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 0x0df2f42a1e0cfbf13d2c7d3337697ce7db861498dc694b692acbd5f5a6ee97c1. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4763902-7af1-4a13-bcc4-7bd1b9f82028.json and https://artists.proofprofile.net/proofs/artist/d4763902-7af1-4a13-bcc4-7bd1b9f82028.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 0x6135083c7460ca32ecdf8c5e8696479dc36ea66f63d98105c70839a392792aab. 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/DGA082436633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c250e1d63fbdffdd983c09be52f09ee959c9ca623bdb68eae9e45f1d88a3ab. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/DGA082436634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc68cceb8ac2a9182ffe348ef085b7da657aa45bdf22d392b4f78c1563c9ed1b. 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/DGA082436635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaca922066f4e696878f1141aa9e57ea72bcf8f8ad3ee817d066f4d2c1414df0. 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/DGA082436636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532a2d7e5be26d9db6b830ac655b78bc0f5317b9112438d6c10ec161fa409f69. 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/DGA082436637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c30e0d53f8cb51a743196748c7e3d411e70341fe018646a7726e33ee6980d37. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DGA082436638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4b82fc061071750f4b32e3aa7cf87e6657940c456b46a3da649475e7dc8aa3. 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/DGA082436639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5554bb222c365a1c259954cbb4f980fa7d713648e6ce3c16770c1bd99e4498. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DGA082436640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe264f34a28d2f7a146fc00dc1d02c35c851bd6ec5663118791c634e94978df6f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DGA082436641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc602a96980e8defc6abbfb381c9dad93c51b1db869a0012f2dfff3d67b45cc84. 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/DGA082436642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6dd0d5cdbaef95bf9954aa7866c20759438225407ce129853a9c70c824c1327. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DGA082436643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7db5cccd162260dc50e97e99c60b8c9e445989e0ab67818459f7467f16b2eef. 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/DGA082436644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d24aa5054d08c630cec1885285658b967c9b6967854fc5dca82b50e5679b54d. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DGA082422866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2053aa36d28787030489f7b598d2f0858900514f2cef2728820876f0fe2a1a62. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DGA082422723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce628eade117ad9e003b2c2cfc87cd7505aa084122e7dacef5937563105f464. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRX282476982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0643859b29f38e08368b000ed7c6170be892748b37e0382f9518d1feec16792b. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FRX282476983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5615ad90b015fb1bc0e1e3d41885b235cea2987eea3de79ac38b4c437d031b. 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/FRX282476984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236f0574fbea0ae60228c7259fd77e64a489b181854ce0067d57ac4e447e1ae3. 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/FRX282476985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1ddc929fa27421662826f21b47820a72a9fe21e70123046820d1e3269f1e3f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRX282476986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a66b3990b8c92cce19cb3b0b8f637c6e2a20e9ea7384624081835f25e4f26a8. 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/FRX282476988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefd5c37bff6d89e92782fd9031a7c5b900771409632bdd565a2112558525988. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FRX282476989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0311553e1128cb6afc61efb9f23a805194345b5dceab498bd1df449a6b67c9. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRX282476990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00e71e60901be1656373383dce63e532e2dcb4e79f21db59e22bda3292a3978. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FRX282476991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4daf8f55a815aea349b8f52e835e9fb581170ebb643ee7803b401cc74bbc72. 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/DGA062353415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02843c7c544e0c07576ccf8711bf218bff6b39b04d10600f23876f647c590e0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DGA062353416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05df181a24951376afe35fdb0178fde69d788eb31c3804df3a38e2b68c608180. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/DGA062353419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96296d2d35af448ec14516fe92e5c0cf60e774ac2164fbd72fe44515692c8f20. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FRX282392945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449b7fcb5634887b215c1a39fdc6abde0095baa7dbb6a4c5ee9f8b80bba3d487. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FRX282392954.