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 0xf7f22bdc4dc180cb59f6e5616fd93f43ccd07272899c90bc0d08073cabc7d975. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0fa9219-9490-4e76-8810-950f228af2cd.json and https://artists.proofprofile.net/proofs/artist/d0fa9219-9490-4e76-8810-950f228af2cd.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 0x5594ef30c8035b98d8f6dd8273701fd29264006f207a83d730e5d8864af53f2d. 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/TCAGD2216267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3591b0ddf16dedec0fe4f3f8cb732521adf69883ab5aa29c66f5459ee04d2d. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:40:10Z), 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/TCAFY2187575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edccd613f2b398109be07a1931bc8b45fcb3eddb5497e4e52d316696141f4cc. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAFQ2191050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694b9e6db021cd4882914790e411d31f2ab1f901652ec59d52a8117ef6f3e755. 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/TCAFS2171992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87e5b2b456c31f5f123e5ab2fd6bf3dafb5d4a3782f59b8578d8e527d93939d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZRUP2200743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429ec142bfb5f0f1dbe1d8144c4c65234d9218c2b1b01510e9b99cefa4ba09fe. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZRUP2200929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87e5b2b456c31f5f123e5ab2fd6bf3dafb5d4a3782f59b8578d8e527d93939d. 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/QZRUP2200743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4a700896db0b9ea84b57b067c07a597dc723531eacbc373b473bfa1367ef25. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZRUP2300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429ec142bfb5f0f1dbe1d8144c4c65234d9218c2b1b01510e9b99cefa4ba09fe. 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/QZRUP2200929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bf6b4b6a0b6ff650722851fef8f9ee29949d82163191c32fe4b86c4e2dc821. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZRUP2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a555f4f7246f81a6bbc0964b07e2a392cd593d35dcc171154be59f171f5b4d6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZRUP2300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd1d6438ea8fefd39be3af4b4f5e32a80b6e83ee033cd048cb9e08880ffae2a. 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/QZRUP2300112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bf6b4b6a0b6ff650722851fef8f9ee29949d82163191c32fe4b86c4e2dc821. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZRUP2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327b17728fdd45c0667b4d1a354d6714bd9ce2576b71e13a1cfa2eb704d7171b. 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/QZRUP2500454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35bb1e8e2e372fb9d6f65a41d2a12c643ed587358debf9696319cd457b4cad1. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZRUP2500456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0d124c77b32ef8891f27bd281dada55ef95cf9963ca90222a313f92df6e654. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZRUP2500457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1b096ece215fe7412cae706b274d0e4506d11ac81926b39cf2d73a9d986b4e. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZRUP2500459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bd6719749eebbd6c9aa313b62966bcb8d40196afe04c0706eccf80389dc4fa. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:42:29Z), 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/QZRUP2500460.