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 0x54fcb18cf8c95787b8a6429f94df8b34d0447eb1adf8ce293aed3104b11ac885. 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/71b61113-8e27-4602-9b9d-f8a59ddf8ac5.json and https://artists.proofprofile.net/proofs/artist/71b61113-8e27-4602-9b9d-f8a59ddf8ac5.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 0x6cb5a8218120d303a0272ce6543206f3034ad101912982a560fb35e25effe2cb. 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/DEQ121316002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea341667e3c230bd44a57fdc4ba73256ff3ddd5a3630701e6c12f21d81244dc2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ121316004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafae25ec68617e9e4eacff6749e06a64db693ae723168c746f036bd5944e477. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/DEQ121316006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b0385a6a1687ec8bac87339d20b272ae394830d878579fd66e84be1a7e8658. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEQ121316007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c926faf70e0f51917b77b02c1619c46fcedd9fb54da6fe456088ecbfb52816. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:08:51Z), 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/DEQ121316008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c78e634b13dc22b38c226b7feadc93d6d25bae74e3f44a66a64ba4d1bc7c007. 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/DEQ121316011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b3e64c95cd8d263477af016ff0ef1e9f03ff4ed71a358b8cb612f4292bb1a9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEQ121316018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6685697d1d5b2137468f581103241fce0ba0c4090e108d140d63ee0ec4aa83e6. 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/DEQ121316019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe254bd1a22c1a0df9433456aaddf7bae486fd8d0970586882f67a20d1a33e8ee. 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/DEQ121316067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf666adf5e492a4627fd9fd8619119a25a5158d9b4d06a36f745a5ea8538b3eae. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:17:38Z), 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/DEQ121416041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2973e12d203e07605e937e2b9631ceb5b69b2857b35c611f1bb926ced035cc8. 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/DEQ121416043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe93eabec68963d6d986344b7ef6f888be191bf52c478c56e783735b8f5f819. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:36:00Z), 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/DEQ121416049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef4783c7c45e1077fdd8805c8cd5f641eb7d749dc66fc794d71f4af6a8cef0b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEQ121416050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d362aa9507f9e3ea39ebc658b7d5f6234cd3dc022c811563c9ffc5263ab6a05. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:25:23Z), 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/FR96X1890366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95b4b2072d32e87b4a72d944aa4025c7f21fb906671cd251efd756749627140. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR10S1967796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8dd67680eacd8b25aabd81ef2b2fae28c9fa62da3b08e8581b83c9e758a20a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR10S2049156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ed9542d5930687ae5d5369047216a6b9b6731955afab4f2de3ef08beacb925e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEZC62189165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c77c7714f4a23a2b66aa9775ccfce3d765b6e0efd41fada1fa4ea7a05ec10a. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/DEZC62115805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3866bac8310486c642ac5509d4f93dc9d221a58110edab52d746872c6f14e38a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DENQ81300161.