Crown City Rockers is a five-member hip hop band from Oakland, California, by way of Boston and Pasadena, California. Formerly known as Mission, the name under which they released their first album,"B
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 0x24b4c002e6449023da6d8e53fc031a2607c0df08bc89df619c086d40925ab1a3. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa01abef-ee93-435e-940b-777eccb883e6.json and https://artists.proofprofile.net/proofs/artist/aa01abef-ee93-435e-940b-777eccb883e6.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 0xb5643ea531a8e92f48e4c44658d3231fb8ce194a4afed069dc7374dbb944570e. 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/US2950410005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6069d0c1f309461e5cdba4845039af34fbc1dcfd6f306f480cb414ccf49a95a4. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:06Z), 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/US2950510001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c37be4afb05a92890817548613bf92c557243b296b3f564126b52ca62af3670. 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/USV291407611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35e65fc696d9e27e995b3349415bba21b70aedd4e8118bfad792e68d30b25e3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USV291407612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68b7d603de9e856a76dc3892e73d0a5a095670f483f42389b6b8983c786025a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USV291407613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087b9a7e7ad515c1f87f4f5c515ef3473f43e3b20f750ce7767daf5fb18f7f63. 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/USV291407614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb926ce25bff2ff4964ab40f0d6213f75f7201d995bd6c739544cbf2608ce3a. 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/USV291407615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05100e9f41f74b378733d7bffdd83ce34a9f731d8e466daae0b325cdce6b36b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USV291407616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c606243f09a32b0767fe788b858100b652e41f40153d5afa2b06ffeb0cb0cd. 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/USV291407617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3421c3c0643608f0fe99b88fcd164e0246dc4be2e490d4c1048dfc1ba454d63c. 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/USV291407623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f267f239651d93a387329a075845c3d91d13c4ebb2bff61450c1918763b94d. 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/USV291407627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f62bc04faac7a1622730d555342ee089e2f0464bac411d1a535ffac22dd2a2e. 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/USV291407628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fa6472a80e7d10fc6f997ba19ca8bceed47eff5dd2b40d631fb88097661949. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USV291407629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83cfb766f6484e53749f5c3168803fdbf6b4fb0b2fe635d425e7c82ef8f9b0b3. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USV291407618.
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 0x09c4e2a4959fcc20f2e567d557a6df8cffe2ef301b044f74bac3777110deea59. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USV291407619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50826370410fce504e1e159d0819d4d1aeb59b4e9910fd570ebbeb5ca26c8a1f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USV291407620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd0ce5a34419039f66ea904d24dab9e00a9f196d1ab039ffc0614541857aa34. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USV291407621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d6f2b9a021d0ee2b415112c1584fb42738c8296b0a844ad763e079bbfadd89. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USV291407622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f13b5fcd0ca8f43f87f579c3bfe58c15f405f427e53501779647d8a746f526. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USV291407624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caf5b3ea005f96b5386dca8dfdc864bf8a6cf411bae76e79210def774d798ef. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USV291407625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5778337dfcb1f4a2662852a5831cff62c5d37e068eb9f7c936d23f145119fec1. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/USV291407626.
The Day After Forever (Instrumental Version)
Crown City Rockers - Unreleased Joints, Demos & B-Sides
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a56b511def09bc0d1e90f229b06187ac064508be2e4e7ba0acd0d0259d732c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JPD731101373.