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 0x2223b8638c9e0473487fd9b9c0d3972212fe6520ac30c465546530762afa4683. 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/07250804-eb53-4f0b-9449-048122cbbc89.json and https://artists.proofprofile.net/proofs/artist/07250804-eb53-4f0b-9449-048122cbbc89.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 0x287ca29ce8c7043590cde21e44cbf9fd090b85ebd9b7292199997eb88f72c64b. 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/QZFYX2287447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f77ce85c9dd89694aedb63b259936ca1f021e7b55b4fd705bb19720e7575ec. 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/QZNWX2138794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfacbac7e3a9ea78d0c077779a901ffadb516d14a7527e384b565f33b36d2b4. 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/QZPLS2149171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2cacba02680b3f933261f275626d60abeafcec169820c9199752133e75af4c. 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/QZFYX2287448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ecc8c255972fb04c55ac5e7199625740f11c296fbba0b1113ac8013d4a810f. 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/QZFYX2287449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d155726eba0f3020a551f8e2845cca1b501d2fe09de5864b0a870ff3cf61e9. 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/QZFYX2287451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef298da9da6367ee3b9305ad075122d4c4486f9bc914ab0c24ed31dd4d3f9c2. 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/QZFYX2287452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9377404ab02ee6a8648044805e1189c42ac8ce4b9e700ec464d0ab0855ea21d7. 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/QZK6P2438209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25fc672dec032fc1f36491e5df25e32f6723062f89dab8e95d725b87e15593e. 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/QZES82413633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25fc672dec032fc1f36491e5df25e32f6723062f89dab8e95d725b87e15593e. 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/QZES82413633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e3d167c9c26d7186035408c2e8b1bd63cd42a3643d7bc350145c499d6219fd. 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/QZK6F2357984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54390ad92b4e7bc97dd7bd0c8df2a7e01aed7dc05cc635ed76396fba88229665. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFZ32345035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce3e032d17eb1761e3ea33ed10d408c6a7ee4eb62b045ad98d04af9818155ba. 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/QZTB32209331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8372e6d735ebe0df66a95c4488d5aa39aeface6b0bfc9d7b3f404e8ae798f615. 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/QZMEQ2299801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eef287b07ee9f6c0dff09a01a28b8dfdc535b41e7969879ba879cacfb638dc3. 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/QZES72246924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9bb016027cb680b69e0589f7e1f4a3458f6f66f587971f9a0bf05d2f1ef30e. 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/QZMHK2277626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82d68ad78141fb24d1fe0ade4601e4cddd50e3dac8df651281f95a6b17fceed. 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/QZDA62241697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfacbac7e3a9ea78d0c077779a901ffadb516d14a7527e384b565f33b36d2b4. 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/QZPLS2149171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f77ce85c9dd89694aedb63b259936ca1f021e7b55b4fd705bb19720e7575ec. 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/QZNWX2138794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37aab836b0f04cedbeeb61533f278b54ae8e11e1df479a77b087e10306c8837. 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/QZNWU2114020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1f6b3f647933afd5358eb2b6a57840aeeabafe97c27234b2d67f1837c6cddd. 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/QZMER2130482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1956c831ddedba7450edb8278f01aff5241279607a8fb21485ef18d8c667a77. 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/QZMEM2151150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469afb4f5fbc3e04959f4f65c9e709e29d339513e01c8216f3b68edc44ac3a48. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZK6N2160748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8af85a1f035e54a485e82a6411d53a87b087d9a417f54cbcef2d7413f74d92. 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/QZHNB2108567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e55b6b307e320cd13c53b32380eb729d791b799117afd3098ba7b0e55047b65. 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/QZHN82134333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55962626ced734ca7ef28c3902fa6e65f00d95068dd23f1f824ac7ebf1dd1953. 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/QZHN62175124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7dd329857d6bca509e9f37ac0fd755998321a855e864ad1cf17236fe698b25. 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/QZHN42150584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6997b8ea4286a1260d27c703be6d537e73d169ffb87f85bd246ec62821b0e31f. 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/QZDA82197761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a225ac0edd29e93e04f9a1753efcad8c28684a673651849b39d5bd60a46e19. 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/QZNWS2032770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6473c23472534b3d27d448df346ed95fc92f70a363d46f9cca6d32fd5cd880f9. 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/QZMEN2026132.