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 0x2dd380dc9f70040016c3076ef0543212687a2170e52d637ad4f80ff920d5470b. 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/c10b7eef-50bd-4a0d-937a-c576159cd896.json and https://artists.proofprofile.net/proofs/artist/c10b7eef-50bd-4a0d-937a-c576159cd896.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 0xefa551556be841115e1a881e95c934fef3f16e76ae60ecf0748aacc9478915ec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SKI541900109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1c9d3279f5184a0dfd1567a8f5e19d178d270a625150b82e63f3ea47519c14. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHO2391923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e98395445ef7c564a49ed74de8a069d6e64dae35a09d35887fc7cf52ede4ed2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAHO2389421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3511086c5155a948e92664307400f56b4ded95b4b41a2164a7dea3660d3e1bd1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHO2391749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484689820bbf84554bc0192df1e6fd81063f8646eec939674a6534cd926c4d08. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAHO2391833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709b2f6f7d11fd89b7dd8317427b0853da2e2dd88874cb8b5b2501d1cb3ac50a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHO2391857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23314efd46a251267936fad398a0d3377239c789b0845360433e72361d2c6559. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHO2391894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b06d45eab916826695976b0169ae622336e6a72b3048b705b1f1696dbb95da. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAHR2377024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b76772341a544c6224398fa1f2281bebabf321ba5c0c6c30d5039a3aca4711. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAHT2309748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b201727c623bef69afe311fa194919b18b90711b484322be91f2865fa45035. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAHX2468807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e52a9abedd3971ae2f18726e76b3c39898df8f37b5ddb5f477649a4963742d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIH2452085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43bc9fcb936987fc12352ae8e99bc3e1fa1245ebca841c471d84dadeaea6c75. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIL2486350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5055b1c5d692e149134fce25d6113f2faabd1b6a0cbd9eb86b0741badbc6dd2b. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/TCAIS2410901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829e3f6500b4db43c302f8cb02829bbff64685b6fd5cec721d6a17d886007445. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIW2419787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc9f4a737fcfd84ad81a8285845038e29d94547229e977f42be2c16c4ed4017. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/TCAJI2525410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5933df2ad30f845c01063c0ab005fa9ce213c73480f6d202b41487856148b43. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAJP2548922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407c38ef7454cfa4f48e32a38af97c2cb070f45f24b285e14161528ec17b05d2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USDHM2503892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c05219472f8f0f791e9ac13cdd6165e22cb520ffe60b4a38ab2495cd7a4caed. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT65W2509417.