Serro is a Brazilian municipality located in the state of Minas Gerais. The city belongs to the metropolitan area of Belo Horizonte and to the microregion of Conceição do Mato Dentro. As of 2020, the
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 0x6a0f63a994b0fa85986beb77a2a010ed798879719110c8885ec29aa4ac3abeb4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ca9b556-bc60-4c2c-9d34-d7bbbce52c02.json and https://artists.proofprofile.net/proofs/artist/4ca9b556-bc60-4c2c-9d34-d7bbbce52c02.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 0x65e5f151dfb4f54751c8a37cfe794d0a375b0ae914c1e22f46fc1b6803c1c1a3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:49:11Z), 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/TCADQ1899721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb9625b0a820f98b814a6ef0a3caeb255b80d6a39605e36cac26341b5b29ccb. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:04:04Z), 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/TCAEN1998835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c1e2ae2d9b2e19486d82b68c695ee30629b9750fb2c7fa7f3c9ce8da93ae41. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:28:57Z), 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/QZES82003153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d8c5066d6e611dc94c1caf1246502f379a25d92e7e3e77ebd7f5c882de1640. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAEL1922705.
Kasyoki Wa Mitumba [Bonus Track] - Soft Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8affedfab6aa4091e23b9cb60ed61e476c80d1b71fd364cc70d369722ee197bc. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:19:12Z), 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/TCAEL1945640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd124b05edee328043dbc96758751dc665a538d5b6d0075782a84db6dba04965a. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFZ22281132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99a20ecb291f89b6387d4709d79ea688f6ea06f7077aeaa0662b52b1ccedad5. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFZ22281134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760785b272b7de4e6b8e7e8dda66a87f6277c45d1b11e1462009f65cf9db5653. Chain 2 (Bitcoin): anchored in block 958487 (2026-07-18T03:43:59Z), 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/QZFZ22281136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf811a45352e44894ec7191938483ea013bc7ba370db880d30abd5ee204780d2. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZNJX2590979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5090a542e5d1b340de4dfd52a20ed4bf2d29fc8c72b018e1e43e4ae6322a161a. 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/QZNJX2590981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee413ad51bbae4deb21e5566d91422b79f0eb2e63a171e01c5e170e50d10524b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZNJX2590985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc80788fa69d3fd982eec7d6d06ea1d3065bb1835e62792a2b669f5238094f8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJX2590986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e42c647f3f49b81aa5048b2cf7de45f36430812d5f01685a8b6423388b9489. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNJX2590987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ea9c1a54ca547c71e72b661e1d16cc299e72f043ba3c8b33840f5591173a2b. 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/QZGLM2341980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5890ad37affb308e286ee2691de9ad8325873eb475cd836e181214ad81728d48. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/QZK6L2465287.
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 0xedeb599e366bebbb7a6ac543655ee0f77c1f172e978b163370dc3d6cc954309f. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZDA62015798.