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 0x964c4ced0de9ae230bb32b5b1553fe80ed13a305691854f593052d5ff937998d. 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/feea7536-0b09-44a3-8291-dc5312d626f9.json and https://artists.proofprofile.net/proofs/artist/feea7536-0b09-44a3-8291-dc5312d626f9.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 0x762659dcde4a736681eed44d6fef8f795f6ce9981c6c31dd24745c5a2260ec51. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QZNMV2067912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498db031220fa4468e8e5280277246e742203e850ff1597b66082ad9584f831a. 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/QZNMV2067920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6293c58f922cf78e23960245b4e312683441f31d18f7477d119eecd50dd9e7f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNMU2081507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244de4dd09a65f27504651bc59d327e457c2c1083288b6f4584eb411d1cb13de. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZNMT2075005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4757ff0eab780112d7f2a54cb173b6d6a6e2a5299f48c7f967a582248bf4abc7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZNMT2019269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1702ac5c84e105888d31d13c73dda1395df650758e4326d34e4fbe4893bef742. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZNMT2019270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46232f0ae8f8230f550499aae0cd96dd20b904c018b2ed197ade4a9bb8f88781. 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/QZNMT2019274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb7fbf0306a684918ceff1861765462ea4156021427826c21c4a7ab3cea22fc. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZNMV2123280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe097864e0e59e946262fb36c16320d92d26b3cc9b0c779baa49021c602f09ff. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZNMU2025252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97857e6ccfd19137defc1d72a375345041b3e3a5917739194735b4ac6ffe81c1. 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/QZF8N2100788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805094addf42ad6ea33496c7ef5f7c497b6d9940dbed39dce9b26946a5b8d66a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZF8N2100789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fb9940c5fdd90cd2d78cac4906ed8ed2a528d6de3bab077908e6ea7c384840. 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/QZF8N2100792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57bf6252a0cd30b40a4ced3c501b354b496d1b95fdb734103cc9a8feaabcc8e. 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/QZF8N2100794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd55d775cbb5233e43ddfe9c4352bebcfcae29aea54b04cf05cd0356049d6c42. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZNMW2118442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7ae37d4f32b9db02cbb75365ba9dcab17dc4929c2448d494911fcfcc11de24. 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/QZNMU2058888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8163eeac145e3e124b7b1448522262b4fb581fdd6a06422618108cf92861df1c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZNMT2053394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1235edc42a6ca0872acdbb7c5dd549c5feffe79e3e52704e792b3c13132e6e11. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZNMT2053400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24125bd7e354ef6f5f850e5d6b3fda21beeb1ee4e1aeeb2cbd125cf0700575bf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USCGJ1528647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf410c51b106994712ad7c53c00a48d45a1431d4e9616fc17443274ebe6d505df. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/USCGJ1528652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16882d7396bc0db5911db07a718103c779ab05563edf0ad0123e5ae8c943e4d8. 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/USCGJ1528661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b74026644de7a647cd0ba9a728eae3652c444d7bd59ae77e5db204c12261bad. 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/QZNMV2188315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53906b339526d9365abd9a851c8ebf71ef6bd9d3f20f2ed7407ccd487b22e41. 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/QZNMU2036201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73321b1814e4c4564606eca3381475ca36ff077d06e9abfc73e50ba6aa5484fc. 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/USL4Q1812021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d384e69a01f0810afe27ceaa07686b50a0d49cde66a6828d4f2c6a5838677f. 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/USL4Q1812022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65b76c58e53c318fc572832d64c89dc35e6e50f0e7266b283c0ba1176101b4c. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USL4Q1812024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf7b82ee15003248148695e8fa1a66251f267b099b29895776e4f7e3ddc6666. 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/USL4Q1812025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c4d02004ba91f409e9ceb723c1fc3e8df395b51f09d01d8c8591799dfa6eb3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USL4Q1812031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4a7d9711f3e17e596b64e42e01d1e713a8b7bef701e44b49e13ca64d57e907. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USBAE3367882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b63b8a1e771fa16c0b03d4f5781d292f1f3325845dcb7c44a8ae9c41e67461. 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/USBAE3367883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6da6d5c5e52d1c1667a54e9c85fce93f5923aa5d1cc4b15b971f0d26060734. 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/USBAE3367884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb285b230360f1d162cb7ac9488efd93aeeafd9d4e1d6cef92a1e0b2397fca8a4. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USBAE3367885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8774d6cf51a9901df4e81c91679647d54313d4ae94da637dc10671458aac33. 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/USBAE3367886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2efb1e03cbef54f000d4328815e8bb2a576baf3824ad0524462de96eb213701. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USBAE3367887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc60d3e85f6a4d8d427d52ab3cb902428a8e945b411be937a5f10edc7be4bb8d. 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/USBAE3367888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8424bbb91c57f567de6bef3b1ecf42ad477c1cb0afb7100af504602db032f2. 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/QZHN52266398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7f2429570a197e42cd86943fb12c297d2ba179871f411b5cf5df39eead3683. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZHN62271529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0656bcf383c2aa0dedc5d134621e1cdd6aa9fff7955e93130805004556a00762. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/QZHN72251077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9d0b7e247883dfa046f5cc05124ff3077bb2f3e2fdb4b3c7849ed5ba37448b. 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/QZMWW2244146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0f2596ee51fed840bded7f0ebc806c6647b3662759c937e6ad322698f38fed. 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/QZNMY2199208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65d28d1c8aab84077e82bbbca37b1c7d0f33970cdd16cb7a911b6a12cdd2805. 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/QZJG51708094.