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 0xf980e511b2a47cb2aa99d802c59a3a61e5bae76432651ec3e76c6c8d6c688f02. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fce5f2e-9dc0-4373-99e2-d90ee681c155.json and https://artists.proofprofile.net/proofs/artist/7fce5f2e-9dc0-4373-99e2-d90ee681c155.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 0x9a55e834bc92d375f7e1d9b01ca166a9d40f00858800568877064f70923b7689. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/CA5KR2380118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc5e21dbef9a11d36c8076985488cfd3dcc4dbd7f8da80aee00533b7ee4dacd. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/CA5KR2402615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92307588d5e5f74107cb50d987b5aac996e65b46f7a91e0b6ffd55a1dfd48b3. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CA5KR2416984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92307588d5e5f74107cb50d987b5aac996e65b46f7a91e0b6ffd55a1dfd48b3. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/CA5KR2416984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9553704e10cc7d2459de9f259b06786936f69d23b593d316c42334df6a22716. 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/CA5KR2431737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9553704e10cc7d2459de9f259b06786936f69d23b593d316c42334df6a22716. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:18Z), 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/CA5KR2431737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4516c4234f35f1f98b172cc5c38203c7629021b65a4b0e909e6fb5c457547de. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/CA5KR2462886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba2f451c78362a2d83cec6e01f1d4867070cd9e9e52d769164495e493b4d8e8. 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/CA5KR2498875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7955ee8a3e3f20160acbc33d48cc1a5dd7c5da7c8de34f20863c8b428d300f4. 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/CA5KR2517715.