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 0xd5a41e6e421db06c1f1de5ef8d236f5e11e22658451db901778aa055973fd5f3. 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/36ceb122-4ac7-4647-ba1c-4309e3144bd4.json and https://artists.proofprofile.net/proofs/artist/36ceb122-4ac7-4647-ba1c-4309e3144bd4.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 0x51567e8872a8a5bd27ea95ec5f6d3c1135cf007fc5ec82192933677555482d57. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/SE6I31954097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf03d6470b971721295793c3ebd4ac89e8480e8223c12169c540451b11187ce2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:57:55Z), 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/SE6I31954103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e193899d4c9719c77479a582e12d34066759e1def5a773e77149aa2368e50c. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SE6I32094121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0fdc9f0c3b01abf4629e8e1c6b2cb0be7566cfbcf3524b532fef2f1740e8d0. 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/SE5752112943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf770fe04d204a61e851fe6fab9e25bd05a3abcfcb3307a0d4566290ed6facb84. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/SE6TI2145948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897c94d0c7154bd98ef356a01409bad99fcd5240f7e3689f6af57b4018f2e8a3. 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/SE6XW2109302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314884f90aee71dfec7d22f8c8bede84d0e9ce77e0d91bf197e50112cd6ba440. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SE6XW2109305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbb010d2ba5a02a5d1689fbbecb2f60a55a8ffe306a283771db76aaa895f8e3. 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/QM4TX2230314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8fd1b83a180a69236f4f6e93601cf3d6e0ee8d7a823ebda9bd44809f798cc2. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM4TX2230315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6613b5de7523cf3af356fb193b7bd7d64151692b0cd9ca4989010696e64754c. 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/QM4TX2230317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf899504e091f00048b1fc96b54ff1edd134b10aa2e5f3c24915ed9e41b3b6f59. 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/QM4TX2230319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3df730ae2594662afa654bdc4e60b4b5752e6e62fd1febe891dc45883bf53f3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/SE6XW2229184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95f341503d2f58ccf801768be0da76cc6ed47f344e46dc8524fd3f54a45b541. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:11:03Z), 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/SE6HN2249821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe680c481508d891d6f77bb696d79fb27799992bbc2279b33bc10ed81fd1e891. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/SE5752330741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288e85661a60ca2c436f87dd0f217f89db4255aaf48d32262ba34f88b326d150. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SE5BU2437638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda41ac9aecd123f0b19b141983db3aa85e1156a71bb7534ccc3a68af4647547d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/SE5BU2437641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4d90172ce7c0722cda57d68382872bd62c1b19ac9987fc2124901daab39615. 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/SE6XW2416469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03485a615c8a0c2b3f860b8625bc22ff5cb1b26a5a653dddab09185fd1e34f48. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/SE6SA2528516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c44fa3fae20f8813c326c9f35260ee2c82e63a1871a005e257c84b31f3aa72. 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/SE6SA2528517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4077b5d483bde58036fae56c7e6f4ed3f2aa827a163f86e2e56761bbbdb82a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/SE6SA2528518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8b7710f027f985b9c63c8286efe50a7496f695afc97ee758ea6fe5778c0e27. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SE6SA2528519.