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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4450144040967f1e26457ca29b7a29f4bcabea95d68b5c1555be3100410806ce. 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/710f31d4-286f-49bf-b7f8-53b1c45e319e.json and https://artists.proofprofile.net/proofs/artist/710f31d4-286f-49bf-b7f8-53b1c45e319e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5848a2d821274f9a86b6deac36057072abc4b96cba13345fa3641880d8726c5. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:16:58Z), 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/SE6I32471713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f004c6664eee9aafd79756a50ec3af8536801f3fe1a61fe737809940506bf71. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9K2304357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdff185d0df3a5b855f5e465438e75658b309a23336d91c2206e830ce7b31ce. 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/QZNJZ2375853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452496f8ccba9572c5958af0c215eb11f6280e9cf05df214e458c3fc353c71ba. 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/QZW9K2304362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aad1232ce739d129603e450d74ee41607b9451bab568358948b73e5bd5682fe. 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/QZW9K2304363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fa8cb560c7986d1922b2053cd36f50c30003fad99ecea57782db1bf23903e3. 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/QZFYZ2331758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8103d003b97f9752259ab63be267596dd15d47ec3cfb3a5fdd19d040afe04bf1. 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/QZW9K2304365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967fbbb9d5e865c10c89b97946b3a0210da04b88564857c8e2451db5f2b00bb5. 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/QZW9K2304366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d00dfd60a066c76140d5b4553199e45fbc2747ec358278117ca30b51274dfd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9K2304367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61de0899e4b5d934678f9ec458fceba579fd504c86e43d947a07229ffa4c2b5b. 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/QZ5AB2406507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc18338cf812040e398412e1396dd12f24491ee9c2c6ba85491b4269228ae4ae. 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/QZGLS2440961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1d5a0716b7ddfa56f7f85ce566e13573a414f318bba74734b8ecff3b94f1d8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZGLS2440962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3dab15a15fdd6fc435c2e665843a6a5eef9fd793535c8890f801166483fa9fa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2440963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdff185d0df3a5b855f5e465438e75658b309a23336d91c2206e830ce7b31ce. 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/QZNJZ2375853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc8d60c846e6f6aa95936a9ed5f626f9dbdf81a2d8878822e4ebc5f2d3f72f4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES62332987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fa8cb560c7986d1922b2053cd36f50c30003fad99ecea57782db1bf23903e3. 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/QZFYZ2331758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48cedab11b84505fddf068d64c1cf1f4b705bd4080ffe39d9a03ad222cb3549c. 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/QZHNB2234278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a1c6ef51e560205e0cb4120b2b23e5280449426f8a9099e6342115aaac3950. 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/QM4TW2262998.