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 0x6094dd15e5fb5dff90f13f47ded5ce3ea62f4d7c1d187f5945b1ac8cedb1c76b. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c3a23b7-3e29-4b04-bfac-3ef8aff2426c.json and https://artists.proofprofile.net/proofs/artist/7c3a23b7-3e29-4b04-bfac-3ef8aff2426c.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 0xc29a190dd584ad2921504dbba06779ef0fb28355350d1eec3e148c4f6ed2479a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE6A92010101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b42df45935ef3f383cc8db209d5321741d58d45c97461777cd7759f6c837285. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE6A92010103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a665ae4c0208e66ba13d1f8758f19aeddc28fde2a67c04c4469d07ee704095. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:32:39Z), 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/SE6A92010106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816cd6c8ad961200e02efbe7c77c96220d11261245fd7ed85cdc7d8908ae82db. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:15:10Z), 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/SE6A92010109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa381e78abdc70bb258a86e36b30274430df1298b34d96c6bb9ed25a3ca56050d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE6HN2015351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04aed8fe2dbaf904bee183063f4db6b8d5159fa997698b68354051e7fe0f99a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/SE6HN2015257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229672083afeae095545f04f58472771004352695e6e9f5e3c6e705c6dc21778. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/SE6XW2182284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc998b00632824e1ebaab41f490032408f8bdea2ac600546e46d266387c19213. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE6XW2182285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f51d8d6dccaa537090cd7eb3666fe6d842c6a1cfb6a6974170d410142571e5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/SE6HN2156843.