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 0xe80db7205a9aff2ff87182680103f82124ec21a3290074066f31c322fdd3ae79. 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/0b937445-1735-44fe-b1e7-c58b38b1aead.json and https://artists.proofprofile.net/proofs/artist/0b937445-1735-44fe-b1e7-c58b38b1aead.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 0x7e8b6048cfb84a56a4ce3d860d7af4a87ab734c584e4b36571d6c8b46defeb36. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/USLQZ1001082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd296f4521f7792a193b99b3ad7ec5d14253f0e4182f36f3c299bc4cf7ef581b4. 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/USLQZ1001084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbe2bfe5f51c9445eb54cf6672a3ade7554a56546e5edd1ac65a64cf66ef262. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:48:57Z), 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/USLQZ1001085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546902716e953054b98480f57106df15079d6c0a5f409aa39acd3929ab3cadc8. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/USLQZ1001086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d2b20c4e6042a85d13c87fce0ae701e9cc40e3510fc6740b292f89c93b8ae4. 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/USLQZ1001089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628c0f7e93ba93b037255e71d12cd8cabbc089dbf02d46e430b7083092a1e6ac. 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/USLQZ1001091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49525a8aa8f97c12a9f209a9b52e7385d1e9cda88241fd823ad6b4723d21f4a3. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USLQZ1001092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ba297d3ef50ac30731f101cc0138b96181341b7da6d9bce868bcbfa381abbc. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USLQZ1001095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b50a84184df5d6f0cb983f8fbbcee5bd50707ec4ec55da4c88ba0d6a2d33f7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USLQZ1001096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1709990d2a98c87c94887eba0d195bc9ab459650541a3241667f4e8db3a0f0e0. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:10:17Z), 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/USLQZ1001097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e5205aed8929ebae0e4f37df51ed8b59fb2440d27000a9dc82e61f055f7153. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:15Z), 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/USLQZ1001098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad002817160a9076ff199d4d1ee3151288af9bb93ecf4f2969fec6b01f6a123. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLQZ1001099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7145dc51f9b4db5cc2051d1d7cf12bbdf6584aee5da25fe06698cd623ad3728c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USLQZ1001101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b1fdebc94405a1205256b7bf63aa82fccfe3acf8cb70246e92a3808b875b3a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMJYX1650501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef82f9a007448491b461f6709b8cb5c234bab1053df9011716b6242fef58bf53. 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/QMJYX1650502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c1c23f88816dee2b9500de61efbd179a2b71a99b7dc605278a1e54757e54972. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMJYX1650505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db4c30bd85fa5833d9c882e59bb3fd5bc7bbc8e856520e7bdf580f1f130953c. 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/QMJYX1650510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7008bfa6be995625dd64cd83736807e1ce6f6d2db267230c6cebe9b2b7b2997a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMJYX1650512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2891fbf417b383d56e764212ad5bebf211ea779f7bb78a4bbb79c1f64b91a59f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:46:52Z), 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/QMJYX1650513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81312ccfc509764ea4c46f4ae8d87f9eea642ea153c317e0b11b1a1eb9e58d6. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T08:01:36Z), 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/QMJYX1650520.