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 0xba868fb4d6825968ac6ff2bc99b0991109bee00c44b06ebbe83e6601dc4e59a7. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84167004-b2ca-499e-9eed-28db6c48c890.json and https://artists.proofprofile.net/proofs/artist/84167004-b2ca-499e-9eed-28db6c48c890.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 0x012e561ecafd1d9b198ca284b901e4e05ce370f6531fd7a77a622d3cd276ddd0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:05:41Z), 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/USL4Q2052406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e15c15a93056babe9363184cfbd78a54ebd26ec0ae967f843612fab24f284c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4Q2052407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff9542fe74b8d5c23a5845b20c491961eeb7dbfa23b52b65b4556e8ea0e45d5. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:11:39Z), 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/USCGJ2216606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2939302a6dd30337addd1b80f05fc4bbbea044140a35720869714beee376a367. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/USCGJ2238785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3f1ac93e750af41804661d2c3f9f5ab41585f948e6f098350ef4ba45adf566. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/USHM92294546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7895ab46863c9d282014790589900f8a5c19cd41f3e701580812a67b126c078. 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/USCGH2304613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c631be138277333db13a74db09b6846895a75f9fdb3ef778d1a339de009119. 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/USHM92401147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec832cd039cc5ecef2849e46cbf6a9d2a23123c11ef40177a18a3b5ba80f1129. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:04:00Z), 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/USY242421800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5af32c87e5006b3984423f4a4d6d91250de8e63f2ee2a3f9c8c6cf553c430e. 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/USCGH2508177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a5ec2a9ace4d468cce704ba99529d586fc859c3ec30b5e9682225046253e7d. 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/USCGH2508178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b68b8984703b125654014e0bffa8f09cc08b845c9b0f1dd4980ca53738d068e. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/USCGH2508180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7d547dad22417ccf6688bed5309089fc521ca91473dd814531371001f2da20. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USCGH2508182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0d555178941a17d178394cfdd2affed01108f9a66360ca242a925fc18ea671. 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/ES47E2006884.