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 0xb0afc06026d73b6c2f8133a089351df239ac014055ffa6093198bce2330dc373. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/883ccbdc-e323-4568-ae30-b2e06e5eb312.json and https://artists.proofprofile.net/proofs/artist/883ccbdc-e323-4568-ae30-b2e06e5eb312.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 0xd317b1ec17efc43f1552da147c5a31cd4fd700c63fc22133d4488c6c28c2a516. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:42:34Z), 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/ITDD01900346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f23fcb12d1e68cce8689b8effe39002698e13fe25f90037e755f377e5e4705. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITDD01900354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d4bc007f3c3cd1e006d74663ae07a9996d8827345062fe04bf3fa05daecd99. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:52:15Z), 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/ITDD00500860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2c77c5977bb67afb58fe04baa1d20028138a25704c24ee25912f3c72d52ece. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/CH6542342014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec34030cd262ca29500717d9f964c4a07c1f4c5ba04c2b6d5e244df1058c217. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CH6542383848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d3ede17a429839fc73ae2875137602e71d0b67a6d39d9c9491ae63280dd7bd. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/CH6542406144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d04bda60f6dae74923053b0d1f0ffd5c7dc764832f0e1d5ab35775af42ece2f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CH6542424942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290f89531e691218de55df1aabd1be6a61b95dc899dbacd46f6b655f842f6113. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CH6542531447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd87126ab9d952d21d597d903919d3288541fafc2d0bfd57db4e68660748f8b6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CH6542569517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5cac4a49e1ddcf09f5842c78e04e922ac1d138eb861186e397e40786941f5b. 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/CH6542571839.