Mario Miguel Guerrero Abud (September 28, 1949 – July 2, 2023) was a Dominican professional baseball player who was a shortstop in Major League Baseball (MLB) for four teams in an eight-year career f
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 0x81d99f5cd254cffeebd63de161681c82f06d75905e9e33c38bcf078de5be4d26. 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/9314be47-76d6-4f86-ac5e-404c320aa4e6.json and https://artists.proofprofile.net/proofs/artist/9314be47-76d6-4f86-ac5e-404c320aa4e6.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 0x9368685500d9c1f759b74877fd431a0869ddcd694ee1ee0b0e887af8e6e6f373. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES71G1636501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9368685500d9c1f759b74877fd431a0869ddcd694ee1ee0b0e887af8e6e6f373. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ES71G1636501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64cbf3c1c36cdda3c6436f85de6ddf15fe670e4782ca7a3f99ea22b72dcf316. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CLAB20801830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8024e3a2cfdf67203e1bd907f17390de713bfdc10d9886be6b26ffe5667c2f47. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CLAB20801831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64cbf3c1c36cdda3c6436f85de6ddf15fe670e4782ca7a3f99ea22b72dcf316. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:53Z), 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/CLAB20801830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8024e3a2cfdf67203e1bd907f17390de713bfdc10d9886be6b26ffe5667c2f47. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CLAB20801831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6de3e92fe5461945d12aaabd7d4e64b39c0430ccb26863fa2f789c92fc17d3. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/CLRR21400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f4ae2731aed47206c98d2536338c3924585fdfff56fcede76dd15b7f7204fd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CLRR21400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33064af2215f166e4a2ff78969d485e4554a31583b17ac7d1894b092dac105bd. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:35:55Z), 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/CLRR21400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f4ae2731aed47206c98d2536338c3924585fdfff56fcede76dd15b7f7204fd. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/CLRR21400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd155a57b3d90794a925b85b4eee3bc5418c07e248ec77428b3f2a286930d1640. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES71G1712527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97279cae0d849ec149e0affce970529c5de939a0c35077a763185d2b489578a5. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES71G1742233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97279cae0d849ec149e0affce970529c5de939a0c35077a763185d2b489578a5. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES71G1742233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf7d0ddf1def3409720466c325c05982a468267053bc6784a6f60cef6342a81. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/ES71G1857620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf7d0ddf1def3409720466c325c05982a468267053bc6784a6f60cef6342a81. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ES71G1857620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f5768de587ba7b7b5ce0681281d37098b54ed611d932e05db7cd66f099740a. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/ES71G1927417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fb06e4b41e045820e450f8c02f5c7926a5e8afaf50bec9dba5f2c92a187826. 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/ES71G2057029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ca8606b2467b0dd0e4b459fecf038cc67e3e96a89a07f854877bea4bb6e3ca5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CLAA20500129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23215567cc6bb36b0f6b6175347adccff532bf7e12c80a33b53ba3d8c3275b9e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CLAA20300186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0812418fbf8922ce3674800d1f7d1275fa1fab042540b8e2fb7c1c5c89a60500. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CLAA20300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fda7e84708ccb33ecac45c89d82d6f591c1f04239d0637974df55ba61c33672. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ARIXB2300315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8eeb31e82de2faf380d4090e09688e17fb9c4b43d073e745f96a1488f68a02. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:00:33Z), 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/ARIXB2305827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cc92a104ace5dac740e35abf9ab7ba7fec27e7efb586a531282d9a101f3068. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:05Z), 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/ARIXB2312742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1037523dd6ce9722730b00f9239124138ad9a5cd79b68642feb82491d9dee229. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:03:01Z), 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/ARIXB2401516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1037523dd6ce9722730b00f9239124138ad9a5cd79b68642feb82491d9dee229. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:43:16Z), 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/ARIXB2401516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80b70bf6ee4e4873718db8d1d141403232e826aae99113501fc70aaa076f12f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA072312856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5028d220205c39cd95f3ebbdabd09e97ffba17470d97b02fe355f34b9b81ff. 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/ES71G1627097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb06f1fb7ec15a2d934a28b7e1c4fe9d26e015e1d9ab8735acdd93f169b5468. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G1627103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0d34da3bcf2af23036e4497d7d19c7c7e562baadb5580c42a4f68ea4c9f05f. 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/ES71G1627106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249b2f8b7578bef1d3998a46b4b03df97296f8a70298b5bebf1afd158d04d72d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES71G1627100.
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