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 0x51279d5f38385ec69f4c0fc85a192dbc85991f43bfd13c831a906489883c3e57. 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/0929cdb5-6549-447c-8096-ae5a33cef19b.json and https://artists.proofprofile.net/proofs/artist/0929cdb5-6549-447c-8096-ae5a33cef19b.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 0xd29234f538455543f6a168873f60ebd24c38c209ea3f1176711896be10ae781e. 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/ES71G2227637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aac4d8ffb9aa246cc7d6d544cbc3b954f338b522c29441a269e5bedece78d4c. 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/ES71G2227634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a4edcc9e89d760790b5ec26b04a3b094b4e2be631ebc3817520a429bdad36b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ES71G2227635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c559075a6cb519049c3e4f497840c43b2e984330643c6f5c30ccdd5fe81370. 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/ES71G2227633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ce1e50b7b8ececfdb7a61873cd7c965829cffb50f88a57707c97042a1e4739. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:57Z), 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/ES71G2227636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef8d7576e91ec32c37b29e2b3a3395da6d37a0ebbe3e7c6853dca3a7ea1ba10. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/ES71G2227638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fc510c71d8587cef55b94924fb7da988b16d36c399bb9643f53b9088cc9224. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:02:44Z), 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/ES71G2227639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77608667615ee1288b2b8bfe8b13d8fdb1ebbe4845bfa4acdf1bba7a1b21bb15. 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/ES71G2227640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5099e376a36cb7cff4754fe806d440439f5c99b43be15d653b8b176e85d5cc67. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/ES71G2228231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc088b3365f1e0cb5b1586e801a3d8fbf3a537135052a6e3252934581b483856e. 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/ES71G2228233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd751650a55b82e259a3e2705f99f0ac6433dbf413d980072c406ea5f9f7d0a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES71G2228232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e63a96dc57eae4d7cfb512592135c8dd4422e93ff991e19bb1066ae5a9d655d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/ES71G2228234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00c4c63555fc26972cf4a92814b5a3fa0d24d523e36df3a49d3c83da1e5e89a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ES71G2228237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cce9f86914d2c31dbacba5518aadefc15ded26e58ea54536cae075dee9480c. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ES71G2228238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba682016dd73e90378c678080538274d65b4abdb357bbe5b58388304d84e7115. 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/ES71G2228239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82746b26b47bded9ce1a2473eea764539e447bcb1048e0cb4d05ecf6ff2a6558. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/ES71G2228242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7af7db179ffa2041ff55f3ad3691caeab7566017ff2538da38cb24dff1cc4e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/ES71G2228243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7d08b1dd24e615fea0c921f243b8464fd5517fe1342a2d2fe137caf1a3ea11. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/ES71G2228241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eaf93def4cc0d0af529a9bdd4e782b4492a903430581ef09b5b06cad6f5d85. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:29:11Z), 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/ES71G2228244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ccfa30bab82663466a58ef78c1c2d4da7979ac50f42d9686e1f1fccf188981. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES71G2228246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fd82586ade37d6ce88d19fd21c08f813098872029f660b48177736e69d19f2. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:28:00Z), 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/ES71G2228247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba27baed8fcdf3d147416457e0f44a5cc0614a0bd8401af7dc76e6b00eac849. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/ES71G2228248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cadb07df2e68c72884641ca130e25086875fd7d7766c2923e1573c13b8bb967. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/ES71G2228249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28ca05beffc7a12d3717e4e5b20cf44be0dec2a94805ea8187b1e3116bbcdf2. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:45:14Z), 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/ES71G2228251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b32cbcbd0bc7ca9a7e1c00d8ae4d2c948ed2b34c37016c35cfeec5f4a3ad14. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ES71G2228252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ab6fdc21a6892f81159cb0c8ce02c982cb5af9ba5d54db49d0616469bd85af. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ES71G2228253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ffcd7e6617ef73188d841fde0094fbf66b36c8cd4d4f0a4d6cffe50b6923b5. 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/ES71G2228254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e5042bca52d005466a4cdd54132191d52433e2c56ff1bad94aaaa28cfcf50e. 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/ES71G2336171.
Hickory Dickory Dock - Slowed & Reverbed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955e1d5a6988b4ea555b4ce993e51dda6dcdf53072cb0f535096560bc74c819d. 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/ES71G2336168.
Home, Home on the Range - Slowed & Reverbed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb8f8e8276a9a130062b9e057ea0b6ff057ae560ba42a27613f5e63dad475f2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:55Z), 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/ES71G2336169.
One, Two, Three, Four, Five - Slowed & Reverbed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98edaae3c9c66ba6f532874fba668b59ed586168e7f0c59d90c51ecd91a6823d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/ES71G2336172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692a3ab791409fce40f51565cea7c973d30d3a26fb1158d2a38adb2bcade9fc4. 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/ES71G2336173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944c0841274ecc7ed54f6d8b257ba6d8b416b630c08793afd53d93ded2bec47b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ES71G2336167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a524396b19d8fbfc58791658998cda22842ccc70af4ba22aeffb0d4edee2df. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/ES71G2336170.
Polly Put the Kettle On - Slowed & Reverbed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45c0acae7e8f61ece8e53e5f5f21b57d6d7d58c323d2a81af200bc0f34500ba. 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/ES71G2336174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6d71c54e2b76828f2c058270de58ee205e19d200d9bcb15a4e3bd3d29e9cc1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:45Z), 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/ES71G2336175.
The Grand Old Duke of York - Slowed & Reverbed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986d99a9cd0fedcdc6cccfdb667b17b56496e795758ddefb7c6e4551fbc13502. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/ES71G2336176.
Pretty Polly Perkins of Paddington Green
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x952dcbc1d07f851a15d63a3775df9ac80d836dffb41dabefe0c42e96e2a5bf4d. 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/ES71G2416727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bb2971bdcdfc46bc94d3501250de947d2e8e56ca513d742e6c5a511e5892be. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ES71G2416729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7397f93ef6d6b29be705ea3445777a5bb6e6d8402d0e1dc91dd23c754fd692db. 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/ES71G2416728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3037ecc019a7166742d3159dfe7d962a38aec343a8fcb6d5b7a83e383085ac9f. 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/ES71G2416741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cf97eb549347cb3a39a2ba8c00a53d027cc3277685f6b2a4c528fcd541a98a. 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/ES71G2416742.