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 0xf31915760c0ef700b1c899cff1cefb6f3c15293df8cd652db2b4221545db773b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e8b7a57-5c19-437c-8565-8be2982b9538.json and https://artists.proofprofile.net/proofs/artist/5e8b7a57-5c19-437c-8565-8be2982b9538.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 0x1670fb6909fc74ff67da3393c10fa900856524f2ddec6b06317c8a2c0a75dfdc. 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/USLD91742159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf84215d7d29a2dc177f28a1e0d876279caab58635f5048eb0956522fc7e8615. 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/USLD91742161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbc4f2d39a5bf13fc9a94286addcbd36814226900c552a56465b429da096501c. 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/USLD91742162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85832cd3f770a1f4d60b835202b1240fddf6aaf6718e6d6d582a638baed0ad27. 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/USLD91742164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648e9c2b58c1fc7f313415f09e8719314a43b5ea24c65180d09a00b34efc3207. 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/USLD91742167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75cc36e1f164337ebef603783c49df1c25ed31ac275845f9321d46d5d030baf. 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/USLD91742168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af1d39d4179d1b911c53ec6a50fccace9d42f68019a65366f7495adbbccedc5. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USLD91742170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31443bd05ce3e31686f413bf9fd7d7d4dde13a6354d0f6fdc7384850f4b15e0f. 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/QZPLR2214355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4c4e97d5ccb2fe4754b28c861dd032a5bfdeb874e41fa731f1f20eac6c438f. 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/CH7811107311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e4caa8a533e4d5d3c53a25c19ab8a3b62585e9b0f4f7d568733e9e5d50db0a. 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/CH7811107314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67951358546734796afac28511d27d97a14bb9f467de746f2d045b6efbef5e58. 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/QZK6N2141956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7b3696aa486fb80531f0fad4a3f275b56ede6d0923b371b9358d6859009c68. 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/QZK6P2170611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242f1ddc4d06ee9f87b04dc36fb6b0eca0df28dda1240c2d77cc9feee61c3e03. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZK6P2170613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e896da42ee49d92546ccc4538b25684e171d43a786f27adacde83fbf1edf82. 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/USUM71922576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1450c62abb4c2045855ce1d0dd958b0f907ca20ae99127e06c99116f197f5acb. 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/USUM71920726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a3161d7f2b42c25f22ff7d7694faf74257296c5924ea93e31b66fb58130c8a. 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/USUM71922579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e577e460ccba88f17638bfb49edafb1bf0dff6bc11b023fe2ca16d4dc856e7e. 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/USUM71922581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ec49b54b91d18863d58b4a9204ec827979e90834f3111974ad9846dfe390fe. 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/USUM71922585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28941764c250fb6206d46f54aef4a591a97953bc7a5005301ee78fa6377a73d8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUM71922587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0528117d417a01375ca061b6b54b82632cfab3dee158247d9c898bbc57b5c7. 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/USUM71815394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0073dfe62802238f2518645b1462e4c5fd08c372ed80626f8fea0f7a96c0f940. 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/USUM71922593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318b31eb3b1cd017076709c47ebe846f003212bda656f92efd5a92750d410216. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USUM71815387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0528117d417a01375ca061b6b54b82632cfab3dee158247d9c898bbc57b5c7. 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/USUM71815394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78bc853e6caba2e6e28bb0e221c58f9a15b303fd1ab3297763f034cdd1008b5. 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/USUM71815401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a08784b96e69335d9be9b02d3cd1cff276cae8f32d5184976bafe8833974f8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUM71813884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c61e17eb925f9badb3b658bc12ac69b9e4dc1829abd03e0920a6075df386deb. 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/USUM71815398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2591730f1c2be99f949630d045e6248f98a3e62a69847fe0fb26a7491bf85ceb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USYBL1700750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc02d1cca2fe727e90b968e5332416e30477e63a1ff08a0dd05fbb52e8bcc9d. 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/USYBL1701902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923b9bd38ed2d9c81b96495b4156234b9e73ea2f0492c94caa52f7a7119e16d3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USYBL1701670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333ffdb8a8097e41ae14d080d7a71d7f23465725c8e8b0a6bc40bf4e3a8e2997. 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/QZTAU2314235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88a05bfd740e1ffe62f36dfc458f7829746ddb17b211cddaa055e602c44c0e6. 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/QZDA52311106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ec9f1a8fafb17d13c0672526aea91e917608473c4269df3dfbe12dd70cfabb. 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/CA5KR2225481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91f8d3bd53f8890d046daf2c1c0d9945978107b645338d2ca84ddc8d820ba55. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZDA52239769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce3a30de38c53d4f00b00e5510f7efe90c16ddf6dbe8f6da6f03d5c24d87955. 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/QZRP42176205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7f9efa26e86fd12382a1d157fcebc2f7ebd8df87a08d455337e408b294ae34. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES72002135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923b9bd38ed2d9c81b96495b4156234b9e73ea2f0492c94caa52f7a7119e16d3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USYBL1701670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bbf93f881409665a76646ed076d50dcd06fab0bcc2b2e46edd3ff3ac4be655. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USYBL1700749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd96c8baa790029d62452069b8e54962cd4be5e848e6b71f7f9fa302e5eb100. 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/USYBL1700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1450c62abb4c2045855ce1d0dd958b0f907ca20ae99127e06c99116f197f5acb. 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/USUM71920726.