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 0x48bfa407321be533568ed3d45e9d6cec841db99f1b5f05dd61c0857489286c04. 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/31545228-a6a1-4623-9f49-40b7895edffb.json and https://artists.proofprofile.net/proofs/artist/31545228-a6a1-4623-9f49-40b7895edffb.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 0xd9f73a8aacd13a50e31b4cbc3fb9f5b863a33b1f31e2cc0558fd67d2adff8104. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZES61812797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928930e6cdbf722b2c26262c66700c0fa632723d226d3ce58bb0fc20d0e3215d. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZTAW2222818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3973d32528334577a13a681bb3b2afb7e6e6b8f4422fb78502447b13b4fac663. 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/SE5BU2340114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e650c31c546b91af26577d83ff3908a110f7c161a568e9d468435ffac7e7a0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/SE5752378040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56cd81191508d6b875f25b3975893aba823d1f9196088599b8eb359b73073317. 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/CA5KR2380292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186fab49ff85c16d5bf89bd4d630781689ca0cef262518b77d4beb54965ffcc5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKZGC2307235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b545ffafa0c41fc6f2a3d68ff0cd492fe089c715e0dc2365ffc995c8b632f2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/UKZGC2307496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f555a5e4ec94b80111b966b5a4842ab4f500a539acec0d617fa542a95721ac. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2394984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1af7db4d0299b6eefcc367c5125e99ab1f050f318d4a79fb5276384018d4100. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR2394986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda398342944b44acab80fd5ee86e0162d11ac528fd42e83b6f7e7a5cc52880d5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CA5KR2394985.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e091fe49f82a698458854363b65c8d5776b4d8704ff067c07dd925a3884ef65. 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/GBLV62307466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48182a2ed4773dd1f9d6e6c1a745552cae5d47af0b8dabbaaa44163d8f4e9c41. 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/SE6A92309983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeb3eae2d1580dbe803f279b3f4099d58469ff1a0397e51255893024b51e727. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6I32495899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cf52fb47732935449290124ebff335ac89e03b76b7b7da38c657f908436547. 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/SE6QE2415374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987c0ddd4cb0c1120a055a4b8f9d86824fce2d64fd8fe0cc6186f804c4163634. 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/SE5BU2466660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05411516faee5e0e8bbeba08609b81c88d5398731e9935973eb7210f248bde2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SE5BU2412028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98735b5e92d295a8d2d3d2ece82cb220fd86f591c40ec8fe94688951b2dab351. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN72432042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a762aa08fa95419347af5d6cf87f5889116583c7b63dfaa21f167eafa45c663. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/US3DF2438975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6f4a2e1488385190c675cdfe0532ea2bfa20e3455ff4db07149b5e4ecd1adc. 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/US3DF2457697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8790e41cbea38552b3fc4a98acc0baa28dee2b1096a599e593ba2476bd477c2. 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/UKZGC2309306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183ea712c94291b9ae51e7f47871d4ef22c5d29e0559c12173a7433c70930ad0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZTB22415572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183ea712c94291b9ae51e7f47871d4ef22c5d29e0559c12173a7433c70930ad0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTB22415572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ba85dd91a26639e68ee2bd982b0fc3b54add6551c059b8aa8e2ce3389dc9b8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHNC2436275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bed30a7d17368fd7aa0440ce038c9b758e1aa5f2e7477439898499fe41eaa5f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6I32315480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6896f6dba80459bac91a33b1f3b8965a75d64228d3ba08f066610c2e405f69e0. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:14:48Z), 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/QM4TX2488516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb47a746c765a44543a9c95e8cab7b49f75e64d616d252497c49a10f20edd16. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/UKZGC2307893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466b0a269dd768313e765b1ab9610f14f604e029c0f622b47c48969cb36ef5e7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE6HN2470476.