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 0xa65f381709d4f2e2d33443108855ed164c819934c579af534d55a7d9dae9b4c4. 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/adf56d36-c09e-4e57-ad0f-0cdfe0663305.json and https://artists.proofprofile.net/proofs/artist/adf56d36-c09e-4e57-ad0f-0cdfe0663305.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 0x38d62cd2b428c1b8172abdcc792fa7ae6cc84ac97bc7c0285a230b7de1f6b12a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM82591172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a47f853158718750ad06e95db50ce773aed65fe55b9a84602b554c29496708b. 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/USHM82591173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5fed82e6f7234f92e86b3d8a1327f75aaeae96755aad6ef96a40526f713ffe4. 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/USHM82038541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c174b891ed62363914c86c1bd03061ec4cfafa0d6e8cbaaa2982f4b618270b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FR2X41624940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c174b891ed62363914c86c1bd03061ec4cfafa0d6e8cbaaa2982f4b618270b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR2X41624940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e2645ab9e0ea819a62a35ee6cf819878661b8b1d6ba764c6636d65ae7aea4e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USDY41977362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4564565ac171d0f7a8e8216693005240bbc216d1b8d27b37f34eaca285e524. 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/USDY42289858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044f34792dcecea77377d5116e6bdf2d167fd55e60468a7bd23d9f09c4628b84. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:40:21Z), 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/USHM82465785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e156bf79eca6ccf1c32ccdc872e9e7bc6e6d23fd87cc702a8e933490b0331ea. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USHM82465787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f116fa0868e32c41ae81296d5664ea14661df4fe466dce922226ce5c338238. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USHM82465783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d43675fdb621fe96f70644a41581f911a860fb4fd3728d846d0ff33c73eba2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:06:33Z), 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/USHM82465784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681ff555fe7700f5d5e51272d7161d0ee280bce76cd70ab759225eb0a404b5e9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM82465788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edd6eae841d661a19c475f4716c9ca41cb54aa93b69341a583958d907bf3cd1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:47:41Z), 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/USHM82465790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3220d8cf552c266549d69dae6b397d1f11cfb177251321d2ac0dc2d46a4bd87. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USCGH2319673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0159a106cf481edfad0709c4072c3602fc279803e94160f3644b492057bb1994. 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/USL4R2448868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc579279c81f14b0cbfc0c4ee71fddaacd96f3fff031c2afa2a4ea5759c7c2f6. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJZ2541568.