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 0xa2d7cb469217c887b8fe5474547f7cde19e2dce99ee3c39c019338adac42d27f. 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/94b80b17-e0aa-4ca3-b482-7b5c1ef7d206.json and https://artists.proofprofile.net/proofs/artist/94b80b17-e0aa-4ca3-b482-7b5c1ef7d206.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 0xf5d3d63f80c625c71ced3f431af9088ede2b44b66f38c04fae18f9c1d837d975. 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/GX4R52461841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d491824bc4ab7cd9d454ae952a54e732cb337f0fbd8346737fd5885acc48204. 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/GX4R52480514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d5c81d1d062fa14396adfd3a714e7c8187ecc90c949bd0102ee7b5c2b93a3f. 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/QZWDE2431159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa490ff4a80e3f0314dfe52c33b97c742bda95dfeb2e9683c14da42ea35640bfd. 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/QZK6M2482375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3429c80a6ddd8e8ffcd733dc6f314e4980394b1b4dea6f8b70a03df8880b30. 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/QZDA72428800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06fa3eca1cf77d272ead397e6ccff8c389ac7dd0e9f60f178d23da629559971. 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/GX8KD2494177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7105575fa5b283f84815a0ead9ac8c7d5768c9b580804446d5fdd4d0a393fcd. 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/GXBDS2385446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee6e643ecf2249eb86846bb564d31e1ee1e0b5642b13edca4b2e7c0cc0387ac9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GXBDS2377232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f65b1f2871044a59696ab4ad2cf23587b66a70c4acb0d469e847115bf89f5e. 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/GX8LD2317803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84520e569fc12e0847b7849eb7085437c8985257a3a3057c09ed8f033d887926. 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/GX8LD2391697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eebcd8b02a7a4fbef4309aef3ef88f06c4a3064176e7272e29c606c8c873f79. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX8KD2393731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc476f6c9553b5707a6b49589ea7b320b82c0e94bd751d3c11deefc9155b790e. 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/GX8LD2299512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3a711e10559edb83ef564dcff1a532a259ff4e1ba2d4e70a5e410e3be4c3d6. 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/GX5MY2298489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35879f66e6b38fba60ab7e72cbcbb414f6d354dbc0042b3753574ed4554f8330. 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/GX8KD2282393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb18aff16f7ec1711b6c25af8b589f8e0ecaa9e03f1b7ee43df18649503ae82. 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/GX8KD2281772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dabe94d585823873bf0eed2e7b3e51d1ae9d1dd4b5d449196598de969b9be63. 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/GBSMU9661068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2fa18629b4587f7e5ad6bfd4c05ec54e7b1cb199c9c5fd82e8129251957ebc. 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/GBSMU8990429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc388957fa1b6824446475562e16e5a60cae53ceb01b28194633e10243e9c94cc. 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/GBSMU8939073.