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 0xc339168523557a7718c0f3bc03ed1aca4798a4f88217fd448b6d25aac120f9e8. 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/cf2c834b-b9a6-41bd-82f7-5605a40b025f.json and https://artists.proofprofile.net/proofs/artist/cf2c834b-b9a6-41bd-82f7-5605a40b025f.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 0x733d7948e108f2819bdf21548a14e441fbe62c19a7eb76eca0551f817bce0556. 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/QZDQH2423955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c161b1860763b024b90d28d9a03a12c456c47eddd551365a1c78b4544707068. 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/QZDQH2423958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42c97c4f18f6f59c2482c60309c54190aec5d9ea4a3c2da72ee4ee01243f07c. 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/QZDQH2423959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0ad97bc7460a1a5be65190ea64b8d1a7fcdc3ae72faa7ea36015056fd4f714. 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/QZDQH2423960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc109dc337a19c3fea00a9493ff23a39e720be93d64ef6c0fb7b225a7f8ef2758. 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/QZDQH2423961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396dc1ef5c455504edf0cdeb4e4bc980be587089960090215bebf193d187e8ec. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZDQH2423954.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5603df5f3a29a1a126122f8aff335dfe6dd292787371c1cb0a7a58521688f89. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZDQH2423956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16332d07c5abc00adca0b1ad8853b4543298ca050d7e3989922c650bf8569302. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZDQH2423957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38b89e75644e75a2fd0ce580c51d3c23a719fbf01655a58aa16e44b82a19998. 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/USHM22006867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cfb6940f1a989d180acef08d6edd93335e71dcd8a28bbb5223d3c77ac71c3a. 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/USHM22006869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da3b4592983159a3950d79960ef653bfd3db9f678abafd83811547e65f4ff49. 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/USHM22006870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4369a1c27e1a1e197db14230f787739f114809df4c2a1b6b6859b68a3518a11a. 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/USHM22006872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8336ab41e04e77107a3ad85b0f120681bb3f45ba7443127900b12d786017ae48. 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/USHM22006873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11f316966b33ff5162dbd2cb66f38001f7afc297f887eae03ba3272e7c6d9fe. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM22006868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea5a3ce8b2f720d7fc5f6aee89e98efc0dfafe13c1bfdd6f47447dc38d42a28. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USHM22006871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf9987f49855230d061222e68550377d2b559f4cde951a3358acf8504a4ac23. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USHM22006874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4d5301b31b8f0b241c2a94f1e947fd9491c2da5a253317f7621a2a588626eb. 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/USHM22257121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3d8c9771b25819c32f8bc0fdb04a19db37a17c8862a592b48805f9cb4ab88d. 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/USDY42058318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057a29df441bf106545dfa67f1f626b47d0ab520f4f73e664e708f1fe8758c27. 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/USHM21951490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f67e32fbc2cda7e4f6d7f8cd25c5271ef13081f66b943b4f12ba04c7fb8b29. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USHM21951491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f8b1a83aac79e6b9ba8489296814b5b951f5a534366e833b3b49e1d47eba9b. 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/USHM21951493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e7631af106399ee4ee2c878b42e119050409ab669bc9965967df025026b647. 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/USHM21951494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b54c289041f1923f8ca37191f8d96af27d1dcc55767951ad75293326c8d0541. 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/USHM21951496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c537a6e9f2849733f447703ab97b61654bfd85f3eae8894eea32f938d1067f. 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/USHM21951498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb799520edb4f15ff685a0381d736c24a2955aa0d8c22eb5ceee0ad723b7cf498. 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/USHM21951499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756edde4dd2717dd88881b7d6b1c8c6eac3ac395903ccc2ae40ac77726f03965. 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/USHM21951501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cc14f7cf9ce0863d7b41d978500a9b6dc5823e199a8d7b9177fa6e1d41668d. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:37Z), 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/USHM21951495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd9859fe2c1073d0bbda25a58b9c7629bfb86b1b8669e05205bb163d26e5cd2. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USHM21951492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020748a61914cf697c5ad32810575c95ac5393188bdd1fd4621c28e34f5460a5. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USHM21951497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4f11cae53f0a5032cef4bcc33e1ccc44dca31c039af92e4a0743b70200811d. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USHM21951500.