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 0x2bdc301298cde30efba1ee57eb3f155e572b55688cc08c27c3b01ae1cdfc0393. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b097497a-c736-436e-a60d-d20e6394deef.json and https://artists.proofprofile.net/proofs/artist/b097497a-c736-436e-a60d-d20e6394deef.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 0x324e7c2e09e514a35723f45069c642220cc26fc6d9dd540973ae58c99246e058. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZA78E1313879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfbfbfb205f23c7f77deb41ada57a5b54bd4686dea90ecefac89f3ea44dc54c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ZA78E1313880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e9a6a2c7bd6112112f294824509dc7023dc53e7877262792b6db1c7fe949bd. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:40:59Z), 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/USA2P1392578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e098fa14f642ce31077892f3e49f5d58c7596cddb94d527c2d4f8240a07257e. 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/USA2P1392576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd82bd68351064588acfc4c9e2cc13fa099b1a48ce153bd831756f287515c1f0. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/USA2P1392577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0c4917ca50f3f4340aa114c7210cf71d5c9e87aa7ba49363bfd6c282517c9b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ZA78E1313884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57129c4648f040067af10b3e19b0cfe133bc661e6d2237464ce5764403c3d307. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ZA78E1313885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3ac200a3137e1e5eaff6c8a81a0750b6522ba40426751bc9352c241c199237. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:51Z), 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/ZA78E1313886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ecb49a5b12401c48fa5bee89934bbc15ee8af02228db64637238ceef4ed7c1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ZA78E1313887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be60f66418339d46155348aebebf4c544c80ec51fd2b14c5857adf991088679. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USA2P1392580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae38d991cf60ea442422e0622e79843f7aaa088158457bf818676a5025fe51c. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USA2P1392574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450714ac08dd583096e3016dea564a24e7678c7cdb30561b19f9612204fe5dbb. 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/ZAC030700710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9d368c7eb544fc205b5cc06ba4702bacc356e96e96c4647ab7882a549dc2d3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ZAC030700711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a783c729ffadbb28ccca70be8f61775956fd8263a117cfcf4150ac3a2f8bce. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:29:55Z), 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/USA2P1392579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754aba01e6bc2cba5321b272482d80ed5516506dc4a46250ac0c186fc098ad27. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:43:02Z), 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/ZAC030700712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69420a9d72a29218bd2ef213bc49cb64c7eca83cbd7df8edd6512be1818ab71. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ZAC030700713.