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 0xc974e8e3add561f26dfb8517194460ad7f71380b2f4593fbaa4391c1e766b3cf. 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/e8b235b4-a27b-45fc-b59b-c59cf3d524f3.json and https://artists.proofprofile.net/proofs/artist/e8b235b4-a27b-45fc-b59b-c59cf3d524f3.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 0x59e2cad5eb8414b712e66c7b747edfed98004d2682428f34eba32cdadfdd2a32. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:50:36Z), 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/USUM71002959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff360a3edab6c5964f8c361a94c206418514ad30e3162fad22f06fcb8b8c00f2. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USUM71002962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe496c244fb02f905bb0035f6fc5443440d53edce773fa23d291309eb20d4f553. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:06:40Z), 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/USUM71002963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed40e13c231589fd4cbc5f8c685789ab7ba2da4f3db9ef85628f0bd0ad3d2e5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USUM71002965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe246eabbd3042b96e219491474c09b58c74406eebb4f1831480a830c0eac1d6a. 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/USMC18622051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd989e3cdbb63f7fb5d1837d5426849d3bcadd1c00c76e36291747969d85762ac. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:35:45Z), 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/USUM71003174.