Saad or Sa'ad may refer to: Saad (letter), a letter in the Arabic script Saad (name), people carrying the name or surname Sa'ad, a kibbutz in the Negev desert in Israel Saad Esporte Clube, a Brazil
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 0xc400b616956f8c3063c6cde5fceac1f0bf72d8578c4adb78ff165f4469934d49. 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/08dcc334-19a3-4dce-bce8-e8a3e32f9b9e.json and https://artists.proofprofile.net/proofs/artist/08dcc334-19a3-4dce-bce8-e8a3e32f9b9e.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 0x554fd84b5c5f0b949540d4bb11503e2ddb8feab4f9b9f4cbc8e391a3855e3591. 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/CH7812178577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff10efac2cd1bece4af15390b95b7fb3d020f74319b3be3eba699a019aa085e. 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/FR59R2307031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdfb70fc6509634772a3a96427e3a92b8f88e92e1c1854debf339886003532d9. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CH7812198282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0ee43f155d3f8f0ff4391faa7ff586904a79cfa1239795c84fefc6aca2f594. 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/CH7812198283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3744d82fb8e03d4b461f049fdfe25c5e0b8b2af79c9c89bde99ed8bc3f68b9b4. 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/CH7812198284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bd9ea869b6db534d60ae7ea44cef038437f20896c94faf0c9ee5799a448279. 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/CH7812198285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c1ed5efe806fd6e43842b3045eaed2332343600997b55e325a60dda3438197. 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/CH7812198286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb01094a372eccfa193896be99ea1d8c477b940723b75812b502db3b51e3cc3. 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/CH7812198287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00644bd383091fa291e183d2315c2a4a5f8e933f4d822ef3c94233735117fd95. 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/CH7812198288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfd6e47290f1b224f04a7efd4a0deb4f1840d0a3da07e6eb223d40e2378973a. 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/CH7812198289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4a05860df4fd6b101cdf1a6bf2fc92dd36fccce323ba5d35758617c79ed053. 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/CH7812198290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764fe07e348fda1b45b3d0f07a69b0010d00c912d94614fdeff3e0372e80eb70. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/CH7812198291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be39b6f602c9f70966a8279e1ef91ac8425e348b4f529735043d8ad94e30d12. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/CH7812198292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884060ea64fc5723b972b9727da2be47ebd63460bae4ae27c757c4946960c76a. 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/CH7812198293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2888e76799410e83ad603411353d4f776ab3d1922a3d6c075cddc8cf1fc935. 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/CH7812198294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2461e208d0f2b3fe2fa7c1410b64ce65eb0d5c0912bf51fabfe9e5225bc9dc80. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/CH7812198295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2575be4d38b43927909c2a73932e8245d56036e896d3a68689f49bf108b38505. 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/CH7812198296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de8b4c13d42b925031f065ce0366222acb4fb3ab9d810cc8150bbe56d86bc8e. 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/CH7812198297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fca4cbbcc98086948c98b1eb0b22fa43232883effd2c346f9bf3a61b7b8cbeb. 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/CH7812198298.