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 0x2417d638d2891c5c8d95d67cf3b0f8433872a209e4708a5f1d6082693b8355c5. 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/08d7e4b0-03c0-4011-9e63-3594bf24e0d2.json and https://artists.proofprofile.net/proofs/artist/08d7e4b0-03c0-4011-9e63-3594bf24e0d2.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 0x968f01a15ae5b61df7566a6d0c3f7d5b5a413d5ff859e52779f13cd10716d193. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM81710621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ddb8bada3ccf1f4c532d161d83e6aeb3d40589713183754af8583e30eb38712. 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/USHM81710625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7723d08ec158cf57772ef40cae631621576257b0fb5998ffa2a7c87abaa6b4d3. 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/UK6KW2000304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e48d945d01a12ee2b52cb4c8571246403ed66e5f9224f4e18d7d0a53eed2a9. 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/QZK6Q1976770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb92f1e60d83be8bfa9ee807532ab236a148dc077acf168b532c1b12d8adaca46. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZVEM2312455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f530197859193b1da91f38ecff921d93b976d8376f443a49e205a67d7eb1993. 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/QZVEM2312456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994691f7ce5c21de5b5e1fdfaf43a463a60f5af6542398a4e5cca45df131ad2a. 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/QZVEM2312457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6800bec38a1d71fd83bcabf132f18319910469b733a53262484049933f9afd49. 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/QZVEM2312458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67add9169abb371239ca4f6b57ed9c2687574b483ee11e70b894419733147069. 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/QZES92055485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5308fdb1e604ef4a81623837fe5c552b87cb11c323eb1db364593a5fc4dfcf84. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZES92023171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fa5f87a0b89485f2b83fe1447ce7a7ef411a91ac686cbc19719b45ba3f36b2. 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/QZVEM2312828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624c3aedd577a1b5deeea7706e4d4cbef63f7493ef5c4f2073f4c3b0975e6cb5. 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/QZVEM2312468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c9b2312d6000d581da9e7474b56b0aa7862c317b3c336423ddd97513e813db. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZVEM2312469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b60484fe878d5e35c96619180827fac7780b319e95edc5047117cc0a04e235a. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:33:49Z), 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/QZVEM2312472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca4082bed6540294ed3eb0d4ce252366333846b68a6606c9a54622f6ee37722. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZVEM2312473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62eaf492ce446764d93919c5f33e4824ef963933681b7d3803821b6a7298d720. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZFZ52100968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96b3426d52df5a2494251c72274e690073de90c69b3fd71747b98e93d1c9231. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZVEM2333093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b226143e076af1c2c92bd0eb51bdaa68ccb9e20fe23d02359ed39054f57f81. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:58:18Z), 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/QZVEM2312471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce3b68b4c01a2f54e99949c3c38bd6f24000b4fe8ebc5fdf9850d6d2feb7cdb. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZPEW2400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b00d64d462a018a60d150a943b8683ddccb0602ead70c3a9a2cce149d5e2cae. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:57:46Z), 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/QZPEW2584977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e404eb30ed592becc2a8da7a935353244cdfa7dd7e7979a7c966800e3fcec2c. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZPEW2584978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0457408bf5d496d298b72902967ec175f2b45b13fcc366cd2e3211a10ba5c03c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZPEW2510707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c96852a4dbcaa3893fdd2862e753f6218d3e91e7b959efd40800706745ee31. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT4K32587733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca3c3a95d5c85f569b352e851cca565681e8ecc7ce80900c40d39100044ecc0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:36:30Z), 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/QT4K32587735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8468c157ff0001663682d3e7d607d4fb1b88337bbaf768f01a7e00fae4c1c0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT4K32587736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d3770ef8bbad20eb4be941154d39c8351d1623eb4eada192278b2d9393c462. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT4K42564120.