Lamartine Babo (10 January 1904 — 16 June 1963) was one of the most important popular composers of Brazil.Valença, Suetônio Soares. Tra-Lá-Lá — Vida e obra de Lamartine Babo - Ed. Funarte, 1981. He al
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 0x99d7ed31fd9de1531628f9968a89274387266bad70b5782b6bc1feeb6bfe1842. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4f1ca0b-5c66-4c53-beac-a6db1f98b4ad.json and https://artists.proofprofile.net/proofs/artist/d4f1ca0b-5c66-4c53-beac-a6db1f98b4ad.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 0x56ab81cb60a083c433deae25bc360407e5892fa125fbfaa390cabf5cd34a3131. 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/BRBMG3300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583935a183c27fc3a2ac29884389e030ae8ebec8abbf5de873dfe74f56bfb465. 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/DEUD92377192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c2c8a857aa1aa341f83f5580684651170229bbf3a8fd161272d01b036fd924. 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/BRNIK3000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dce245b709d1a0deee79402ddb13100efea663cc5da64bce6a0936dac8ff36b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USESK0618128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f28176d8f5ba59684c6cc1fe50fbf0208d7ad444504895a662f95820ddfdfe4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USESK0618285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd288255e8b6baaf761fde95a460fc3466809dacb4b235a2196b38eb471ef05. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/CA5KR1943093.
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 0xa1168d5aa9eed1644d06b3d766e8c38820c12ea9575ce371f16d0ad9f60a9d1b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CA5KR1943096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ada5fe7cfaacca5f5912665c10759fc39063dea5b270cdbb313165bbc87cfe. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRVWD1700368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f162a52331c65a68f358ceb4b758850d8049aa6538bbde1aab1168248275355. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USESK0618267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9efface257c4a75e42ab2d6889d530fe2c75fc618f66217078e62c5c201163a. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USESK0618277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb8e1cb9c916fe80a969243138e71ed31631335c3828d8856a7f15aacadaae4. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/USESK0618116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb0b04db38c22cf8b84d1f6d0e385d0a625782435a7ce0598eaa47368ac8906. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USESK0618280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c055267e3f04022d7b9332b9870d7010f148565917ad0743bce3b2fc4c6f62. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USESK0618294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5386cbc8319062c80a6be7b4ea81019fd301b0eb50eafb4c14d31aef3bcbd893. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USESK0618297.