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 0x79d7f4d1f2c5e0169bfd200f01fc8f1c8efa2f92f527191a7bdf10a026844e0c. 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/fb4f83b3-ee17-412c-b9b4-75045350d6f2.json and https://artists.proofprofile.net/proofs/artist/fb4f83b3-ee17-412c-b9b4-75045350d6f2.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 0x6c72a97403e7236bfb09b3b39acc9ddeef675e87e685e5506d82d0fc2003ca31. 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/GX4R52133560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3536576ecf787b4cb8caf29e2f0deca4f885d06f511b9cdb0f493de185b85703. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GX5MX2108391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84bd5c5cbe25c6482dd778c9fc14ed854bd83659ea01a53f7e0f24c88b15c7f. 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/GX5MY2283240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5125dea848d57ad5fa4e826010ff123ff1121f9b225263bf938e329db20472. 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/GX5MY2283347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc162e30a1dde3785e159760464b9085123068497e624319f6eb4357a3ea9ef2f. 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/GX5MY2283407.
Once More (LostVolts, H Lazer & Arvenius Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdd3b9a44d72cef10008dbd598d8a71002d588efb7e02ebb191278bd86f80a7. 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/GX5MY2282851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00802e9bba5a43493b089693bd3fe93be8bf51d3b0542e06378f25fefed8bae4. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GX4R52332612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68920bb46a9f7d8351a8fbcb3071ebf8277ffd64da48269fae9aa14ba27560ed. 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/GX8LE2440477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e1a86ad93dbf90541569bec9a6bcef542ee98233ecfb4daf2dc948e63f3f68c. 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/GX8LE2420057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90516dc2bdbd9d19ee2d4dd459132956ad0272a85a116bfa4fe1c56656314762. 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/GX8LE2418797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d552887280e6652871f7e124e1928eb3144f3b015d8f36786107acfe7d9ec1. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/GX8LE2471536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60563eee5d3da6d58715e658eef52997f2bf25953684a879aa390d13cb42349. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/GX8LE2482499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79de8112f57c6dd5a24e8d1e5964c37b0306e9e6b92ead27a8658618681e1c9f. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/USA2P2230719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63719008ead9386dda7ef162c13d5f70b636ff62aae56d50748874545ac5dbe4. 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/QZS632205624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fff407fdc3d3679133cb96ba98adbf03e6c2cb5b9f50d508264b499889cafe5. 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/GX4R52292274.