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 0x667b00f44422cc3d92cc8abe57ec32658d1b9a8315110666687614b08da439ba. 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/e6097d92-6dd8-437c-818b-cd35a19ec907.json and https://artists.proofprofile.net/proofs/artist/e6097d92-6dd8-437c-818b-cd35a19ec907.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Taste of Food Is My Reason for Living
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 0x4f3126885ee874939e3f60b3caa5e7c66557b70657d173ec1608d0e2fcd1d1e2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB72281793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84403674f2bfb50bf5a829730f6c58421d2e1247edd38477cd66abfd25f221b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZTB72281797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992b805d8357373d41b412159b2106a4bf07ee7a70148ee50abb719245856344. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB72281799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d5968f80e3e37c1df951ba44ae3bbbf46b9308f31791a53ff8662634a22f5b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZTB72281800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1104a5756632f79160baa068e3be2763b8670550151283db7d7e802ab60c80. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB72281801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10600477a41974619e644128483264f91f8b8416ab6ff932bfb30fa393e3ce12. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTB62272604.
Born in the Datastream Die in the Datastream
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f05b7871be815e699178745dd80705a18509e8fbcc3db003ea7a745268381ce. 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/QZWFQ2368432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e0ab84f4377bb539ec024d856e59c67059c5bdfa34acbed04a172bfead1eb6. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:09:53Z), 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/QZWFQ2368437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49075e20a407609bd2490a9851b6c236e85d674d04282687defeb5ae8e099b8. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:32:37Z), 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/QZWFE2471902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf24530d3129d7e5c07bfb7b4bb760243dc4587b431f0ef92c7473678cf1489e. 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/GB8KE2056490.
Hardcore Will Never Die, and Neither WIll You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023c2007d8e8d854fd87ce4823767062e2344ade6b9350fde9463f3cbbdb012b. 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/QZWDE2313298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b712314602dd3b72674b34c1597e3f87087313c277bd82f50007acf950e1e7. 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/QZWV32495108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99404f08b88b995a8133082e72515af450842bb8479b47193d7366203f12fbf. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GB8KE2056489.
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 0xff3e1b94a5ba27f4e03dbd2648c060722a5790f5582026ccc34ab32adcebc4ea. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRDX62403840.