Brass Against is an American cover band that creates brass-inflected cover versions of rock songs. The collective chooses politically charged songs and other socially conscious music in order to raise
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 0xad270e9d02026d33e9a5001d59730ec6129ed62fe5b5a9c09ea8f00440c1cd51. 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/baca01c0-6fff-44a6-8d6d-802b44aad89c.json and https://artists.proofprofile.net/proofs/artist/baca01c0-6fff-44a6-8d6d-802b44aad89c.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 0x7772659f66fffc4049e1ef4a294042a6747f256fd18b7976d923adfa9bf61396. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCADG1773829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e5fb3241372bde7e34b400a3f6876b063273f24794f92ccbaecce5cd178f84. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/TCADJ1763431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3af17ca49a22a62ee006d49c13b26c7c8490371c2486038217a7dc1a99e876c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCADM1839375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab994b4ed4228e8bf6abb1d6a6d5a1f558894c5f57558804c5acfd0a53d1e45. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:06:03Z), 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/TCADO1892453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54458a83d0eb1c979780be8868ccf58b05daa25b6ba4b91f1e0284176355b031. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCADQ1885619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f98b1b65eeeed4a5ca27092437b777df269700fd73ae0d31abc2dc21d42d3a9. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:31:41Z), 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/TCADI1790630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d36953d4e2a9a67720a4f6fca3c2ef1ed988cc6131e6338167b8288cdb00eb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCADK1780910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03812aa81b3d004bbf6033f317e192d1a93ca2a71a499c9aed219067bf156c15. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:45:55Z), 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/QZHZ41937347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb99fbf5f73793d6cbf144fe90b26637ee6b6416b4f1aee6de7b1f5e3488a62c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHZ41937353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd371ad4b478c27eab42964e363f91e1b482d7a601fbad7a0f93dbd5082a788. 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/QZHZ41937354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b14d92071b0ed6d071b668b4d0571f730dd6a88607672a51718aba711b80ef. 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/QZHZ41998506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dd4e26d6a4d5a5cf6d1df4797060c1319a5bd23fb4cf4dc330c9c2328b9e8d. 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/QM24S1922496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64efe7c43ede60456b21eb29ce6483bf19c3a9a79612cf0dbce088b298e64b8b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US7VG2058322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5494979432407fd2e647d5d995ea2781b88533c59c8501288c89eef23c78a3. 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/QZKY22000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce0b459606a92acb971f64e09dda81cd6b46a982ae69ec8e4a68a4c080b01c1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZKY22100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18aa5673997aa806226b34ac0e4b43a746701ebd529d9719e6e1ea3d911b088b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZKY22100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb10b8d68915975517c8522eaf63757945b218e6d9da1fe50954b58aa0ab419. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZKY22100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0efe905f44194e74137efb6c5dfd9526415f29e4082a05b3d084726bd6d5866. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:08:30Z), 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/QZKY22100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af9449c32e62343baf74a154962d99e37c1d2096dfc194eaacac4b443d25613. 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/QZKY22100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c8944055187e46c9b920218126f99fc695c1325ce760b145b945cd453e7300. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:45:40Z), 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/QZKY22000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18aa5673997aa806226b34ac0e4b43a746701ebd529d9719e6e1ea3d911b088b. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZKY22100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e497923e3528f4b6b9bfbae85c2750ec0edf578e0bdaa8187478a04892ce8e. 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/QZKY22000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8370b6a0d430e5e038d8afe88e6a56d3fa0a0b3ca6ef2e3e34317763e8e4bbc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZKY22200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5739cc4384d73f679561dc334e99ad5f561174de479280c56ac11fd6142b51. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZKY22200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6d1dd452d40ca3e5d0fd7796bb5ab9042472337326e468326f95600d8c3833. 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/QZKY22300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7981295a301eb0bc5dde1781472e4dbe7ace833e48c91bdae05c428eaf7a3a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZKY22300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e902b803d21c487388c87edc3fbe152ca7de27f6e93c99f79b5834f267b71d2. 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/QZKY22300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e338ea232d247b75014b90c664931d20a7952101707521d690f0079770e4d12. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/QZKY22200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6d1dd452d40ca3e5d0fd7796bb5ab9042472337326e468326f95600d8c3833. 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/QZKY22300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c9a826bfa8c5d0af6c719cf30833573fd56a6ced61862a6fff9948d354f268. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZKY22300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c55d8c32aae72d267654c56c6978ce3d6e75fc20e66a20eb1aaf33f77079435. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:07Z), 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/QZKY22300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff944f73088fdf3c509751b94bf5d6cd22c320a3ac5d582f945f631443c61af1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:17:13Z), 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/QZKY22300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17adb3c0eb0375e1c7b35d1f1cd1bec08a13ebfa54e3926203d0f160d86f0c6. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZKY22300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abe0d5eb7764555e486a9fc46e994ebb591f6d41bd52b41d94de72cae2e354d. 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/QZKY22400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6cfa07b1d2c47b9e0537f618fe94d4af27e14ebf294e9d6f16b72416bdd2c3. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZKY22400002.