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 0x4f2c2af22a602377447877d54188bfd719cd6026ad091522378939e65024dc0c. 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/55e5a3a1-9852-463f-9968-c8552b4beadc.json and https://artists.proofprofile.net/proofs/artist/55e5a3a1-9852-463f-9968-c8552b4beadc.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 0x42857240ce75eafa2c0c6766dec20a3958ab8a825fabb04b825ecaf41eb47116. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GXBNP2331599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee72c8fe28075d2c4dcc861ff573b9b580d0c94bd1ef7c113db0967567822b9c. 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/GBKQU2489664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b000addf222d19af0f2446b24d6795baa4629a68199b375443a159f9d52cc7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CA5KR2496774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b80bdb7794d0d556c5a0a5cbcaf59cf1d7b9148fcf2628572b82103806ac362. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GBKQU2507169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdff994edf53eb5a9f901852cffcc0b36c4d6dce8e745fdd07690920f3a2e76. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/GXBAV2063164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d0c009902fa65a03579428c81dde4b83fd387f257b9682c3c1be8d1bcb278. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT5M32556697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8495e08cb7a935f9f09eb8a6bdbe67b40d5ed17df273a3b7f4f480b2b3b04bcd. 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/QT5M32522618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305445fcf811957ae8b7869f3758299e06e9e9cf2252d4dbf84147641f7816b0. 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/QT5M32540192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9db62d4214e6fafa6adbcc69c3332d0b8f423f0d01f2074f70e7c053bc86d7b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT5M32581491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292dd0a981beed9e1fdfe4afb5860b7093e609ac1ddaf67129ca8c8c79e8d051. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:09:11Z), 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/QT5M32591166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01192a3c97af99d90f580f954a4fe6e00bb72117050ab15dc851f88a975c5e3e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2511134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3136af05c380284db47cb7d0f1623eb1c205ec2028934ff0b45a570eaedc7974. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2511135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f4e93c27cdd959d9688518246d1cff489a35447dda0eac99d3027a4c82b2bd. 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/CA5KR2511136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa268c0c8932d46f9825f987206b19b96be38034b84d6d321ad101db80f676e27. 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/CA5KR2511137.