The Chamanas are a Mexican indie pop band. The band was started by Manuel Calderon and Hector "Mije" Carreon. Paulina Reza, and Alejandro Bustillos later joined the band. The group's music has Centra
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 0x97235abd14632c8909c47720f8cc8f032a10616696754fa802a46cc9d91d4334. 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/187356a1-a7ce-47e4-9126-708cd58c34ec.json and https://artists.proofprofile.net/proofs/artist/187356a1-a7ce-47e4-9126-708cd58c34ec.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 0xe64e234f3e66f00912a31328169e4bc194215396cf71765d5d18ac68e1b676db. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/UST8K1424517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea8f43ff12635536d050671af1b1b512782261e1e58ea0e41f9bc4925852dce. 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/QM46Z1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8df3ea2a37b9d29c98a1b6b62bc43467a6fa9f0212b3485b142f75cc6e568d. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QM46Z1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68279c10e22b4f45a69c1d8f2e2531eefacd1bc283eb2a569adac74bf6d4043. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM46Z1500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30c3dff87f872d950d351bc46b52f38eca2f648a4b3cbd02500f46288044318. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QM46Z1500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b0f8c8c0d92c8d95c6393569858b9efd1e5595eb5e83f471967087537732f2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/MX3741501061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7d3de4c806eb8390cbcdd455d749edf6f5aa8f5757edafe3321ee7ec87323b. 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/MX3741600093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2307f498b79032b40255de41a0b72057d3a72ba9cef8f62c589b01298eff35b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:10:14Z), 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/QM46Z1700103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8f8e2f9003e777c5a9507ef48bb177a55a2dadbea5fccf58ac79ff95072c8c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T09:45:18Z), 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/QM46Z1700107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1122a60bf05b0ac406f77ae05eb069ec2c03fa8fb53a482d5e2d2dd93921c9cb. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QM46Z1700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e545b52c11a5a5a8c3d263a0bf4c59793210e37403a27472c7d9c1d2300d43. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:01:07Z), 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/QM46Z1700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0055c0a197e2568657b2554508802fda3b4cdd6d8341b8466c542a309b73ea. 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/QM8E51400228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5e30d4fe7aebb935c3a6ddd91022420ec1ea9659f096c4cf3ff07a7057beb5. 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/QM8E51400229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c43b8ccc1e8eab707441fdfac76a1e0d734144214b1aae80318f0c4858c9cd. 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/QM8E51400231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9279d9ffb955046b059e9772e0b8b1519c9d14eff0232968bbcc0abaa2035f08. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:44:30Z), 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/QM8E51400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5bbd2c2cccfde634bebebe3273526924389faa4afc67e9e15eb0409a3ad8df. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM8E51400234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b91eb718155de076dd357c96105bbb19da0bca185f728cfdafccbd371a5efa. 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/GBCFB1700215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b91eb718155de076dd357c96105bbb19da0bca185f728cfdafccbd371a5efa. 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/GBCFB1700215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a00ab9ea253aa07d0e2fcdd267da08da42408d66dbec6365eabf4f99119aa2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CLKT21700369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a00ab9ea253aa07d0e2fcdd267da08da42408d66dbec6365eabf4f99119aa2. 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/CLKT21700369.