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 0x9e4c5c75ff0d611ea449ed5670bddbe9406ef0451d5df94eec873122227b1504. 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/7610166d-1c31-4590-b7ae-d261146532f0.json and https://artists.proofprofile.net/proofs/artist/7610166d-1c31-4590-b7ae-d261146532f0.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 0xe926503bb5b8154e29314226fa90900b7ba5d55f9d302d52ee9377bcee0dff64. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARG991028551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a977265b01294c0e720ac54029ccfe2a69858395939ab6623f7f2e49c7d52f. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:04Z), 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/ARG991028552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7cf4a82d4efc5309d6474b880de08aab8b9dc342c3f2d5a2e40dd0cd09d273f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QM4TW1934915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81884c7d38ef27fb20ee6dd489e428a6d8d4202d4c0d4e55ad04e8e5b8a93e1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TW1934918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bdfed7269bec1409f7b04db2023f0dc57ca502aa9b7f660696fff1063c6fda. 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/QM4TW1934920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506a8a35eccaba12ee5cf40d836db0ae53cff5e34b6d8458ef78aa2a49046a24. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM4TW1934921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a659f9d9d891066c41734027aca8d973eacd8d4dad5ab1e542dbfe952045af6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM4TW1934922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19ab29adb1760890eacc2507e9dbdc44eb055b550f99733ce5e67c81e1cfb81. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:51:21Z), 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/QM4TW1934923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfde561d74857464865d5a13aecfe63faa8c4550a683422d239f7dfaf1261eb. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:18:43Z), 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/ARG991028399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c90461cb2bcaa5954ad3d8bb9618dc01226dfc645f641cde10bf1fbcf0253f8. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ARG991028401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0c2015498c4b1321552d54a51ea8b258b9c502b159ecc4222014da3ea9b4a0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:47Z), 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/ARG991028403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45178c48934703bdf8926fbbb27d9e6fcb5f04891722739dc81417ab88413b98. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/ARG991028404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0972f528cb6a8907c5c72b109365a7c8335696f11b9e31a399fdff20d4487385. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/ARG991028405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855159bfeed9c889c3b3a07f100a60cf5e97f17982d8b50ecdfe51cbec40835d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/ARG991028406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5373553f8792903831913b2a8a3b936f3e1c6a03bbbdba5dffca95bedc4767c4. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ARF062300698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8e39a2b0cd0c9ba13f64f5481f1a074fe1238e1b6e3dfe0ebe0d3b6184f2d6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARF062300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a8f37b57c00f3f032de1efb60f528c6001671c59a4fe0ccf755f2affbc423f. 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/QM4TW1935431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db589192ea8c5d47a9319b4e4b275abbfac92ebbf9e0a667f2704effa5d196d. 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/QM4TW1935433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a145a7a3e71fcca4d47ef7358b82cc0be5df93c88f436dc2ac50e96d1fd015e. 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/QM4TW1935435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c0d24cb2dde7cb05bf8b441ef58340bacbd10ac467c2a8164f26b4a70f3a7a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM4TW1935438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7820fd0c00f59dd3ceec9c46dce944cf6b31793905c904202bf53b60af6790d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ARF842000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafba3f5062e6f0ac749225a24ea23d83b2ec3452daeb6017b003c7dca85f923f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/ARF062200407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea6003f28cfe37fdd2422937106d88fe5c9105f573a8f0ddbaa3e4275e30132. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARF062200430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d3f4b9f1a80ad3c13de545f965e00875f535005d8e554f6d67e4cc4c43f362. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARF062300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cabb0784065351aebb2fb14f6efd560d2859d925eb7b8f7e5b8fff8d1cc0c7. 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/ARG991023766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b48b73208001d3db8a9076c101bd9351753b4cc42eaa368021c0a33315f9bb2. 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/QZTPX2486305.