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 0x25afee93edab71516a3b70033cdb656611de65812d968f21a19e185befb3618e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cbaf7af-e28f-41f0-a327-cd07041c8f92.json and https://artists.proofprofile.net/proofs/artist/9cbaf7af-e28f-41f0-a327-cd07041c8f92.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 0x2272058d8cb7032a0184b95f8265a6c4d30bdfe3c42440eea086eb3e2ba7d943. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:41:12Z), 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/USSM10026799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe929b02aec74796baac96c18ed1a73d133f5f49e4f8d4aa9662c881a7678e1e2. 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/USSM10026552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698ef118fe301af945bb945ac7fa76648f07a4c5ef2bbb784b3e880e416ea9fd. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/USSM19700933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b03023da96d55ea1af07d421c8775954308b4f18baa86d712d5bfcd59e41976. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/USSM19700934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4a22b7349c128b1274d64fa3c8539b0bdbf2941d7f3b213dd9aa075bce8a46. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/USSM19700950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff7a46c83e99c6d4496b6cfa44673d984a87f256ad14d97551081b0ef035454. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:40:51Z), 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/USSM19700936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70dc9e96ce673291c62df98d4a0b506611a3e552c266fa51036332d4972e670. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:03:58Z), 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/USSM19700937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18ceabefeea8648bf10218a3aa023e0a6855302929246acbeb1a4db4729c8e9. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USSM19700939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39cf266be0597fd498bf159a70e7811afc7e6f3daaf67ae5ce137a22aa8b3d6. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:04:33Z), 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/USSM19700935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8328694497de8bfaec9e11b88c18ec81024f14cbdaa193c1ecdb15a06c9c13df. 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/USSM19700940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8186df27762ffdbd918c6e39881debfb05f39992890387a09f917b90b3947202. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USSM19700941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db346d05b638af9a19165519fd5ad359b13671648f0be7284825749bbfe295f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:23:41Z), 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/USSM19700942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9778995cea8f4fd37f83baab99040634417c4137d82e15fc2584a9bf669182b. 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/USSM19700943.