Maad (in Serer, or Mad) is the title given to a male monarch by the Serer people of Senegal, Gambia and Mauritania.Diouf, Mame Birame, "La société sérère: organisation et cosmogonie : essai." Éditions
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 0x67f0edc0ce6931232de43d60b18f3a494c96596dbd1cc7a058aa387ae4019fe6. 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/82853ca6-f821-4085-a1cc-287d66cb97a3.json and https://artists.proofprofile.net/proofs/artist/82853ca6-f821-4085-a1cc-287d66cb97a3.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 0x6676b8a404b8952ddf0a0b45064a2b4848bfd4f6ff59e536389d1912304019c8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USLD90814576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b0d63a795acf71e679c09142694aecf7fb4781f1e48a889da64d9daedaa79b. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GBKPL1776250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75415ad7a2f35dc47da249c7c90d00d8e42a8d074313f1c92a600a153c0d46e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR10S1800141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919602fb3f0b7fc48153929052021860a0dd801c7010fe20facc70c088d77550. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM24S1902188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17dadab80769a560901a8666f158d6d91be362210c8f5f81850b91e05c4aeb51. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QM24S1912335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe47d692e60f07867d9e4853b89dfcd9032056b689b12eeabc72137e747b70d. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QM24S2006910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad495bbac9736b3bcec81393816440fe60b76fab6bf3a232422d55a6aab1f6d. 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/DESY21401246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4770d8eb71ad511ac03d5036cf97955ef2e1def2aaf31e09e604d06c3ec5dc1d. 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/NLN1H2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46baadd16a5ec615f68c3010ac916e55f5fb4d2fb9650538184e9a4590496e52. 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/NLN1H2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46baadd16a5ec615f68c3010ac916e55f5fb4d2fb9650538184e9a4590496e52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLN1H2100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4770d8eb71ad511ac03d5036cf97955ef2e1def2aaf31e09e604d06c3ec5dc1d. 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/NLN1H2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f2ddbdbad65f9a33683bbeeadb9fcaf33c9dbd8d99c939e3285a0cebdbff36e. 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/NLN1H1800001.