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 0x95bceb262f31a2f172a152ee626e6ddfa11db1a935127a42da5063c270babf55. 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/4a476deb-c1cc-4231-b44e-d89690dd2858.json and https://artists.proofprofile.net/proofs/artist/4a476deb-c1cc-4231-b44e-d89690dd2858.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 0x0747cf479a1a78eea95d067ba509b5c07436baf301a4b16c7dcb8b7045d69713. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:39:16Z), 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/QZTBA2294061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611276fbe685c64c56cf1f97c3a23e6f6e5cf3e1f1aafe0187a946121797f4b8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZHN82399075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83a7f405e52bb48d4847d38041f4a42dd0c9331d0fe81f15e9c67a03e82f401. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:06:15Z), 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/QZMEN2344120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91bea6d6534ffa110e721355066c0afc353f450724bd740a3bf67066fd557fc. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:44Z), 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/QZHNC2362592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c13ffca86a43226d9705acd9de10eee2ecdef2402be10bb5d7a3b7c1a09436. 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/QZPLS2317359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d5266e50d79faaf6a2f97c0b86998003d9180eeaf5b4ad69c7a597a21a5f31. 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/QZTB32383340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe59de35257ea08aabb6c210795fdd9f02fc8659b61cecfe7527af50d01829f. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:58:42Z), 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/QZFZ32473075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3241c6452ae1341f5c5e88c0d9294b645ce2b25624b616e159fa5863fea857. 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/QZK6F2431076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb079ff1286100d830ba890f5254a10e8cf0ed733ff68a547ea3d56f9a6214b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEM2421555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3241c6452ae1341f5c5e88c0d9294b645ce2b25624b616e159fa5863fea857. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6F2431076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ab0068521b2c81d5073588d8fae74c8fbc5ee72c413daec302eea8a2a72b24. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZWFJ2371539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ded8765d07602b992a1bf7620f976035b04f162b203b5e7f4ddf78c12d72d8. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZHN72466764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f92e2fbdd6c645a55786e59fc4dee679a6bbe364740ad3f48c04a75278fe9e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN42525300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5852d0bc2fd9b17dd224be7e664262ccd4b4337fbd3c8f5835a2baf050088a32. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHN42525301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8878faf2cc54dfcfb80e2e4a83088d52a9e2d3c13ea349f78c0504a724d031ff. 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/QZNWQ2501111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64426e5d3f69ba3018bf0d0bd2df3f975cef13e69254fe94f88c05ffe0d1be9d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZZ782556291.