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 0xb102176a7183786e35d79bdfcbb2253cd6b96e88bf4d104d969a105aa1b42cb2. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/107c62be-f93b-43c9-889c-e8808c6d922f.json and https://artists.proofprofile.net/proofs/artist/107c62be-f93b-43c9-889c-e8808c6d922f.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 0xc70fa93c3ae6d361cab46e48037c0ab02f877169c6209beabfedce230515ac18. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/RUA1D1927262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d00be6d84623dc79f0b9a337c77b98a9a27f4bf44deb9f7eb87685b853025c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:21Z), 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/RUA1D1927264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd71051941943b4458b0a0db271df18418c53cefec2f2f44dd504981556202a5. 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/RUA1D2037090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad998f5f17a9ebbfa1d13e319d2c49c1b265917659a37fedd539ec0eeddca15. 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/RUA1D2037093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8508e54f9d99c29fb6e776b3d8bd5e8f8c2aabd2f65131825019fe6f066393f2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/RUA1D2037096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c72b2f0ebdfe3c583e6ce9f3529cd6cdf87b027bac6fd374768cc3aff66eae. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/RUA1D2133044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddd85bfdc05bbd577d26d7df273b508d961d9d7c74fa6fe1f9d31f704dcf229. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR59R2496393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9618771543fe54134a364b90f06b4d1e0969576b2ed8a469876059e66cd16fba. 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/DGA0T2405461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49bfa4b01f3b83ecff97f9bcf63134e33198aa5f92761784aa0e4f7a81ddeaf0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR2X42524603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48593d853921501010e8c64c034782e76ea5332880bf01ea90b5444f6caa8c4. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:44:31Z), 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/FR59R2528740.