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 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 0x407dbce464be02d8817d09d1e2c4f542c564031291701fb017940fbc073aa6ae. 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/70433ad3-a19d-4a4a-8a7a-cc7ec95ef090.json and https://artists.proofprofile.net/proofs/artist/70433ad3-a19d-4a4a-8a7a-cc7ec95ef090.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 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 0x5def5cdbc380e1175747aeb8af0995cc7a543abeb249ddf5e13b8a18168bb48c. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:22:10Z), 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/USUYG1191662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfcba2ce5a53accc19e26079d5b078346ceb0e81346ce06bc00dc1d5dc413bc. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USUYG1276995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5be1598b96d59e83e2632271be7ad51ab7c0237eabddd9a3a3436bc82f237f. 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/USUYG1313219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023798810508cd2bf90fc743653974483d57afb9c8bc98618c5696a5c9c1dd7e. 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/USUYG1315756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9597fbe1830f2abe9c709a99176ade8f2745506fdf9242abfaa129534e72534e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USUYG1315757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04df77cb33802162022cd225438ecfeff2f17c64577ae2e7386c837d33522085. 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/USUYG1315758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c07147a3e34c4531fdb043c5ceb7a6a3839cd3bd98a0e4e0e5bd4d2394e7da. 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/USUYG1315759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad23a54eacb0aac79748481fddd5a19c7dc1ef6adf329e4b923a9f94c26c53bf. 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/ZA56E2101934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe524e42a12bdeabf666837f6cb00b7f9f28e390a41c03547ec4e3acfaab60ff. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ZA56E2101945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa875c08f124ac48efd57d827d8b327345657cdce62729b79697df0476543a030. 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/ZA56E2101935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1bd876994f70c0427ffb3add46987ef1b0e2b45a97910058245187b5a53f1c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:34:30Z), 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/ZA56E2101936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5115f01b88e6f238582348154419913df33f8b15c050f0d95bc004f318c60dbd. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ZA56E2101937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d2eb977256b93975270f2907f462ab75f1cf01a01d0dd46f639a3e75c409a4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZA56E2101938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0d84609fd4e3908cde66e75b20d0d1186c2b006034f283f56ca4a38181c6a3. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/ZA56E2101939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d8ba6288f6d1aa5f6ee8379150cdd3924e23eb3525abf4a2beaea5976bc53b. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/ZA56E2101940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201f55953161cd2680796ff292445f8ca82e6e3aaf0d9886d064d8e454c0a1b3. 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/ZA56E2101941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d3152783069e559c0a9c1f287fea7494f081f5b79c547c805e2f11d1b8a745. 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/ZA56E2101942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fe4458a003d3148cd5d36cf134b1d13f0577f15f58926ad884c19d0cf6ba72. 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/ZA56E2101943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6d530648e3daee66aaac793a27d7245d11c8cb34f2f417e5c8bbd9e018fee7a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/ZA56E2101944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f11df958b2d3b4c9b531f9016a505726ef12b84f932747aaf8eacd6eee1ee0d. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/ZA56E2101946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8028a672445bfa769ef2e80e1693ba6dde19ed3f490d38bf1780cb1df4c4df. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZA56E2101947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe524e42a12bdeabf666837f6cb00b7f9f28e390a41c03547ec4e3acfaab60ff. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZA56E2101945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23df90aeecdd759be6853164420859bc2a37ad79eaeef8b064a71c9f646ee6d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHZ62254149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41374a593ccb12789057c2056bf52317a671716729a53da009b2c35498c316f1. 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/QZGLM2333281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9ca74153cfc3d31742a31f78e4a7c40875c67ae4ab42e3c8773e1cefd4ef22. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZHN52357804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaade4835fd48c29d461523e2681e3c7bbdbf942a6e7aa9697319f37069f76a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZPLR2364670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ee1f979f78aea7e6115e054c3aa8d87347ace8ee643cc314612173c6537dae. 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/QZNWQ2333723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16fba9e3f5690538ae6ef7416ec9a7f0b2bcfba9bcb12a67c5a021426305a3a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZGLS2391160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cdd13d5aba4deb5a9a4ffa9d4518304fc0cf08fc65c01e9ec105d0e15eabb2e. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZPLR2364671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a8a0b51eb2fd1794c9de412af0539cd676b8b1d6ccafb04ea4808972e0b5ee. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZPLR2364672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620a985d0f82eb43ca3de265b8070719b866cf0c65d6a814d4ca226951841be4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZPLR2364673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093b6492ac9f7433b39767cd93119a2f670288387384a0033ae42bf9ba4d4263. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZTB22391569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff2435819a1f2816047e550fc0dbd8575b71061a400ede1d943cd6b55c7f076. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZWFQ2338995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022f17d67eb2ab17c582ec358dac0472dfd490c6a579ef152b9233725e143aef. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZDA72408626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff2435819a1f2816047e550fc0dbd8575b71061a400ede1d943cd6b55c7f076. 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/QZWFQ2338995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8a55f03671c56f74cd9c63e762e9cc7ee452fb6a3c77814a60637cd663bd0f. 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/QZDA72408627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a72a17dca619a001150128b023970642bf7c2dacfe08df13333dd3512e7b3b. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QZTAS2425400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b804965f7fda83c311c8cd39222163b19104f84d0bf36771e9b272f16031c5. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/GBLLT2437766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e460003127fb6684b3f440f6d7d9843c01d947e47c1788625426f6fa09fd62. 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/QZWFL2446556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b8217ea43b9da26786f52936231f9fc637c03e4b59f589556901a203234b8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ772427312.