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 0x155cdae869a9fd609788b3c79cdecc1487594700f51835b149591f82ae8e88a5. 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/f854253b-2978-417a-8ff7-110eef7ab1c9.json and https://artists.proofprofile.net/proofs/artist/f854253b-2978-417a-8ff7-110eef7ab1c9.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 0x204250aed99679573ead4767f82bb39c4e837ea7ab5a526ab254dbcba8e1e83c. 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/QMFMF2036170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad72d57337e5ff5aa3a0f7e63aba8a91d2fe4737f0851aea602286224228c91. 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/QZDA71930214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b679eef9f98542c514e46da85f149c9596a24ef499cf0ff3fccf7c439b38942. 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/QMBZ92074573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3538662ede6984f3afd2ad6478fb4edacfb53dca22ce7e197afe31aff2904f2. 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/QMBZ92074574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf1c81025b1187674aed2aebd15eaa7a5356a0eb65f417d683d8afc154fcd46. 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/QMBZ92074575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa103d4d5671f21cc193371638fc4a01aa37ebbf8a1448c5b37e85452e198291d. 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/QMBZ92074576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fafefeaea1b25acc0a4a24a6d1b6851893b409c0abf60347a457bc4e634b2cf. 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/QMBZ92074577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3538662ede6984f3afd2ad6478fb4edacfb53dca22ce7e197afe31aff2904f2. 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/QMBZ92074574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b679eef9f98542c514e46da85f149c9596a24ef499cf0ff3fccf7c439b38942. 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/QMBZ92074573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe703143436c712000c3e0a8b4631904337978169d98a268b34f629fad5ec35af. 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/QM6P42013347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97677cf2938844fb0a3d3611328951161e5a2bd8c023d798e52e7ff9166c854. 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/QM6MZ2063303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20596355232899ac630ecc71adfc31451498d0c015516e798dbea402f6b02c77. 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/QM4TX2036151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540d4b81a02aa356ef54f867fec76d88f215c3b43f92029c7d3c95ff8d2ce8da. 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/QZK6N1992551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb131d9e84c6a5effd0675cb12031bdc5c7035b9de3a18785c95573127d0a8c73. 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/QZFZ31951450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569925b2c481ddf31b3bed0a5042d8dde3f0ba094fd16b2d7b36f7afee2fab0e. 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/QZFYZ1965831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad72d57337e5ff5aa3a0f7e63aba8a91d2fe4737f0851aea602286224228c91. 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/QZDA71930214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5b121834a0482298a37cd4b5b76c4c8cf090da73ebe6ec1290461acd0fe011. 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/QZDA51995614.