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 0x4033e16b88a0bea81157776b45046f199f52a8fc74d58f4fe17be494412c84cd. 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/771668b8-f2ac-4128-9e5b-4e8ec46d79d9.json and https://artists.proofprofile.net/proofs/artist/771668b8-f2ac-4128-9e5b-4e8ec46d79d9.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 0xb4d60a16a68c1759f75f7f686d21e20e8e096567e3f5986cc9080b8a206e18a7. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GX5MX2494030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b4c6f568ceefc721843ce6047b2cbfcd82e1910dff3300d881216d6bf2122ba. 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/GX4R52407873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3c6fe171af1b57cf10f2e602e31bba00c54e283649f909f9d6220fdab51161. 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/GX5MX2424093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366b0e426fdb97eff76845f23760ec59b7aca593fc38f19924f8b20d28dd5735. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GX4R52498218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bde52e76343b116104fe6535078b1f9ef70b94a06c545b6fc9dc93eff4005e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GX4R52416211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf370eb3573bdcbc44a41e1da5a2b335c66da901731efd40003a86d49d884a949. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GX5MX2470371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1a91bd05c1b9172e16bfa0827022ed0ec4c840a2092acb4e3ab781b0357546. 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/GX5MX2481260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111d203ab270e2251c176597c3a57352a6e5f2094fa5c98d96d944de8ef7e0a6. 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/GX4R52456840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc88282d655385bea70fe4dd719ab2d7fc2b739636c4b31a40d6edc31295d20fc. 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/GX4R52465611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07175d97dbc0552d1a3e4fd4e29b45960b01b3ffe2498d5513c34aad5b5b1e76. 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/GX4R52442910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e77a96672e217aa8a31d9e25ac26dc977db25047c5befa181eb909197728453. 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/GX5MY2451189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b69517169a3c150a4cd165577787c03ec9768022660033ddcc263cc1c94ab9. 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/GXBDS2448463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5974b5689d16f05630a01b51a40620ebae4e2cfe3332de137a61cf8b78fa70e7. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/GXBDS2427622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965358d6f4c88aa517ea2c8847be145bd64c67e0e2f35579b35fa5ee5a23c3a0. 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/GXBDS2498402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ef3640b96036f6ee47616f108b1a75887c10025cd157b3fd6b4d0cb6f08b77. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX5MX2403732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2087d95f8f80889640e363e7d82c36729046788ce138d880bef6264266525538. 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/GXBDS2490254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7098d0db34827de8b27cde17f45fb2b25dfbbb7adbbff7adeff3d06881c7b3. 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/GX5MX2493852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4124662165db469d8695f4644b8d348cc6005d1b428a0b0f1ec78eb3a7ba21a2. 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/GX5MX2426875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ccf60b3eaec21bed0c3344f405cbc261983df12860e59152bb0791296ae252. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GX38U2410971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6764c7046ef6c3ddf6ae32871b0ca34452dcbbae392d017f1e04bf83e441ac6. 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/GX38U2441915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc867b47f0a88859072a05136bf534c9389b680bd5ed25ceb20b2598868d390. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GX38U2439704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9a81ff15f2fccc688e8edaa0f69ffbca4790140891d2392a68707eaee27754. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GX38U2478174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828213997b245053f355e3803edad6fbeeb76647fdb9cef33fdd96c2a9f57d7e. 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/GX38U2417935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265a3dcfe766588a3f527fd068cbf7cb81c403a8df6a5b7320537be654f77586. 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/GX38U2440087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa323a549dc209c57e7e7f29800ecd981c35d6b1f187f71a5f4d30e6f2eb4d3. 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/GX38U2489171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c0074dbfee09a8f42a69a94f9b4e19b9ad6777711aa528d44ea7177551e6a6. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GX8LE2416877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8349f36357bee2342ccea8576c711e5ca80478d681ca2a2fef87e50ef94921b7. 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/GX8LE2430649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8b44e699245ed04786c1d059e1c5e52bc570269bead2a4244fcb639638647e. 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/GX8LE2452195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0fc4f92d16c4959b2df32481565b545b8b85d20b43a82375734b9e0ae232ce8. 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/GX8LE2417533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec396c044f10e66899970735f70304b448d7e56a8e54038d25ed3310e1b01db. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GX8LE2490635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2899d371beddfc954566ab041e2f7c32dff1884b413e6e104005f918717faf23. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/GX8LD2490335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5aea8cb23948e890065536b98efa107a91826cc3177aef608e08fb0c1a2b8b. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GX8LD2449982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f51ec81ddac366ccdb682a20ae0782b215a0b5ac8cb2405a91083242dad0de5. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/GX8KD2460657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0834570d0c97c2405b2a4e6415e6dbe750f80c8aed6ddffc19b9f5486da726cb. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GX89G2460300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09c2bff708511112edc22702bfc751dbc354a15415a622c661690c76cdc4d62. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GX5MY2337104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ad3fa57f6ebf25c5044fd8aea98732d01a988b46ab6fc8e4bb70a07435ae42. 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/GX5MY2390611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a369b6b0f75e0c9dcf83ee7131708255e74ab6a6752308c9ecd09aefbfa3da6. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GX5MY2398097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f85263d5a8e1de9380f2e4d0b422b1691f686b337afceef0223287905b5390d. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GX5MY2379334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc21f7b5da4f4af53a4940ae83ce770759f5b8d0793aa34484e1050db35109d3. 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/QZTAZ2453842.