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 0xf87187399fe3099ed1224f1b7a45dd3f73dbf92ff96872c4f6c17fd32a6ef8d6. 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/4812b23c-5bca-47e5-9b42-54e0c47ae784.json and https://artists.proofprofile.net/proofs/artist/4812b23c-5bca-47e5-9b42-54e0c47ae784.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 0x207697f17df9dd33fe3c03adfdd0b71abf8d4f736945cdc64f05dd7f5f72e72a. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZK6H2262027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287c13f1aab8e95e1582b2eaf1f8011cd8d49a17713430de229666353e0d2005. 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/QZK6G2217620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d11aff465b4b0fce7a1e57915e9de2aade90905b13e186898f2ba84c06e18d. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:46Z), 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/QZPXF2100449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408c4c7459dd08eee132e63ab37222954fbab0e50af35ae49a6d2424c59bc335. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPXF2100506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11aa4f968c27d18b086b08199dd28678c005b42b99f5d27d8365eef21d4deb64. 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/QZPXF2100509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ce721dedce31cf4f2449937cdd735e3f727af8ba705278fd91f8100d07b3a0. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZK6G2215613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fceea6bca3ef44ed867bb2b846343355d9abb5cc80756b2ca9c74e3b0479b27. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6G2215614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5137c23d109442d1b6d067069a2b509294349161e885df76331f6c304d0c3f2a. 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/QZK6H2261570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b274de6500e97d9f36f736dbb664797e044fa7464057f08d2d4c002bb727114. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZHN42274870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac7e2d96553e71744565b5283c88094e119282a0dc44506d2d1775d294bd795. 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/QZNWX2239831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd98b727ff2d98afc0ae99a929b4ded8904124d90d61ecf877d7591c0e5b7e88. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZES62344825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76053f5ee53b6dd24c9673ef6770d102a6a210d7289cdd34637a85306efdae9f. 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/QZHN42339906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0280096198adc85320a26209b7d50c2bbea399a3b51a59ee2b5d0ab0e5e2c24. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:28:18Z), 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/QZS642390968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38220139b2538044b564fb95f8ffd43aaa13872c14eb72a7f255b0f1f740e28f. 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/QZHN62359923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bfe05840450d1205f2970bb8560222ab308bdf6f02587a5d8b928f388e32b9. 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/QZS652300972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a8feaf326ee81b74eec3535622a5215ba63b8f64ee5c4cd995948e6e531af5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZK6L2399532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ef4435cde30f45366ee7f791b43b2768d1a4bc1e1f40e5a7f60a49f9612f6a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:49Z), 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/QZK6K2337179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ccd677f79f8f708732954bf86611c292fffc92f3d78410b42ca4c35e8cc46d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMHL2353569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10abe00a4e0cb74090a8753b4be906d90d115d3426302abf3c0603aae81a5793. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/QZMHN2303289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06151ec36fe4bfd6c2ca30991d35ae8787226d546a272c330731309b940cff83. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZZ662443318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd634c07266506b37656f83d4d037f646e08ee9495f4624054a04296b302cd508. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZHN92314202.