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 0x268115cbc4c48c946e56002f758bb9081f027d54b708c88a855312d764f91425. 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/0294af57-23b7-49a9-b9e3-150909fd771d.json and https://artists.proofprofile.net/proofs/artist/0294af57-23b7-49a9-b9e3-150909fd771d.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 0xe9ee6e1ce5ca8735f038fd04086b0b13ddfc339c45728e5ff2d44be21171303b. 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/US39N2304429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f9f60490cfee785dcb9635e4e065c0a11f00d26b9b8de2fee78d048e27ab70. 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/FR96X2215992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc177bbb20450d93aedf11459a811748c5ccd9b75e065673161019740e493469. 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/CA5KR2254461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92101b143567b6eabd0d6a0c0f38e516663f722b5bcaa837297bcaafdfdbaa5c. 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/CA5KR2254462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fb9ccd8b97084ed217f6284e33baa35213ca2c3d5546f2bada05f84065cb78. 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/FRX762129664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6190d774de167599ccf081ed8d90ca0253d086fe14bb4d2ab22e6cf3e1adadc. 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/US39N2300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd993347e069101222bca38f99775e7758e7ce3342786bbc12bded225e715d15b. 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/FRX282150579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86209dc9105241acf5cae8de44f7d2aa48be0f894c340530945669c3667579bb. 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/US38Y2413404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340e954ace15797fbc75bec55efb9d6c068514a1b077dfb1532e892644ce14a5. 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/GB2LD2310162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1023de326575d2bb4fb51867e0968393c6e8e9487ddfecc26702800be48b08b. 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/GB2LD2310048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f1132533f6e2d884c57176400b460e6bd7f4144aba1b44218e1542a4f6ffd7. 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/UKG4K2200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b78e9ad2481c929a408bcf208d78ffcc28f5354c75c99b11444ba62e63ea3b. 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/QZTV32281399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afbfb4e043cd824798a082455703a37da262514973d0d49b470038c1fa42356. 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/BEN582200391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82a3a6cd79490b0022be4d8e6a505ef03798fb0669255669206304ae05de250. 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/GBRF52200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd5c146339e204e45506ece30dc9cae9d9e05891855f75005418a82f310701c. 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/AUMEV2214209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4584eb1fff094a7ed8cd593fe68818d1fc1e533daa896a1ae69319fe7e79d5f. 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/GB8KE2163917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915e3972f3934a4ddbc3f15c9204bcad6399378326144906fcdb5140d9f4b8c0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:01:05Z), 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/NLCK41096601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9601de4955357d8d448db16c782b2acb247cc719df218a69b2a9c7e76bb6e374. 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/GB2LD2110058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9841b9196a7e320ffb9b65540fe5f432ae1ca12a41f56daa7616534df0c0724. 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/GB2LD2310018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806cfc51d73d4248a71e77a81bb1253eb60c28fd31f0f2c59fa0a255a228e1c6. 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/GB2LD2310063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4129365646a24a65d164a34d4f0bf2dec7597e5518499a8a31cdcbb961b6aa0b. 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/GB2LD2310099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340e954ace15797fbc75bec55efb9d6c068514a1b077dfb1532e892644ce14a5. 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/GB2LD2310162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980178a75fe0f2343468bee98992bd1c10f1d56003c6157228b4ad4abe1e6e09. 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/GB2LD2310191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cced29659aae599e94f30a6f971f9ec390b112a35f85085c62c575073abc0f6. 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/CA5KR2289301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4031b2fa05e67422fc13aa1c1b4702410ff0cf990e3b86fb1ba3720b061cdf. 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/GB2LD2210252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d9b502e7dd3d6edbdb1c0f190dac966ec9460238c0e4bb32ce73ad9a4f12c2. 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/GB2LD2210254.