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 0x2bd0cfae6c6c06cb27562315e2f6f5a62ef3699472e80716a6234291357b4b8e. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b554a59b-43bd-474b-88ef-94e4b179c706.json and https://artists.proofprofile.net/proofs/artist/b554a59b-43bd-474b-88ef-94e4b179c706.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 0x14cee36af062f931502cfc5aecb07f84a8233660d6ec00fff77bc08eb6b7e1d2. 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/US4KC1170303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62a6c0628a3b335f0e413ea1f087663d5fb1b13de296e19e4185202f8786c43. 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/US4KC1170306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86fb5440ae99dede4e907d0d2099b1e12c550646c2acf94735854528fb3f0ebc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA82587110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc28b1688384b5ae93b3780000494c63307efc4a1a69fdb3a07fac46356a65f3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFM2415209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e742fe87db8ce974a424e3b53492b08e314f0a4fe287acc609c8bd7220c56a1. 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/QZDA42581440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd416e43c82b8da4f6ec1043df89b94b64cb3272667744a19aaa2d37099bddffa. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFU2433175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37127d2a45ca44f650f6c9d430f4f749df183945f3d8ece2de238ab26487dcf6. 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/QZDA82587111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9bf73ee0ebd327a018c764b283ead70d95cff8ae7ca4019a52bf9c76e90d93. 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/QZDA82587112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68380c8d39e31d37a2f453f62941d704f00c442e5acb1192c586f18e10aaed53. 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/QZDA82587113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e742fe87db8ce974a424e3b53492b08e314f0a4fe287acc609c8bd7220c56a1. 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/QZDA42581440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd416e43c82b8da4f6ec1043df89b94b64cb3272667744a19aaa2d37099bddffa. 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/QZWFU2433175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc28b1688384b5ae93b3780000494c63307efc4a1a69fdb3a07fac46356a65f3. 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/QZWFM2415209.