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 0x007545d278206d31884eacd3b1d1363096563bd21da13970d71364e7ef381381. 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/584a54b2-7717-4c09-bef0-8d6952848ade.json and https://artists.proofprofile.net/proofs/artist/584a54b2-7717-4c09-bef0-8d6952848ade.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 0xc3d8e892835d79dd32ad866e5fb64a18e6959a03d33b5ed34f0ac7cce7d388d9. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZHNB2120978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e1089d99869f5bfd65a84bdb3c706eebb7fee4814c9ea5befd47c31b22fe6e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZHNA2126606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a1a1232c15a407aca8593479eae35351b105bbfc5d46d93fa821976ce06840. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHNB2120984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168fbe0c6d1f0b24c139f39a6c7412ad8c71e96606a8430a30935af49f4218d7. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:17:02Z), 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/QZK6G2317006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70afc4815c38cb2b4dd2518f3b12257c2eb409f82edb2fb4219348aa80b9947. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/QZTB22337239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ddd911715baca9dd659c7914994a61ccd8d7e5ec206263cfc0d82bf6251b65. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBWUL2573513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ddd911715baca9dd659c7914994a61ccd8d7e5ec206263cfc0d82bf6251b65. 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/GBWUL2573513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb303b797f883c9bd0fc9ac3ac63d94a224991b2b2a3cc53b4944bc21b98f96. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:08:37Z), 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/GBRKQ2529386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1e3ec784acd269a46f783a0e8915b0f50a072ae9bfd9124b370160650f1995. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZWDD2570410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ed013fa121c933b109d46f9082aaec38c58afe573fefe650e432d12d6a0c4e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZTV32567460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb303b797f883c9bd0fc9ac3ac63d94a224991b2b2a3cc53b4944bc21b98f96. 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/GBRKQ2529386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28659c2ad42109841b3014f68b75b99f28f69beadaf2c07a794043cbef5b3ce7. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:42:45Z), 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/QZWDD2570424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd90af1ec7319c869bfcdd6e7e36b4cf019d3eb7afdab021b1853c521a4084c3. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWDD2570434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eb94ffdfc56926781903de7b3faa0270aeb23b5783bb9d89b62028a674923f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZWDD2570448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefce975ce9a951406e570efe3f1dc7f3fe6b261e078ef65739312ec22fc0d3b7. 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/QZWDD2570590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750e432a044fb24b7613b69154faa7f1cecdf920abed3c229ec4d6370bcce9d3. 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/QZWDD2570603.