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 0x9d0b83f67e2252abbdf2e2c1d2d05a42d4fdc15873b60f416b26416bd36f0723. 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/70f12ee1-9b58-4ba9-8f2f-67d35f2161ad.json and https://artists.proofprofile.net/proofs/artist/70f12ee1-9b58-4ba9-8f2f-67d35f2161ad.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 0x6035f291a7ac54ff65df0c7463ed553d18cbaf4ee2b06b6ce7da91f831180e05. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCJPJ1966574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e68ba0b2fd3262456c8bc6b084f0099672cc120b6a52c7e93a466ac151aaa1c. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCJPJ1966577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef6ec9a41145ac3e246657e4d1da8acc6342e72a1b478a521c745e84a4fc2f1. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:09:53Z), 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/TCJPJ1966571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f4647864c1b9f24e7507da0720f89016fc975315c9b1cd8083003eb7afe8cb. 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/TCJPM2010802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac281a8185d15b5d05990f8b2cd5585ebed73e0083c6e9860b65c069e4a4c335. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCJPS2255817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d1b48539bc86922198f5bd82924a2689a3bfc5540010954992f6b9bb86ff5b. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCJPS2255829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee84c8fa7bd7b8a4b8f11ba16267f0f8601203ad42d48d562f29ca3c58d56b0f. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCJPU2213690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7661857b15cbe9325d74199d226fe01001a2dd183cbadf52df96e8f87b8150db. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCJPU2213697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ed3339abf5e9e4a73d5067652c0fdafca472a5ae975b2b1c6a593167eab1f4. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCJPU2213703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa97d16491b6235fe58578958d57ad22dfc4ed3f07ec919264d1f3460119442. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TCJPU2213695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a830e9a81f2ea30f9c5ddf64f6b97533b5f45ab29c86946f155626390feb28. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/TCJPX2301923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc5f23c6c3eb823ea9dfde99b75175899a4296eb2e6a2a976bfa924f4d2c77e. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCJPX2397437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331e0e51ea62ac0b70f30b134b7e3790695ecc4285a9c2ed40cf35dbd84b0dfd. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCJPY2324770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8583d299199020a8a3939cc0c9e65cff84b4df28f063514a08260ed5819ec6c. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCJPY2324774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc5f23c6c3eb823ea9dfde99b75175899a4296eb2e6a2a976bfa924f4d2c77e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:53Z), 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/TCJPX2397437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cde4f61b677e7dcb4ee5b5e46edc8eb2282f5fada5a30c0361ab944b2bfb8ef. 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/TCJPD2538610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f944ed3618ee2ba6edcbc39ae419893417a28a59b677bac3b7033dd7ad99b9c. 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/TCJPD2564159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5ec1ad79c1036348d038064f3af6121f308fb7ea351d01b443a4b618d48d0f. 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/TCJPD2583883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9840d1b4998858c3d05b6e65ef848438e575ab63f90155764f0fd8159847e198. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:31Z), 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/TCJPI2506322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730f3f0d42d38a750f51c5f2af98aa68bba025e90b9fb1a2c435083797d92c5e. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TCJPJ2538554.