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 0x8e5ab3623983f45620ff920a71320f94368107e42ac352ff7baefc30c9dd8a41. 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/6663af87-97f0-45a9-aa58-03d99d4d9cc3.json and https://artists.proofprofile.net/proofs/artist/6663af87-97f0-45a9-aa58-03d99d4d9cc3.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 0xa70cd9495da411c1571af474675e13032c3e2ccbc6acd56945a3e33a5b197977. 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/QZDA72013835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37f0336cbd0d1000f7fdd2b29a589640d312138ffd852584325c593cf1d63b8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:25:42Z), 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/USA2P2111057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77851c1cdb282d4a834861646630c88c1d4c392abb2fe3059c44ecc4aa3afac. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USA2P2111059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2378656f7261f99b2455d5f9c3af7a6842aeb8cc579a59239f5334fabf384873. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES82388016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab10c658d807012b1495fd6c101c41728e004627a4bbbde74847007991e66707. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZES82388022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4f8d8ca5f277bc173531fd4e8b67c2be0d39af99424dbde35b01d1fd29a3e3. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZES82388023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fd54032573a1291e23acd0ebdec0a12cf1cb4f35e1ccab141fc964ed99fc9e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES82388025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b025d2c157de822a603dc07acbd6e15a1d51df9c0b51f50653e787a61d405a. 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/QZTAY2552121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f65e09d844d287c7e052ab35c68399ed8eba634da393742054fc3660839a81. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZNWT2590405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6240ef5fbbfb5003dfffe51368886e249cb476065f4dd6d0fc805584ed9d508a. 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/QZTBC2575966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe44531f35448d574a665cdeb535b03f5b86aec33e619072bcd1d2393932ade4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTBC2575967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e53646ef705455536fc28f6d94f0219f331562543acb5cefa37918dd29d5f29. 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/QZTBC2575968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5615c042449f1b2bcc813ac6d75ef2ec52a5629b06f3d6d21db0db1435018f4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTBC2575970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a565640d5f97cfb2757e09f8a4a2333830e8e95db2dbe2440860c68a7b35bd. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZTBC2575971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddc0feda95edb03a7d4276889da36d2e26bec380af655c5cc198ec7ad91e4eb. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZTBC2575972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31e6e349328b337fc0adedd5760a5533154ab8f453b26640002ce4ffa746920. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/QZTBC2575973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270008451ce5eb887b86a7fb527c1bbf66b5004e533795531b53cf2be5ee1994. 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/QM99V2508501.