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 0xb1371d2d63f3da10bc090c905b123fbb5986232b7f36a6a68ed699766b98eb5f. 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/d1e49b4a-5792-465d-b843-a0637eeb18a5.json and https://artists.proofprofile.net/proofs/artist/d1e49b4a-5792-465d-b843-a0637eeb18a5.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 0x22046bd528222fb30f971eeefee1a3085bae4b70d2e6d7e71666c975f959867c. 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/QZFYZ2249272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f464f23e0416757de7dfa5792076c0b0d1e5238190816bfe5b2f00f0a73dd30. 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/GX5MX2420235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced155c976c14d8e5d299a202a0395be35c4b8f38737fa47401dd0debf5fd21f. 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/GX5MX2489329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1fda42beee13bc19da6aaac6848d5d4be678a62124d8bb5e7b05b53e888f6b. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:26:44Z), 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/GX5MX2466595.
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 0x038a5721789d6aa1bc6a0a93ac3cadb481fdc1d25708868e10c0427042f1a945. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GX5MX2482587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70cf56679d1629d498954d61fbafd33d4a93b483e607f01632db35a0a9e309d. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GX5MX2419040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cef3803bee89cd46d87f8cf47843cba9983532942d58ce68b0fa799fdc92fd. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/QZTBD2406992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261f04f7fe2da460da3e27ca8af7f168ab48479f8b5d0b55ae8d22a300f80fc8. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:07:49Z), 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/QZDA42596721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f048fe2941a2a391cacc24891752c77fcb0771c4bb50c545c1b9528aafe8a7a. 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/GX38U2382666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d0d41f09ab4fd2dbf53f4b9e762d477184ffb2f931fba60f2b7424346514c8. 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/GX38U2322739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15df63f7bf6f1adee7d96b9589884238f343d9c14733cd3daa133379c439d0e. 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/GX38U2388647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a063b023202b2dfc2339cff96e8bb1bd9af3d4ef81eca8d07da8bdadfed9b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GX38U2371952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c0f5c86d394cfe9e17cc4231ae09c0fe6232ac485f04afb91dfb994b1da08c. 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/GX38U2360244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3366684ac0517317beadd33708fbd5dd46caf79227e6e5d88e34c99ee6a732a9. 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/GX38U2393372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb02b85d926dc0a9949866c2387e19d0d9a781a2c5889e9f0604b86499e110e. 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/GX38U2342468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256ecf30b415c4ae3d621daa637d957e6f79b2d77325ca4379a93e5558346a08. 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/GX38U2399756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e4bcd2bdffd168c97961ea9f890f2ecf0ceebc9a45f5585194a2a08d3ea93f. 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/GX38U2380910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df3c6d9a508c3b1b20e354392367ed043c39b031d7a0c700a97169ccf6ef867. 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/GX38U2396161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e62487a036c0484172652d072de0df0f72b0b54a90cc70ff9e9a4cb33b83f99. 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/GX89G2289396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f02573a93087f54501a300b9e4b539208ef34953af894dc81bf1458d6da903. 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/GX89G2289397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf91ab73758c60fb01eb8cbf893636ff059e9c8cd93864c64505a2057f7a2042. 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/GX89G2289398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95c3b92dc27f80506395fb74d214602a09c37d13c3cc06a6da63c9a49f5e99c. 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/GX89G2289399.