SDM may refer to: Technology Sigma-delta modulation Seed-based d mapping, a meta-analytic method for neuroimaging. Software development methodology Cap Gemini SDM, a software system development
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 0x09e976b0be4e8c851d0ffe49cea2135c76d2b39e3c2e64da24c1fb49a5396f46. 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/a9341d39-83f4-4997-a618-b64d7332ca20.json and https://artists.proofprofile.net/proofs/artist/a9341d39-83f4-4997-a618-b64d7332ca20.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 0x686ddb585c15981330aee0f10810381c2ea83c9e485bc4245c89ef0f2a1b5b3b. 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/DGA0L2348767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d5b524880f1e609eb333ac98b9c511eaaa1c11069880a1b7e24f239dfdc51f. 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/FRX762406975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2337bff836d527feba69bc385f045a9111f5332c3be20cc818527db2668e1a0e. 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/FR9W12351248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0cfd36070b2b64a99d623433ffe24515ddf2f32a82134f476effd8515e631d. 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/FR9W12238503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2337bff836d527feba69bc385f045a9111f5332c3be20cc818527db2668e1a0e. 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/FR9W12351248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c28f5b8852c44252e4f919608fd392c8032a0ae866786ce016f0b6f746a49c6. 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/FRUM72400290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc2cdcdea169a4fc8afe2746036ce8fa46284dad662d66540033ab5c381e324. 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/FRUM72200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea73e69d0d8aa59a30e9f8776ddb07ea9288a74ff3ecf5daec663f5dac1c824. 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/FRUM72100803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08d46a07f5c633d602fdcc52e9946179222f834b0e0d12ea929c4dc3d4cec32. 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/FRUM72202505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275507431779f1a8df27f2b9fc1186d1e512d46d727538c6faf30251066cb81f. 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/FRUM72102322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea73e69d0d8aa59a30e9f8776ddb07ea9288a74ff3ecf5daec663f5dac1c824. 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/FRUM72100803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62464ecd2d5190a2f1a5a4819788b218f2ee3b8707da9c555081125bcaac3e21. 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/FR9W12339106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4648c2904a21558612accfae8987478bd729a2177d4a5b60fca8b05e35f1e2. 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/FRZ042201578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4648c2904a21558612accfae8987478bd729a2177d4a5b60fca8b05e35f1e2. 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/FRZ042201578.