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 0x537d6c750dc752559ef693dbf809d573ebeb791aa6023ace527449222cf63ea3. 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/2b07ea10-2ff5-4d35-8d24-5b8f12b4df73.json and https://artists.proofprofile.net/proofs/artist/2b07ea10-2ff5-4d35-8d24-5b8f12b4df73.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 0xa51a952fe8136e867158aaaa7264ba285e402deda9a01d9306349578e45264cb. 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/NLSB72400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbea7f126f0bac6bff487e667b700cb9da2dcf874214b22580ce033afa4b1272. 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/NLSB72300570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb9648e71bb51262cb0afd26f5fdb4466af37275d12c281a4a937c36467eed6. 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/NLSB72400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246fee5728ab993734fa3241dcee66e3dc76a8dd1b11bfa2b32aeff2b3de9c56. 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/NL7DA2300922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b56d0131b2ad6e73d89149a94fef1caef16eafec01bb307c6ea2841f5a54a5. 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/NLSB72300467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb226a7774b93cb8d4158a803e67d7509b3d0a86c2e05fbc8b4cf1d9470af8cb1. 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/NL8QC2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925eb4ebb3f4e9ee49f35d4f342b3e5407669cf08f21751c1397ea60aac82d17. 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/NL8QC2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef5968e974a933bac966ebfbb5d40855f80aaebbaf1516ef1fa4fa96a84b258. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NL8QC2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5556414e3d00d9886ca9cf8c2d765996aada18768c0f7eb9add0a8096454a696. 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/NL8QC2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950e5f8a238d5a095f5bb2920bff5dfdb0fd9ddf5f9852fe6da331878a311e66. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZHN92366397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571220da887eebca7834fa61ba215ee31230e629bb9f8dc3c2276db3a9d31ff2. 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/QZES82377858.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa205d98b81c365d5e9dfbce05678e80cb7fbcf800ed237caa1a572bd244d09a1. 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/NL5CY2300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcee22d3caf7b1ebe9febaa7d5d1be74de2895295b24064c522d2dcc79280f15. 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/NL5CY2300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c8041f675aa9a4bca501d98e5a6b0882b92f3f47d4d3a620d8d2d11e8acc8a. 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/NL5CY2300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e3ed54572d97c3afb7459b6917ad5ae16e84ebb871b143dd3dd8e6425ccc2f. 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/NL5CY2300313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86de37f344984aa8daa991fd7eb35cc5c697059dbe51be5cb6bf3abfe4334f9. 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/NL5CY2300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565231b1cf111ae29ea863c698a4c13d251ba32ec7331188a5722adcf7524c60. 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/NL5CY2300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c5344f56297579bb006e24c52dbc80c1a6acb582e8aa1deea9ccf61379a26d. 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/NL5CY2300314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2dd179d4026d0b8051d82de5dbe88246ae680a4cd845af7524ee4e944cfc33. 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/NL5CY2300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77939fad6daad6c12231b123ef4ac4c5fdedec9ef4924de04a0e611ef6095188. 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/NL5CY2300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bce7b4b7a9a2cc722f50680476b06a253b44f8621f72ea6048d8d4e4bde6e66. 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/NL5CY2300317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6df8f2e86c961de50555696c9923f5b03d8243a205612f957d846feabe75e8c. 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/NL5CY2300318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b4bc0ae3308da54adb4a36d57574e6a81e2f178a9ba974d83d9e523393681e. 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/NL5CY2300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319b5b9d143601b0deb8f9bcfac68286e1a2e9b56c02c7e4c12fdd7d4d245e11. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL5CY2300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565231b1cf111ae29ea863c698a4c13d251ba32ec7331188a5722adcf7524c60. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL5CY2300297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86de37f344984aa8daa991fd7eb35cc5c697059dbe51be5cb6bf3abfe4334f9. 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/NL5CY2300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c8041f675aa9a4bca501d98e5a6b0882b92f3f47d4d3a620d8d2d11e8acc8a. 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/NL5CY2300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86de37f344984aa8daa991fd7eb35cc5c697059dbe51be5cb6bf3abfe4334f9. 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/NL5CY2300275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c8041f675aa9a4bca501d98e5a6b0882b92f3f47d4d3a620d8d2d11e8acc8a. 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/NL5CY2300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c8041f675aa9a4bca501d98e5a6b0882b92f3f47d4d3a620d8d2d11e8acc8a. 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/NL5CY2300265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19295b298db4c684e47a81535d2fd8b1ae93a5c5d35826662a3bf7179f411391. 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/NLSB72400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2601fb6250b859f949f34a36465cae23dd29127dd41a37b9d9338cc1e54a2f. 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/NLSB72400257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51a952fe8136e867158aaaa7264ba285e402deda9a01d9306349578e45264cb. 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/NLSB72400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbea7f126f0bac6bff487e667b700cb9da2dcf874214b22580ce033afa4b1272. 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/NLSB72300570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb9648e71bb51262cb0afd26f5fdb4466af37275d12c281a4a937c36467eed6. 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/NLSB72400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbea7f126f0bac6bff487e667b700cb9da2dcf874214b22580ce033afa4b1272. 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/NLSB72300570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b56d0131b2ad6e73d89149a94fef1caef16eafec01bb307c6ea2841f5a54a5. 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/NLSB72300467.