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 0xc8fb312be9839478d900e12917b8ecd254483b76b623cccf0c2708709569ffda. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b810a99-b880-48b4-b11f-a8048327aa28.json and https://artists.proofprofile.net/proofs/artist/5b810a99-b880-48b4-b11f-a8048327aa28.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 0x2709b4495572aca2f54d324ad0925e04fc32f309c6010782ba9af975c8cf31e6. 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/SE4U50800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfa455d65139d0b40931e7ba6f1c99283a24c79e2aca29171c209862705553b. 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/SE4U50800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf894d67c6abf3038c7f19f44310337d24fa581f8881d789654e804da6dd1b013. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:03:57Z), 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/SE4U50800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdae8d6cb93189ddd7f5af35d5b8c217f56f298ff829b6d303c4072083ba994b. 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/SE4U50800105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d722c2af9b0988a122a79cd298ae8c7555a2959dc2a753e4cab501e93bd815. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USERN1000269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d629e8d395fd4bdd830a6be2615d36410837325179d3119433a5dfa8a9ba5b6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:55:48Z), 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/USERN1000270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76996c8c51e955f15b0e02b15a42901cd64d1e8dbefd2bb77e9eeab1462d98bb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USERN1000271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d63c377d6d5c27b6cc5dae993760c66129988b3ae9eed2486f0d572802b0d76. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USERN1000272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc097e12cdbc8f6cf63eee05c24b084aacee351109cd6bc92a753f669355533e6. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USERN1000273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd804fd51197d37cd9b9f89bf0edc8af483a6c5749390f17a29d21a5ae9834552. 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/USERN1000274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21124baae3394ade4a18555189fa598ad38395ac33028bb25a0b538840e644d3. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USERN1000275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c69d76b93617572184bb8dc9ea6796cb8c16902897c341e6a0e7c50b427b7a3. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USERN1000277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf382d368dc8ded4531e3bbb64fbcc1261a19c7d30bc244f05d245e77ded92641. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T06:56:36Z), 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/USERN1000278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bc0cd5789941114c454f5449c1c7fe00d070ea708ab6c892e45d61a416bf3c. 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/USERN1000279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc8f617249371a2153b0efdcf4177a81fcdb9d27fbf409c3e0f3bc107e09227. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USERN1000412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba43891364245bad44b24edafd945821b30005be6fd34d40fbc1f8670f29769. 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/USERN1000413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a870b87efc66a977f52b6d78d69206987cc163dc54ec4178e80f3db2d7c52d1. Chain 2 (Bitcoin): anchored in block 956485 (2026-07-03T10:53:04Z), 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/USERN1000414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e1c25c7df0e93265d4309b33085514f05c074d111f2515ba0464079b6442e7. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USERN1000415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d088633bac358171c6d467650e444f41ba3148b03ed83b4c8a2fdae32c2695. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/USERN1000416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69fe5347fd1ede36c1cf2153e2b8e641e57a4bb046a8bee5e22eaa25a6fba86. 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/USERN1000417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a46d9a43a4c6159c7326d5b3d961cf1215069130ab743de34c5fa26bf2960e8. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/USERN1000419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091dc3e9be84d8a7e1d3f9ed08cbad826a03a7d322692ac1f0f0bba0ed905cc6. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/USERN1000420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7456052facad310041dce5700fe0b2290fbc1a7042cf1d3c2df77e17776350. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:04:06Z), 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/GBLPF6734806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5514e6129aea10c8ecec3c5d0efd3264e8befae78f63b88431f7fe605b01069b. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:51:43Z), 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/GBLPF6734808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f5f64de45ea3b7852dbc9f01b6b7893b085944ec723aac79928582b3a62ecb. 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/GBLPF6734809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3c358baf19603bc9cc73b25a0daf5bc55e430f453df4428e3c78548f7b55f2. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:58:01Z), 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/GBLPF6734810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c385f971922b87dfe46551e0d0fb4739bd0f36fc98836c99ceee00b63a32da. 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/GBLPF6734812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614367ad360d692e00360a4275241e23c53b05e6fcdd03aee9218b8578c4d1f1. 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/GBLPF6734816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56ac82370a9100550f9348883a48e1d74f1d72411cb7dc1d360e4e3665c48e3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:52:29Z), 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/CALB81283801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40ba2fdcb76d7c50a473be459efc40e186e56b6f72fbb6e4d40dd50b857408a. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/CALB81283802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d69b6847a36330593ee6d3c4c79635816fd96d379ce10eedfe5e5b22d10729. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CALB81283804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b235be0977c38e7e9025b8461ec23a3ee375bb31f92193f8d9cf03a47cda67. 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/USY252315791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25695ec7ec16275dcba52fe26500bbf63a62489bb15369a3493a31d44cd90d2a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USY252315793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487d02b9a0b35576fd43e495c5764418291a929454fad3b890efc3a619d5c79f. 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/USY252315794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e43c7433da57cc90b04b191367ea9455b288b619b0576375050aecdb7f3a6e2. 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/USY252315795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bf0e3fae3f878de3b48d93e0ae347972a2ed59960a5663b21700e23392076c. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USY252315796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea29ae36723bd8013624eccf62964db0983b74bd373cb78339c95a1fa4cf836. 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/USY252315798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9a8ac64d47ac345b4c651b2995b94b856a64dca1bb77704580677bf0f5ce12. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:20Z), 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/USY252315799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a205cf07988d3c17bf7cb8764316f14ff27b38e58d9d00defa94426eeb787be. 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/USY252315801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e660d7be8560daaa50d13443b2456ded2733ee7fd55fc04e67e1b200cfe87e1. 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/TCAHY2409383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbcfe961684f6555406e2b8bc7ed08ced76dcb6b9478d12d4af080e9b8866e4. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCAID2418333.