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 0x6fa75286cf45a700cf7ffbc50dc9f46f9e274da6e1127784012508e05fd0daf6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b191ca4-5f2d-4eea-af47-57deecd8e4eb.json and https://artists.proofprofile.net/proofs/artist/8b191ca4-5f2d-4eea-af47-57deecd8e4eb.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 0x5835fbd1ad5a1468b2f3eb677d09afb14ed78f67923d8dff1a11317781216dd9. 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/QM6P41515565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefc3a5ee8033644810a2c00bea6e86c438f247474125fe549f76f87f40aadd3. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QM6P41515566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c78e34a4ac2c7da7a1faf53ac2c6588533ede1f4d798624a2b47074d288fdd3. 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/QM6P41515569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d2be9c5f901eda90202c73a1ebcb98525860869842e2f4298d786f622aa7a9. 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/TR0531706019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0a5f5239172c38781d185bfec41e1be749fd270cfe21b83f5f7544d84d2bc1. 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/TR0531706021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc0f51d758921de6dde6c4edafe7a8d4745b3a4f83a3e7c8b723c19ba8ba910. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:02:32Z), 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/TR0531706022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b115adb7f118316c4688b3aa394d10888c421affad2a360cc2df0583210a15a. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TR0531706024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb744d84d22a5aa49ef1f48ac4adf8f9228142fd5b8c9eb0a9d232bd68d3dcdf8. 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/TR0392000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaf1d0fbac0e77d3d7d883c8e2b75d534b69ca3a4c639601ae6f03e9da87631. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/TR0392000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6c161914341ec3e852495fe320badedc90d0a6c1f361900259620f9154e1bd. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TR0392000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb744d84d22a5aa49ef1f48ac4adf8f9228142fd5b8c9eb0a9d232bd68d3dcdf8. 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/TR0392000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaf1d0fbac0e77d3d7d883c8e2b75d534b69ca3a4c639601ae6f03e9da87631. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:58Z), 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/TR0392000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dad212458fc882572a7927e02d503a4cbf85a6f0be1de42d86cae9f67ae4854. 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/TR0392000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd483d6eefc489136cafe261303f9556ccd09aefe643de138e3a098c572802f43. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TR0392000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6c161914341ec3e852495fe320badedc90d0a6c1f361900259620f9154e1bd. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/TR0392000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8243ffc4cec7a1685650100f0f3e0ace98a66d5fe4b25d57f07b4c15fc19dfc9. 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/TR0392400914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501c3824957cc7b0ce078719f707c8eb3c95414951b282e429aeaf3ba5d8fe48. 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/TR0392400915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b86ebe7c31238c013dc995db6de48da57663662cae928cd747529850b0b25a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TR0392400894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9737cb63b5047498382048c26d8bb914353742704a3878aedb4d4c483c532d0a. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TR0392400918.