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 0xe2f8626dbfd9affef814a803a72d193ea923ef0e6963c484a4f5f9fbcd63a766. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec6b32c9-5f44-4fe3-a901-d886e8cec586.json and https://artists.proofprofile.net/proofs/artist/ec6b32c9-5f44-4fe3-a901-d886e8cec586.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 0xc26e574a8758e3b323a1ec59e897e33d778767501db85dfa401210dbaf6893f3. 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/TWK870700102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd230962138148ee881c619bbebeb091541be5487d3ab2bd2b41b757d94d59eba. 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/TWK871200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768bdf38e87286f4bd53916f52c897d9a042e9b4a5b377506185e94bfee10d69. 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/TWK871200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb571d75c52d47604246db9ca1d2530a61a9c7d3d1ee0383b7ff25d139d351d6. 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/TWK871100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6657f123b147bec8d6da7b109489019b576062bbb331b37a3cd7dd350c7599. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TWK871100109.
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 0x341a38a5b42ec252e076b5a9be09d41df8603fe295e8c5c23e2e73e462691f91. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T15:10:31Z), 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/TWK871500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0e6a2c90f6048bd6926c252c8e860596c37e4f9c324fb2d7c74c44235e6f27. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:51:42Z), 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/TWK871500104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe035d8b80d634012701eacb48267da27723f5056288e970f52fd6c4cf56261. 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/TWK871300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c9d8afbaebd65fa84c462ecf27ad418dd8ef557243e1c359a7092930e1797b. 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/TWK871300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51f49b00c035ed7a9bddda8784129533c19ca822706c3c7a5515cb1e9a1f23d. 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/TWK871300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d523738c92bfa98d64e593445cf375bdaee5309044c19ac485e932dd1217a9. 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/TWK870900301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88af8a2acd83768f2c34de77b4a7b752ca4dd7e748a807afffe55d6b4de8bc7b. 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/TWK870900306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6efe853e42d1e494542bce9352ba46bbffc221c88d881418f305110639dfb4. 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/TWK870900307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad6d505ac7327522a6e085aafc7c93f873d14810dbf443e0852776a740ab469. 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/TWK870800403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9212a961241c58b61dc81d9debe5b1b0a0eab8def2f66cb0d07ab4bd7a06c0f5. 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/TWK870700203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9026b10e4ce9660d2d7a796722ca54eca679d7f4107f1e850b51848a9c61f798. 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/TWK871200306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1736c6c58702fbdd23704c3133115b16136fe3960cd4695e29778d397d737d. 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/TWK871200307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cb9aab93c58c678f433b02b938738188446b929fc29cbcb8e0549e728a0a53. 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/TWK871200308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d16ca18288b1d43e6fa43ed2420670d46a3120695d2689c3e8e1bafca56c08. 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/TWK871200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b92820bbd85b8324ea2503afc9127d82c5ddc20e59609f704a345af6502fd7. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/TWK871200302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59de57c5007157442fe8268d248acfdf6b0575d7afc7565bf9daf5f9a860718b. 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/TWK871400105.