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 0xf9d9adf629d727e48b1bd5641360adf00d893e8b0b9526a4200082cabda09d52. Chain 2 (Bitcoin): anchored in block 953721 (2026-06-15T01:12:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b89d85e-f1b5-4b1f-8cc8-d00819bb35d0.json and https://artists.proofprofile.net/proofs/artist/8b89d85e-f1b5-4b1f-8cc8-d00819bb35d0.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 0x38ad2225ac945991e9b7ac407679c30764574e6423114da69317beedc154129d. 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/USHM81816390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443376be74a2b082b44ae314fc8280fbb61c8b81ca4d090b34ea962d063469aa. 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/USHM81816391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6434738523bef75faa68de06ff338f945adbce097f8698b2fafa38f0becc7cb8. 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/USHM81816392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d146e42ff0265e5c2ff3d15203ae30ebe2c7375a2eea2d19f2098c4c1ed7276. 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/USHM81816393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30163f01c002fb0aad019fa15ed235578dce1112a7da7684d2bdd04f14d2861c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USHM81816394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660620d13ce745e56b32e24b68fb933783e15873080f40791badb6a87f411449. 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/USHM81816395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0192c0bc7ac07aa742f96ce6de5ccfc8bab7269b9817c0721a5d745d082ee25b. 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/USHM81816396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd80d465ac59d59d9f9b64902dfb675754d366ed159042cc32e56a6573c5adb. 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/USHM81816397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6c34354d0f29c24a2ccec83b0187bc14bd168dc0d497ad07c0c5f11ae7befe. 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/USHM81816398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec5324ec03d465c364acd649e2a51f4fcb34d4f61bc2fe73d0c63f2c28c3a654. 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/USHM81816399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e6757bbe35c7925cfc90becae58f53541c702c22332eb95b2d80be4d1e2029. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM81816400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45088fe0eb5487a34e8bb9d2f513fa537be7d21fe279f4220dca147eb5fa0be. 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/USHM81816401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b9e58102709dc310ed079f4780472f0848ba00ffa3d336f31b58e7361f6ee6. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/USHM81816402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979fbfe7b128c3c876d683787aff56469e19f8802aadb05c6d09508bbf70505d. 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/USHM81816403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f02b70b36d8d0443befb5664a89a4b2948fe3089095ae961e6c2813068de52. 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/USHM81816404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a45a8ca1b2b6429f489c6424681ce2dcab664ee9bc4af2da90e5ffd89fed3d1. 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/USHM81816405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351c3d96b9b4855dfa9e64d88a43613700d7cd76906cdffe3b7bbcbc67b3ab35. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/USHM81816406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa86398438e2cb1b6f907d508236f6aa8bbe2d0f028ae08e60970c90dc1a6a3c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZNJV2472605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13ab8c8bd3015035b47968b0d80adaf56c4a3881c8ac154b5378bc51bc2cc64. 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/QZTVM2319296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac4275d22ca80a223c657c1378a72de31302492a405635e2b69bf459893e5c9. 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/QZDA52241735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffe58196d51e2e61e5951686ce2b57f0a78bc2bc022e777a2f73e83526ac8f7. 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/QZPLR2265982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62463adf94da07eedd0b3233a3cbbcef21c54c53d0e1498f0422197433ff0276. 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/QZHN72317743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79df3a5139bb93ac1f0a05b14fac5f0502fcb3574a288ffaec0fa994f6b5eb7a. 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/QZHN52348224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bca1bbb92f19fd5defe2f19d864d7764070a564f3645ad27ab91cff388ffd70. 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/QZHN52348225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eab96ded0faddb5d2bb52ea6a3f5bc579fbb15633f5286b5fc64575c331b163. 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/QZPLR2397519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0ba04e5046d18cf156265d2061bf11d329e7e73111e5fa5e4d0589f6a70d20. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/NLRD52323274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de8601bb5bac658f0e0ff9e365d5b64e702842ad43ffd56019567a5f3c2f984. 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/QZK6F2119303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3632d85c11be809c2ded1dab148add2483a2660aab5f3f8158def2d2e3163d9. 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/QZK6N2557555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50fca3c0a7346cf3bc2d08bfc626df7f6e606079508e8c95b773c981b2747cb. 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/QZGLM2598875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6994e58672321e5470b195ccd19c74132ebde27ac4bad88daa4eefe052e8cea0. 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/US7VG2569477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cdf6c56aa556a8cc9a6bf4444acaeea13a8acde1e1e5877bbd4958619edee2. 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/QZTVM2487140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332032845125a337ac444566c181130f7dca5938024f87f8f97801c4adcff423. 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/QZTVM2487141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b12656d67910ad5ebccb470a8d6e36a9089b0a054503b6c23d5d3a041d790eb. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZNJZ2480560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062fda57c88349af30e3addcf1e76729523bd145a2fee8b3b00ca0c00f8d1c90. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/NLRD52323287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f63ab264883daa5a65c5775cbf80be7e698a1722f3eb337c15b9dd40b6269e5. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/NLRD52323256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb625aebbb129e0ba024c147900e5fadb5dca617ebe5f6d1080adc082143e6536. 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/QZK6P2232039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cb8b1bbb0538df8f43be59e039d56314769fae6139ef5ed289b733a695850b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZK6Q2154383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f195b625636215f6e3ac38b2a4e27526b025095cd18631344fec312e0a8276f. 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/NLRD52024431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a314b08b6c4ba3f3e2a0e0123b6e924af31745891d00fb98d30663daf14d91a. 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/QZHN72201434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d61df540c353b1a83b160f8a5e65104175f9fb2fb20e749c6b6b495d7d5bc60. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZNJX2444488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281fe5c01fc4a53e37914bd8e606832354ca5ed89c4ee71c7764be8056ad6e72. 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/QZTAT2340539.