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 0x0078dbbd3c2b68a118b1826b926af1463bbdda171e147a497a76de734f5f8f8e. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7bb2b44-6415-4c1b-894c-3efebaf6cc1d.json and https://artists.proofprofile.net/proofs/artist/b7bb2b44-6415-4c1b-894c-3efebaf6cc1d.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 0xc3e240acc94bede8918e1217c4cecbe2f81140a2c1d245ed0714443c856a890a. 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/GBSMU5781236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb262ff6b8b8d77371ac1d77eed3544792f98d21a174b8d1a8167074119df2266. 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/GBSMU5781242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c0c03877d6e20860f5ac2a4569ddb18eb4ccd1a5bd0d965ac33645e386ef375. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/GBSMU5781234.
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 0x1c23e99cc779be011b137b23fe5fe0c89f597e74c6f222456b1662d5dbf4ef15. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBSMU5781235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bdbef7807c2e45061f9bd9f151a88e88d13db7539fa4eb709befefdea37757. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/GBSMU5781237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e5b888edac95423043af1d94b879972f30ec1dc669b8514546851ec58841e6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBSMU5781239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3d3166245eded8a64d21029e09119f77a731b863d2d986b865c97d6da56bc8. 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/GBSMU5781244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88eadee49c6e9267d58cd4d6266b337e57c6b7d2309d28900dd081b1f134554d. 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/USLZJ2416842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94f151d5056daf701bf948226861461177925929dd50d196cb04775826e9b92. 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/USLZJ2416844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa399a0f77b79fe0a02329fd74af589804aa28e619f8c8600bd73ea404abd677c. 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/USLZJ2416857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e0d561e588980b58f239f80d80ee4d7f9139128b69445064b49374639526a7. 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/USLZJ2416859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f233440e006b1ccec515f66ade2a392c5187380899bf0513957bb4611bd7be4. 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/USLZJ2416865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481e4730417f6b7f7a7990607459f9a1a0edb38b50c438a5b904f160f07fea5a. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:00:07Z), 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/USLZJ2416860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03a07ad4f50c5bc4cf513cf5517d339c9764ee6e1536611378471449ce54064. 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/USLZJ2416840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aba1e56df20ad17942e1450c137b9ab1ed38067fe74c2fe87216f813152e8e. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/USLZJ2416846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6a3cb6dfa415c23a2e34d83aab07a428cabf30449bb658538e161c7d07d39d. 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/USLZJ2416848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3a1dab146d15da097a08246ed7741f18de2ad336c6b8dfdcdca74bcd628dd9. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USLZJ2416854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb8e56f28ddee93c88de836a9e1bbe33894685e88d5c0a46b299f1f4dcf8c60. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USLZJ2416856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x480ff3f6fb6656dc92280a8c7e21a7cd3e56f929f94fd0df2394572dce48ffe5. 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/USLZJ2416863.