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 0xe71f2ac107a00735d25dfba0381486b9b0462faba02b7cb5fca50c47892c4ca4. 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/577ffcaa-03aa-4c50-b645-4b2284e5e21e.json and https://artists.proofprofile.net/proofs/artist/577ffcaa-03aa-4c50-b645-4b2284e5e21e.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 0x94d11f53e24f3ddae28797d089302ba2e1a1405b74108b5e76b9580e371c8d0b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CA5KR2293154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074c21d4fc6520a608959580c867942e95e846bce8945346a628d63e9f47e309. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBKPL2290671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7313d605c58c2eb3c1c63e4044c0a61a91e65f47d79954f16f247be856b241. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBKPL2284507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd82ac42d77880950145f9f95e5aedd0ae8d73a18fd7fe3d98120678d173cbf9. 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/CA5KR2293155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be4bea6a17327c33f8b2efb7fd6df3e25557e3026231f6c39650237778823b2. 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/CA5KR2293156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f8e4b11a61140c94297b84931dc64515722724b73d28786a8b7e256b91cbd3. 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/QM6MZ2338966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5355476c89396ae9e51b24d72a050751067e202699862f6c940d00333b5b0ff3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ2339072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29817e33acd8637093b696c49b5516e68e0ebf15274f74b778e44cb607e07e96. 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/QMDA62269493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70b6509f623d9abf312dc9bf642c8dc8c089e861f5960210494f70082c247cb. 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/QM4TX2330844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4d93006cfb628bed366846444f15dde9e7b4d0a0e6f05cb0f047aa0716e9c3. 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/QM6MZ2339112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef3cbd6add9eee9d53b245fbe8e6108d51140ecdc27676625d1f9caab69d9b4. 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/QM4TW2365453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dcbcbb75986c041e37dd25ffe451403a172fd9721b78302701c839308fc043. 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/QM6MZ2339130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43976367d0da36ad608de44456262c945dab6e3efd4a3eab555a43fbc7135692. 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/QM6MZ2338454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83de0ccd09df3bb1c5e91a38a4056e087b16f1e8717afd41b4e0d4ae3a0155c7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6MZ2339774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c4de773ba34adb137ce9d07fa7ccf8936cbecbfd9af2dcc64292448f6ae28d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6MZ2339957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43976367d0da36ad608de44456262c945dab6e3efd4a3eab555a43fbc7135692. 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/QM6MZ2338454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70b6509f623d9abf312dc9bf642c8dc8c089e861f5960210494f70082c247cb. 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/QM4TX2330844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef3cbd6add9eee9d53b245fbe8e6108d51140ecdc27676625d1f9caab69d9b4. 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/QM4TW2365453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29817e33acd8637093b696c49b5516e68e0ebf15274f74b778e44cb607e07e96. 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/QMDA62269493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70b6509f623d9abf312dc9bf642c8dc8c089e861f5960210494f70082c247cb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM4TX2330844.