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 0x87210587bf152bdd7523efcbee401ca37b8cc8933ec1dceb862e466b01e5f88a. 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/e90fba8e-91a5-4cb6-ae07-81c80ea320c9.json and https://artists.proofprofile.net/proofs/artist/e90fba8e-91a5-4cb6-ae07-81c80ea320c9.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 0x9c9760dc6f92650215fd38c5914197b8308f1d8275600c199ce25146f325c94c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMANG2311934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f2e8a0ff4e77c7283e91620c22134e7842022cda1c406227cc09a1251b4b92. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/ESA012380894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39288152b325512223a134389945d2a3189193e39fd29aed3a616d43f0b2ad3b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/US3DF2426145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf603d354a82cd058ee51f9785e5de8fcf2f98dbb6945e72ada9f237c41338a04. 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/US3DF2405875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370f0b035532f8b7e9f3fdcdcf32e459d68bffb7d7a51e5e75cff2ee4202024f. 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/US3DF2405876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8a928df5f325e3d80d4b50a017608207add34513fcea20ede42b81174c4243. 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/US3DF2447367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3272e265b1887d72769c37b07269a697cddac92abfcc51a1f6f5658906a40df2. 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/US3DF2447369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ea5415fb95e93a66b6ee711f0c9d77143586b7c9968625a44a8ef97bf4b9b9. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:03:55Z), 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/US3DF2447370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5563b14e27655e105a9f330cdb70daae576af89c3d364cb515b46bc5a5be59. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/US3DF2447371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91b7f57a1ac2d8496d473546abd8415a381c0a5ce0e1e71407173d00f70acd9. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USANG2419446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ea494426eab41ca3c6bda5b0870ce51bc8e624268fddbc39475ba38cb46b18. 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/USANG2419458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364c376acc69510f629d1024bdd8b9be83e88617c6350ad1bad82c6443375c33. 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/USANG2419464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bd0e1b882641ddc31ea434f5147d6c4a72f2f7a82f952c82b9d6fcd39d2c5b. 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/USANG2433458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea7d79be8f5ced1d31eb02056089fdddd71e1bf822114280183a43cdedb6cf8. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USANG2433462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7a878d94efb3004717a65874ad9b02e8f96e937154958ed3893c0e525522de. 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/USANG2434281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71504b2b2c722f37e7dbb9dd00ec5b4d9e74cc68052ef749e5d105bbeb4a20b. 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/USANG2439877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c778fefe027b43668eaed19a39d3087c46fb2f96807aaa610288258fb5c8b85. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:35:50Z), 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/USANG2439897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8156a3a726ae7c3eb296d0efa957f5f29d935428c7e0838b3b52a0a4489b652b. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USANG2439903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a2a575ec4c5dc7e19e49ace84865f205d45601f09f172780cc841f8db4595e. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/USANG2461759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f7f0c13eb1f28af387eb697e4a9aa6bc477bd0ab877c7591f9813c3e0bb547. 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/QZDA82562339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5333ad35524a5a4a246623a1bceb16aaf4884e07e29f0e0150aa5ba7c9266dec. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:31:54Z), 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/QZHNC2553713.