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 0xc3eac9ac1cb2205ed7e02147dd93eb5ec83fa8aacba611b4e444b4f92e73755e. 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/b10c7733-078c-477b-8200-9e2143a18957.json and https://artists.proofprofile.net/proofs/artist/b10c7733-078c-477b-8200-9e2143a18957.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 0xd40aafd2f84461a99218fa4fa5898e08b346d5f05a66069b6c24522b36b1449a. 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/US3DF2244677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a82116bbbfa12ceebfaea02d83212163b78fcf22ecf11fe5805e12e5f7c50ad. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/GB8KE2209223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a438d7cb0f80c7b3aff3d11416f15753432c07361aa8ff270ccff304426c9a6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWV32326861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2ac772a575541e5c0ec545037a299bf4771127b197320e23dbc5b7e287ec43. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZDA82327769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe86539296faa4760e618b01b2e8a68e121a900a1f1bafd477d225af9bbac20. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTB82261605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b93f7c075e0127d1ac39b96410b695109b75b0bb4ba44563fee9f43a8d4a1f. 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/USLZJ2484611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621cf96c69e4fce7d22594e38b075eb0ee2324937b871f02ec2ea77f93bd9bb4. 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/USLZJ2484614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20db32e79d05dfe8754e72fa10638a5ad238c5b2652b79d869af03bb75bcebd9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM6P42495053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e023fd6ea223ae1614f829780310d103347ce31348fabf69e11d3c1c3c0a11. 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/GBKQU2465241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3d505df586812138fb0b0d4f2ce02f20db511994cc055ccbadd2a4abb5ab8b. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QMBZ92479390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0772284fa0d5f7d01c437a15a73c93064dd9737328e856a9e61890c03f1c8d6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBKQU2490106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27240da8bd77ff3734ab8dd9b30c1a34362358855f2829b73abc6449bb7ef9a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKQU2495247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3264044bb7d0bed455860311942eb12f029f818fe4f3b452ce6cc16dcedf1cd2. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBKQU2495246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af9eacae17d89d99d5e4cea2224da9178a072b99a118bd479737f011dd7bae0. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/PYC842503790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc549a63891472fe4fe6cf75cba215ccdb83bcac3f205916d9bf1f6826b9316d3. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/CA5KR2545972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca0f8305073fbedf23a5c46c3549d96d8d67b932b89cd68463724d8359cbfef. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QMFME2596498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a19b405759de0dfc54443043a1c96a14238a85d3d46f241ad35781f506663d. 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/GBKQU2423941.