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 0x0a83d6da25dcbc4b04c7f72f741bf65f5293edffb93d941ffedabb190afde7c6. 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/303f1802-325d-452c-927a-1a186b26002d.json and https://artists.proofprofile.net/proofs/artist/303f1802-325d-452c-927a-1a186b26002d.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 0x752a55aa56924409188b8be963391974ecf059e59b98f0a4317475d0075b9c2a. 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/BKBSS2400245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b8fbf3755060743f456fb734bfa30fc633812bb85f4fabdb77bf5151587182. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BKBSS2400282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77510ecca0f7f3e863b2ed0300745cf9eac24cf8564df9da63d9ec430606a9ee. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/BKBSS2400292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b1f976984cc45188b832b13ea303654312553f9df0010d5b5651876d95d2cd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BKBSS2400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6c531067d02b5d29b383357e108273c2897225ddc36949a277990bb1a440d4. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/BKBSS2400321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d2950a838268b7de38d363f87b858f3d8a62728c57c1580f142e05d24dbe5c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BKBSS2400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86e4bb00f082731513922ca272a5e42b02002fb87f1f98093d0bdf6a6b29285. 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/BKBSS2400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55561ccf8371c37c79783468d38c5b2c84aa3aabef27b1b0a770e2efff01d231. 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/BKBSS2400568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17940d0cf713cdbc8736f6917064ad81c7db236d03b4e7b695141576c164b2e7. 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/BKBSS2400601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50147bcfc59c5f8366a3da86d43651b242fe9a5d5bc37f505e6bb0a676467383. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:00:25Z), 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/BKBSS2400611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b25a321aebfbb672f921defe26a977af0427b68353698f94050d45d84473e6. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BKBSS2400657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c8b790eb99d3d386d0caf5e22d1e395d86252c879a7ecf9dc5a543116e913b. 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/BKBSS2400702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5955a9a9de94236bc43856078ff3af47cb4ec280e7123a1afbd4e465b22afa04. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BKBSS2400728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf150dba7b6efb307affc63c9028212b4d18e29596bf51b5f6ba862c5235daeb. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BKBSS2400828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1de5e73ab8d17b3cb177830c4496f9f3a2ac6c140a35cb125c6a819c58e5759. 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/BKBSS2401014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0dcb0666f673bbbfdfb55a72740a21190a3dcc1545effb89437af0a3c37614. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T07:54:43Z), 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/BKBSS2401253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d706c1f927c6b35406320fd24e21171b6066bbe3810eef62a3f4bea9f843194. 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/BKBSS2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554afc91e39dbd42cacb9bba52a2931b0f00cb8894bb619c93aed0482e2e4bcb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:19Z), 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/BKBSS2500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254fb39e387bc68e4b83059b9e19849978abdc8e25b1878ce7c3d69d9db9c696. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BKBSS2500236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1a9e62429eaf07f1014e9a26eb9d8db9a5b32f585cf03389ecb112eb80ea2b. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/BKBSS2500243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469047c26ded7a068a750d4503674d131be4a50b9a716d0f8795e4ceeb8fbb51. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BKBSS2500265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7d273e8434e4fed7a80c1729d3f8b5cd0d75bd04d7ebcea912f3555a792ab0. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/BKBSS2500446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3358836895d0451c4fed41ff42cb42c011547e34486fb34c521a13524ff7ae9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BKBSS2500467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde726a29106429785fa5465bc020a300b0871bd911dfd4bcca65baca1fb113f0. 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/BKBSS2500538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bbe834ce9debddd684b3002bcbcc34d159f05932863b85d1bcd9c6fec0bae3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:53:58Z), 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/BKBSS2500812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c138899b6e7d4d435464b8830574822105653fa4f5efd7e37bfe7611009ab05. 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/BKBSS2400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3ed5b00943d03a9463536b09e32519564ae3e91fccd24a33d75b0e8d7d0019. 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/BKBSS2500190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4b62415ced67ee9d0a006b8a9269bc0e153c5554a3c9280248e118199a193f. 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/BKBSS2401288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084d5d5f2d1291116bf23ce207587a1f46639a4480da5f726b014ddf9b7c99f8. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/BKBSS2400804.
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 0x259df6def8710edf482007846117270f689ba750f3a7654da7790b23669220c3. 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/BX7P32300949.