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 0x1981d896e2c28641f106d2750e0e9614438a24332848675b25f21aad78553105. 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/af039c64-6429-4642-907c-81d9c2433be7.json and https://artists.proofprofile.net/proofs/artist/af039c64-6429-4642-907c-81d9c2433be7.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 0x5ec29fdb607e33098ae8e34b81491aa27e09f204e3e98c6b1b8e8f0e8f302a8f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEHC20943905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e99c24ef794edceb6c67f07ddd0e522ef6fa33d61f41b888343786486e11ce6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEHC20943911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14848864c4d68d0c2dccc267bb0101b919b441e11d4296350daeff0acd12b16e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEHC20943914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5e46c4d8e52d7dccc87b59b3cd96f4f4ec42d462ebdd861a1f3663f174fd46. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEHC20943916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb106ce39736342eaaad5791ac7d0ff42cb46ef7c63e5bb4ed66167720c6b3d3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEHC20943919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8176e63f86311d838fdbf16bdab835ff2b8cfc65146e3a96667859f8e541c0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEHC20943904.
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 0xec61c6f2ed9e46d7f09511f5a0fcbc7007d7da941c7c84b6032a67dcebd84c93. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEHC20943906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdf437aac6296fd4b77be62ef79e0d611ab3fe1cd7a7428b7cc61b90868e96e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEHC20943907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb4c20fe12c8980566590cf5b185df4c9ea40b02940494217c364cf7ee09ff1. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEHC20943908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9244c7aa2c4c4151b47d12b686f24c2ffb9bc2bc1875af8ad650432bc8c2e0a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEHC20943909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce8f80d62e6a6ffd1f1696f274603d2f9dd8bc84139a2eb094b227a6681c97d. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEHC20943910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476206376fdece9b78e06b4fac72f5d55451d9ae71b6f348fce1b979654da83c. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEHC20943912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a511a2ca17b2757ea8bffc766ff7e8b28ebe151a8680fce9af1faadc3ab96f. 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/DEHC20943913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7844d499070c5a27d460515a457de95557d63879ab2e29ce8410ccc153f2129b. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/DEHC20943915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda223ba0b5c69b008d78fcb69a81377d7cfaea5c0e115a4ce124af3d48f2ba51. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEHC20943917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9298d443090a3eb12aec738de38ee95ddac48cbfe32c530ebe5ae5c5208af636. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEHC20943918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a914d62305ac1c5f8b85be869348915e342a0b2975e99eca43b19c5a5c424b. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEHC20943920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fbde1ede9b9261a799aa4668e3060d9cf3d6be62ed0e0df6c6f6f1af5e024cb. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEHC20943921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5e8d68311c28516419ae9a53162905bb62dc5a482a338d4ff89edfd2376268. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DEHC20943922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e307b0b0bce06bfe81fdf1f94e5cf2254f64c0e1cc082496682f92fa08eb15. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEHC20943923.