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 0x41d214d669864cfd7a8bc1ea86e80a3b6c42497e9675350b25b7f9427227c489. 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/12e096b4-5282-4485-8167-fcfb34f7ec1c.json and https://artists.proofprofile.net/proofs/artist/12e096b4-5282-4485-8167-fcfb34f7ec1c.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 0x1241501472cadea8e61dcba09dcedc5063b8601acf9c92ebfab38f0851bc6421. 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/BK2NP2400272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c7a1c279919156304f32ceea60c264bcf69ecd02986c80f700ce868dfbd958. 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/BK2NP2400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ca1df0cdffefc895dd420b380929c73ac0ddb2ab74e6a0f723fb54fb99c05b. 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/BK2NP2400274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe786ea2b01e494de7d0e480fa66a866eb8b6d096f8385411a5a83a17657cfa83. 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/BK2NP2400212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fda5b168b37ff329e94a0a547de45b41a69eb6cf3425b74be584e40e6d2bc8e. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BK2NP2400146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57d9aa7b407f421f5db80998c0ca9e09dd15bb67fe3d9ae7ed7a98627b50249. 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/BK2NP2400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfbde9744b26c098ce9150a9d9e4eec985c65ac9484656f3be674118b8f580e. 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/BK2NP2400145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60921cfe44a96b8dcc6098fdcac5a2ac38c4c20ab0c6d356097a4e256da621ce. 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/BK2NP2400143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ec8e3ef383ba2cb1fd9c01b5ca5e48135a8ff44863e1d4ab91e82939643ee8. 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/QZTVM2428361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae60f1fd16d3ec26c746660e0331efc2a6a22ce87be6b4740a579ba2b5383e6. 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/BK2NP2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2deb4416dfa620e94bf82f3883150aadba8391e65cbc44d8c854422eb77dc2d3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BK1NP2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc615a42ba941eeefdbeabb8aca299113ec76743e07d279aff11a87d862d6528e. 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/BK2NP2400142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0081dea99e609b54b8316ffcca1270b3e3a36f2dd16311c0aa59d1b4a22bf65b. 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/BK2NP2400144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c722e38c03f071d4c0f41c99308cad204e2a041efde32e0e341d46df3068b0a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GXD7V2213403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c9f5c0a45c1e247c11681483a4be1096c0e890d124a4aaa785c9dcf41cc185. 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/BX3SG2400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee9c9bbe99ec24f4ae6bb6dc4b29ecd750cb0660740c728db0673e2a26f0a4a. 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/QZNJV2483147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3603a5df6b2c5efc32f1cbc21886564e8758ec7b5baeda3159d78f88f4d354. 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/BX3SG2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd0e33c62dc309406c4464b0b14d7fb51e5012469276d67fb772114f18b0bcc. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BX3SG2300116.
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