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 0x3c365a52070bb5e8a192aa4ee082e2063b97a945b1261e416ebcf4f3eb9bc583. 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/7dffa485-c473-4e51-9df4-00274defbb18.json and https://artists.proofprofile.net/proofs/artist/7dffa485-c473-4e51-9df4-00274defbb18.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 0x4dba87d8453180e36cd4a21436766e0d3e2d73b527c6e7657d8323d1e3384ae6. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/ZAA020400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e6047fd93caf42c140dab7ceaca3d2ff3d22d9fc2ef3aa1224683ef3d97b50. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/ZAA020400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070835921b3368a21a2fce4b4e93f99229de57b2f6aafd6e0edf92108160e453. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:26:22Z), 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/ZAA020600579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7870c0e595dbb801e86861a7287ac4460a5b2f591ed76702e1a5926be34ad9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZAA020600580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd9e472fb5b86468676fa85801df73a72ed4caffb4b67bbfd0ba8ab7dd010a2. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:51:59Z), 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/ZAA020600581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebdb1f9dfb013bf6c24efcc1d80c486c2a99ce30a1f2353dc013c45f3aa8429. 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/ZAA020600585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d61392d4c4e1a0ebb3c6d567f7801efb0eeb31b41d8ce9057459406a4699e0. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/ZAA020600587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b39b6fde3dc703beea89f45cf8d225b62b73314444ed9a53a7ad0cd3d8e10d. 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/ZAA020600588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56679d8a3765ff40829ef259b5887d3843621b42d7b1cab0140d2af839efda31. 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/ZAA020700537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf800fb3cbdb62ffd2d7604d7d4b5d20423eea0941c03c5f542e5387509d24f5. 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/ZAA020700538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8f241d452809bbbcc3e5df5f8cf6c4b0c4d5395aa979f0a8f4fa741c1fc82e. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/ZAA020500426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975677ff1305ec9f2c40e8da54a419696e0207a1bf2b92952511e3819ad44102. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ZAA020500427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1deaa67c3441f63f97c2fb24a3124564912f067a1c32c7a15b50baca1778ca. 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/ZAA020500429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb11458d9c20c034c554a8d7894b1c989b1cc5696c3c98d5aa1e2806f37b65e1. 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/ZAA020500430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc115bebe0419fe6b6d1bf48a55dedeb1b0d6102727daf25eba51f8636da15810. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/ZAA020500432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf249a2f4906b5c30a3e5815613448c229d08f6db67fe6943383c5189ae9d6031. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ZAA020500434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077fe6bb3fd7784255617186230a590cf9d2e33aad7b5c054a267008271bd759. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:41:25Z), 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/ZAA020500436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa4feb569e77d9ed789e28085920bd8c54a2a09f29eccac6e9556bbb02ba71a. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/ZA56E1516226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3689df9b32b2bb4ca7d755085a27807335aedeff969805cbc893e8369115a8d5. 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/GXFHP2403678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cd12f17cc05dbce9f66d9b2b9c993cea6bd76c334d9185f250d1a415c6c47c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:09:05Z), 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/GXFHP2480983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ad8c03851956dc0e872a7de0858ec1de14bce4e6e73603b9a2aa7ddce3f391. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:37Z), 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/GXFHP2444636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04088afba973ffbee8c835128ab8334be18340f848479ac8fa354e5ecd7499d1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:59:22Z), 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/GXFHP2497099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c3a0a27739525b16cc2750c27556d86eac034733c316a4584cca2cc3e44441. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GXFHP2459868.