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 0xf98015f56721f057215ce7193758b1a62cdb5b6875bbce14b93c0a04eebf209b. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c12b1e6a-f7a0-4a8f-85be-bfe2e26ff42a.json and https://artists.proofprofile.net/proofs/artist/c12b1e6a-f7a0-4a8f-85be-bfe2e26ff42a.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 0x07da649f7e3a0ac24fd2399b739cab114b01ef6441e432fe6a10f5f2c27ebd60. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USX9P2327663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437074e8caca7df71069e4c655463f824a751f0a8605b0c997627c966f66b4b8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USX9P2327664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bf4edcd4f82a2e2c7b1b441ad41bfb0b9eb31e4239da41778447f09f634dc8. 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/USX9P2327665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e55081093ca6d1cac0889aec20fd0a445d3a9759639b5c9f5a7411945314a4. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USX9P2327667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd35c524f5c48fa9068bd77e08a4f492da67d9616bacfa508c324c41a8695cd. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/USX9P2327668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdec5295f9543d7219bd7a466fd989f156be8bd685984906e3f81b4292b6eded. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USX9P2327669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72caeef3f1c7fc4999e8640bf54f6b0463a31217142cd88541d68fd7bf7f37f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:41:26Z), 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/USX9P2327671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3159afc7a9ec3b79be215a7ef83478f779ce855330dc82f84501f3fccab502d. 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/USX9P2327672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b2677f7e692d71872ae15f27d4a2b60e4825aee5b9837cacf1905d0f7ae2b2. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/USHM92435059.