fc9af160ef8dbf8cc0e884da. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKC630601725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabaa695c58527258aa07ac3cb03fbfaa981c214e55be2ca5708ad3fecdb22e2. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/HKC630601708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d2ffbe4ea524deca7b7870e4fbc05f40a856500e22820338927c6900f376fb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWAN70360139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce29a594b8e37cf72a6e66d5dd42f88a9d0e9e4fe20f59c8495eab3fa4dbd6d6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAN70360140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1bdb18b2eee5e88871018629a78d220b9d1b250e2a3ddc862597726ee47d7e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWAN70360141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c3d03906bd4435b98a2e92fb762671395de86d7aa99b27f17c05d21e97a152. 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/TWAN70360143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b3facd2e0ca8eb2548d3dc518f153b90c570f400b5be88534b6e7ff98909eb. 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/TWAN70360144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360c0dbd65eb7b2c1dc4c75e8de9a79a19c0d556b994addafc1a108a253f46f7. 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/TWAN70360146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5854318092afd8ff343282c718d9e73726ac7a0233d4b7b8fb9908bb1cddd83. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWAN70360147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662495f3ab0a9a7924f8b9bb20b967d25ef7a5a02836872364b0cda4104cf632. 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/TWAN70360148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915f65bb44fa2c619469ad7f1140ae1d381c10b6a2439e9ac628888c334cc357. 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/TWAN70360149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb811f68f4a9d00d085312726e4f3a40f7ffbf1fe112159cd9d312a00a0c425c8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWAN70360152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fc266592900b999d31454f91c6b8fb7e92e6f0bdac48311ff4f9fd487ee2a6. 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/TWAN70360156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de773ba8099e545d75f940468bfb2a39c445726b0f538771dda6339f3c7766b. 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/TWAN70360157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765e171de5e90db7148a4a74a207a426d441559411fec7cd7a09dd6f09c5837e. 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/TWAN70360159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bfb267982113a8bfb7533e992be4220d1b570fa54e3b98590693786de1ecc8. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/TWAN70360161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891bf04746198fe2d35d94b832ae9c73197c81d7ea8f30b024988f32a11849ef. 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/TWAN70360164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90687f3db90c33b9c0725a6bf84b0424919977604480218bdd8984440586b2fa. 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/TWAN70360165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1a7621edfd6be240ce597863950f197949dff23790774e1bc195d4012b808e. 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/TWAN70360167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72040cc9e66e9d737fcfefe3a684fdc6a31d7b8934b358ca8abd585164423fe. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:49:38Z), 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/TWAN70360158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa28321b719cf5d0ab36e1735cc85fa95efebba49cea716dce696a1adbe08d65d. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/TWAN70360142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8b9b70195e148513b066abe24a4058be3347652ca1fa3366377c9defd9deb2. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/TWAN70360145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eed5f4e0abd2d535172bb987848dba7e80b988c012a187a03bd950e64df0736. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/TWAN70360150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfce534162ecd59ddca37e51b1584da1322715f4876e70ef524c34565cccfcf. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/TWAN70360151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad30f57522624a2c58478363d1089d21b59131074c889d3fe0e7c534da32a37. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWAN70360153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61cf2acd42d4ca3275af9da74180c9f4b80d384cc4d1c2a30a32af4c8e593fd7. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWAN70360154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f06185bf7f445dcacc63b99d72d88555bb4f5b035f949ed2ec9cea7a5e9676. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TWAN70360155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde840b4b127b068b00934833ae3c4a1481f7b0739f8ced15085f7c28ab68677. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TWAN70360170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2688577a36e639d0eed9dbaed3bda0d491b25f85ad30202feb912e773aea5059. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/TWAN70360160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fdd935ccde261aae38e14bec5baaae2bb56f4582ce0261daa6770e58482a8f. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/TWAN70360162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa02bba2885bbf3ba50d358e408df7921fe8ee46eadb3f1c5aa170925d36207. 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/TWAN70360163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08759abdc650060a9a15cb1a81be8332f9331f304194b8ef5bc8d9a0ac6c6dab. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TWAN70360166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb862ecdc79ed91dfe6e3a64435d35798e04224a6a3a58c16ced120884ed222c3. 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/TWAN70360168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2545da9df55dc7aecea2f7ffc8a7f9c8405c0c9c4bf1eda4ede5e4c5a0c2ad1b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TWAN70360169.