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 0xb34db7e855e353434dcf426907297b7873e4e0a5337ae346c58a129afd96ccb7. 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/d4ab2469-bcb6-4487-9fee-1daadb2dfab9.json and https://artists.proofprofile.net/proofs/artist/d4ab2469-bcb6-4487-9fee-1daadb2dfab9.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 0x3f2953cfb4080f5ec3462e741350d4c587ef4cfd3f7d36ac021b79a36dea1b0b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CNZ632401093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24072459ee8c889fba0f6f03a5fa64965acf7b1a6da35ec6ec6d0381f329e7f3. 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/CNZ632401094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3021387fd76d4b9eb35b176b87cbdd882acca9d9984f1473f0d604cb003ccdfc. 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/HKG732426270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f9b696e14db337eb576a8f5f6f328734cdc881e7b0361dc93df434ccf82c6a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG732406282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f455e56dbc142246d7ee9497545ea271ef5bab62946585cb6720fb23601bc0. 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/CNZ632400581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e31faa688f51a0cab72ab9838b761fa5ad68f4626524a8f51901dc403b2c32. 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/HKG732404505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e6dfb70f3fe28ed320973178e1234f8670de4769044d99f6dc4b86b0f64f3c. 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/HKG732424377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b65e0ff527175e46d64451154fad11133f6e565aa87170a467eb4abbb8fc75. 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/HKG731682797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7874046da6daebd55d00157d769295c8178f8b012f921272ad62eaed47a18bc8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKG731682767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44ba499cf5e2645a1c95400ab901a7faee7d31e62647718ccadcc2630633559. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZZ972499262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0c724d377c05fb950e08263c0824e1964bc78b4be4e0406f74614793354eb7. 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/HKC992325628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964ef464854dccce23588292cbf9c1ccf9a097a6f6443363b35c6e7651ac9949. 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/QZZ972479953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a618a697fd59e09e25055e537e9b63f4b91e71a725229179a7fdbfbc0e2a54. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZZ972478858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53f07808a7583f01f7828760f9d3f57969c1cc2137108889c5d1ffc8dfa1b0f. 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/QZZ972479713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436f4ba388a4ee3c74c2327cf10adcc7ce100142570cc94e56be1fd008d24869. 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/HKD012237793.