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 0xfde4896e5a6230cbe3940c30364ae10f408d5e59a1482cc60af153b1957b5c0e. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9069fd9e-3838-490d-84f1-9a0f300f9452.json and https://artists.proofprofile.net/proofs/artist/9069fd9e-3838-490d-84f1-9a0f300f9452.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Anthony Bourdain: Parts Unknown (Music from the Original TV Series) Asia & Middle East
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 0xe144f4706a20f2567cc0465421219586482bcf6d38c1a4a4c29619299efd07f9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEEP81000814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9559821d2e31d10f2917f22b6c2623050059686299657c1baf0f4814634951b4. 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/DEEP81000815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b18171fa9937e7117e41302ad2ddf4bb1fa6825dae6709cbd6cab082fdef04. 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/DEEP81000823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3089547be319c0c0d1d5591ecf800fd3587d47702e3f4510804ad90e1f66c43. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEEP81000824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686f6c8bd58e23ee49637843caf417898196179ff04438cf29578883adc76397. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/DEB630001503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f82c39500fc7ce8475905356892b3ec2083a947e70d48c097fc264240556616. 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/DEB631001519.
Nature Studies, Vol. 12: Minimal Backdrops 2
Nature Studies, Vol. 11: Minimal Backdrops 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb39f6165111884114626fb9e7127b371888f08754ab1b75cbfae9fb98f6a183. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEB639801601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250c25efd4d09eea552edbb1081827f28e9eb6df8a894a818cb989fc272b1547. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEEP81001807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63e4b1e0f032187da05bb049cd54964ca10aa02a78bfa51bd4a4052a9087cdb. 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/DEB630505038.
Der Weg ist das Ziel (The Journey is the Reward), Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0e8cc619ddc017121dd5fed048b2c761e6ce1ed0ae8e1f68d685aff068d9fd. 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/DEB631003117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf1481cfa9a171b617738a3c136fef70a857bfc0afced35dc74f6ba137f1258. 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/DEB631004001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077086eeaa068481474ea5e1e6687653811d77fdea9a3c57cfe0656fb006eb64. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEB631578501.