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 0x5f4104a198833aaa218e4ee75f28af36cfa007357c1601b076978e418149c1f7. 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/bef2f34c-6d66-4c0b-be5f-32850164c6cc.json and https://artists.proofprofile.net/proofs/artist/bef2f34c-6d66-4c0b-be5f-32850164c6cc.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 0xcb9b992518ebb3c21eed3006bd1dd4f03f0a278a9a13bdeecd9e9fb772b45ffe. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:01:13Z), 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/QZTBE2409206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922beaa1f73bb1830d51d895a025e5d3e5849c3621da014bab52a9693055122e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTBE2425142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1b99f10e4d8f16b939c5808a0b53ddf266e4f8022c5292e5d7c8aafec32ea4. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTBE2409210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41340c0e42cd8c98a6480af2be5146ceb3cc39f963f63e8195e464fa397b0ec0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZTBE2409209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b3bb042dbe32128c7aa028c6d4b373606f0390709e20fcf16aeefa8e33b57bb. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZWFE2463522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf839b096b168299d98544cbfc1216baefda5655c98d63159ec249a3a8b9ea7cc. 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/QZWFE2462003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfacb30a57411a3f628231a51cd8646f69274eca4566bb7f6e227b08c64b59f6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:05:14Z), 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/QZWFE2463521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e35c97809b424a22e10aa90fcc7f87821cd8140e6cee6ecb8600f64d5124ebe. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:04:48Z), 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/QZWFF2436564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a1e70fd955663f9616aad1b40d4e6bb4afbcaa7c22dd392345d00c904f5239. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:03:10Z), 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/QZWFF2435540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab2757d92515df68349d7e4b8b56f6464f51275d77dc99ba4d7c7580b940731. 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/QZWFG2414283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac0d063073a7e43051a31819b310bf0165bb0b36c661d09e966aa9a92d9faae1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:08:29Z), 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/QZWFG2414288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9203995220a4a6a9106c9e3b58529b443ed6faf104c91ad4fa35cb5911bb58. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZWFG2413265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5453c97e434dc5636307d4b9408455c2be20ffa0840c54f71a253bc318e0a0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFH2497287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15aaf1b210235d2a3b5a64279dc8baa238676edb79485bf88ec771f3ec3851a. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZWFH2493914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe533349523ecc4d9fe44a0ceaa5f8b8fc03a5e3911449b49350faa4e306c3819. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZWFH2497285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff40d811d0e4d747c49a3dce3e658fa169a1e1033118f9b57f2ebe0a62e87c41. 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/QZWFH2497290.