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 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 0x766a584b4fbe6ad08f4c1d35a7fe313711c4823ae416d47101686ff738d749ad. 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/f06bfe89-3073-43f0-b480-ef85447d53d8.json and https://artists.proofprofile.net/proofs/artist/f06bfe89-3073-43f0-b480-ef85447d53d8.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 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 0x3f004f2f35a4e906a47c04fc2b63a3dfb42cbd32e33950af5b8987f60d2e14f5. 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/EGA019000697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a9d5e8ceebaf33a14cf7ef6bb07b7f74b63a2dec19eaadb09d92bba0581682. 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/EGA019000673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8d9174fd04ae0fb1f5fb4b715afc0a01f264d93338f6a49fe7fafb6b77e92b. 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/USHM21662630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78eeed9335ebdf3ef65205efdaa292f37db20d1dd5c2efeeeb1df4c4b5ebf6df. 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/USHM21662638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089191223fb4e4dcecbf553973515ad270b93902b88f59a1db0467a97360ef58. 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/USHM21662642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bac4e98e98c93a8bca8c93e29bf0bb706b32ba1379a7bcacd6ff2c1e0ba6cc. 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/FR6V82041842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1a9c044edaf9f23b164434d1f8ad5e27bd63ddb0270d296eb500061803381d. 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/FR6V82041843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9116c63512e4d5030acf305a9e2b798897deaf080d014863d72bb76193379639. 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/FR6V82041844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16a293b1764a617c5df6b8a1a49ce79ab711f1ff9e486c449b6f7028d6ab93c. 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/FR6V82041848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090af4724b81dead364335c46a77c91202a2722da4531b8f7371d4f4aabb36ce. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:20:12Z), 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/FR6V82041822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5145d737ddea486a2b5c5429696f4b629bb8034ae1643f03be749e62a50f50. 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/FR10S2589685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62756f2b729072ae7066ddfe03e3386e86a44b82cf603aab60687ea8d2f62dd5. 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/LBA132400422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ca0d0c60747cbdf27f24bdf5b4656b3f57aae74b9565fc065db95e407a4787. 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/EGA1K2102831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae83f30fd65eb491b3786f0702b88bc38c894a6db3b01cfd2c43357ae469f133. 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/FR96X1896613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37db592d353f9355a9326a7f42dbc0a2efbd418f7717283df5558b6edb35cfcd. 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/FR6V82041833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f1fd62f2e7d4c1b2130c6154d245f1a6c350dd9906f1325bc1f15fde89c157. 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/FR6V82041834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa42116da04bcc37718c5e2df32004724be466e94b8f3380ae7babdcb92e50c. 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/FR6V82041835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cfeab02484b47131a75ec04bbb95f259964376973381b2d1633e42ac03a129. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR6V82041837.