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 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 0xb12c7a109ddfa5817ee6da7953b0bab65adad08a6d9341cd1928c9324ec010d7. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22467bd3-41fc-4f39-a53c-a6b2acc2a584.json and https://artists.proofprofile.net/proofs/artist/22467bd3-41fc-4f39-a53c-a6b2acc2a584.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 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 0x7a8557d55d9b3b0134b11ae65e51e31f165606acfb53920e83b74bcc37978eb9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZK6J2187853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29381642cd1ad1f1cc7813737d134d2ad3c4a377853fdd391ffe4f7f6fe61f3. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZK6J2187858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96034e9cd1a215c74bf0fe2a5dfd9bc8053b299b567bfb58b5dbbe912f2c713e. 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/QZPLS2185832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6993d30b7ef8ecf0c0b5468384d8bdeb5a8d37c20c2d3c211a3ece9dd6144fbd. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZPLS2185833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1057e7a9886bfc140bcde3fb66347090fa585fabec11abecc4966b61653947eb. 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/QZPLS2185834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b6279e7d254c3f3fec35b5758f79db18db4415eb4699a5efa7d241df7eb373. 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/QZPLS2185837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7496a842458b6e680de46103c419844d011aedc057254258e1783b3a893798. 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/QZPLS2185838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc225c71902aa90de319f6a07504c32aa120f7004d1174d97d307e1a8099b72. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZPLS2185839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ebf0aaea693ec9460e3a0d1e6cc6931299564e5233697d12d028f37ccdfdcc. 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/QZPLS2185840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec51718bb35a861a8a4ba06095f99ca024288cdaf2d1cce3aa1c5d7b1b16e9d. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/QZPLS2185842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa01dfd4026fcc9171b6cd221d50a51e64c1b1c6d128cdaf8d0aad73a390e0dd6. 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/QZPLS2185843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a9868be7772d725adc380dab6cf96bd929f26b46dc77a3dc3424de4a6ba85c. 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/QZPLS2185846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b75b52c24c96f9a1c81f83b4eb42545a1e69c4e3fede4daf130948c3872812. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZPLS2185850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa7ce0f57b358d21dcf6d4f99524c5b45b00cffe52f64049a76f99db4ba115b. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/GBLPF6733317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b785b6fdd7aa432b8731854bc8e5cd2b7cf87c252304c5b98ee7f1f8cfff81. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/GBLPF6733319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4f0d2947cfeaa367b847aa4c3f1ab495f48cbc35c150f1a193f64fe36e93a4. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWFE2344936.