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 0x61a9f8a0c0d8b86d18b69fbed5105e058c744f86cbbe0a6ff86ebe10a8ef21ab. 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/dacc2cbb-535d-4b71-807a-2665601051ab.json and https://artists.proofprofile.net/proofs/artist/dacc2cbb-535d-4b71-807a-2665601051ab.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 0xfdd6169f6e613afd64168107ea875c5bb34433c075537243d9c3cfcf5adae005. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:36:54Z), 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/QZHNC2513922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe733a4e4944071783be0671042fc81bb30fb702b0fc1e841291a2535a4367c0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:30:18Z), 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/QZWFT2497601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe318f7fbc426fa45e48550be2232a6aeb6b0ba60abffb268f7d3baae6f2e3445. 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/QZWFU2415636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd545f7f292d9e46957a2741bc78a2090e7d24a1f9b56edb09cead5ebcb988047. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZWFU2418834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88ebbe13f4fd5009b984472f1247f4f40964ef04dac6fab69fe80273815f309. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZWFU2418875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b7aba644e9219eca31599f53dddf34883e08254adca691fa8e414d502060d9. 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/QZWFU2423722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a58d6111ebdb0351e16422d9e2250bca9ee01c65f5c8231aeae91b9a1001a92. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ32565736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a68e675800a6c490425fec0c2c5fbea953a816dc6dab85106107aaf6059cfa. 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/QZFZ42558305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97d1c56afca763ef1e30d39041d740ada1d1cf6e4a99123a529fc75fbb7a89f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ32567372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81854f88994124afab9c99ad571069073bf72e9bdc22f9597ae242ef3527789. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZFZ32572160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b35c385f79162ea681f817e4d75e98d7b97f938dff4ad2ee2e8f8dbc9b5631f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QT3F22534967.