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 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 0x60b1cac5714eaa74792af9b197251ab2beeb849c230251e9654aa4c1c1277385. Chain 2 (Bitcoin): anchored in block 953841 (2026-06-15T22:20:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0011abc8-8851-4524-b8bc-88bd08a8efb1.json and https://artists.proofprofile.net/proofs/artist/0011abc8-8851-4524-b8bc-88bd08a8efb1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
BOCA Vol. 1&2: Best Of College A Cappella
Wasting Our Parents' Money: The Best Of College A Cappella Humor
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 0x8f3d4660264b93f4af1700599479bbef517b55fd4ea5457d15ac52a77db31d36. 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/USE830921092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a37d2d64f800b40fc76edfa49d598e33ec033c36e9c570b70d5658cbeddd1e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USE830921099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eeeb14296520ce39f788de09b57909145f28f00a8ab27bd25a9d7fa41e950d0. 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/USE830921100.
BOHSA 2001: Best Of High School A Cappella
BOHSA 2002: Best Of High School A Cappella
BOHSA 2003: Best Of High School A Cappella
BOHSA 2004: Best Of High School A Cappella
BOHSA 2005: Best Of High School A Cappella
BOHSA 2006: Best Of High School A Cappella
BOHSA 2007: Best Of High School A Cappella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c610981c026910fa4cac62a8ed7716380b1f32aafce28d5ea0a97d8e1bfff5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USE830921165.
BOHSA 2008: Best Of High School A Cappella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa204db2f3c5023c82ae5148a198b8b30d2a633d00ece300aabefea80475c14c3. 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/USE830921608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067e82e2cfda10c39f6a413fb4a381c2796104f0a88135411bd9788b01625e73. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USE830914108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b3b1ccdb3b20fb4f6ffb49a64abc513bbfd19da8fe342b4faa9fbb058f1499. 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/USE830914111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030da476bc732574bf1c990380636e09c4e62c80f449294376da1461faaf93bc. 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/USE830914114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b70c0088e6e3d44fdabec68c8ec13a2d293e5b8693d721e4ff243582d56b20. 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/USE830914116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e67e19342d635961cd18c001230e13bd82dedebe72e350d4e8b4eea89d07dbf. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USE830914118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4fd51c73d0e25ae5fc84326831140ea8786622f9059b9ef68ed9096450cb43. 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/USE830914120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3327b6b1f540e557cc98e611502d176327e75c85a908a0aab351d0bd34251420. 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/USE830914124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837697d330558a88ad1cda8935bdfb66d4c887caa662d29ee58f083e36b18bce. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USE830919891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4dfc1f29c47c88ce2ea39b02a5ad48ecda7707d34dd1edfc74005b39e747c9. 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/USE830919894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef6d490aa3c60de3f97c4613690eef59fd3310712e78c8c7b865fea3ca44e68. 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/USE830919895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d21d6aa99adb81ea17d569354d4ff54daf0a9bf1df1fcf1c791a8bcde69b38. 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/USE830919896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bdaea7c97c2c85c2da547cefe695125e6159f4740e9a4460edb2d1c086db9da. 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/USE830919897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc6c19e364dbc5a2069f5ea2142b836d879d275c1cc7eb7cf8581a6b3665cab. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USE830919899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1ea5e0f8b87bc3b1b3c84ac0e83d26771c86f7350ca909cf6f4e303d24be43. 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/USE830919900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c4e9c806f1ff6e1d02ab076dc9ae230273b8c08913a7172977294af7c9d3ab. 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/USE830919901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30eb7beea23d79ac43582fbc2fd0510787a0836ccaa21e6305fccc642a6c26da. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USE830919903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ad93d28a66972867fb78b28b5c5de95b7242ffad0277e8cbf315c953e11b17. 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/USE830919906.
BOCA 1997-1998: Best Of College A Cappella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e01364695e90975b7ede72ae53e5c651b48bd8291f4dd91cd637d91c268d224. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USE830921251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57311895261ccb5783449087d333d1bf368a71f593f3396b3e1b80277e62a9eb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USE830921271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9843ae0dc7a55c339d5ff8016900018b76636face8b7ee1cf3b41197069640b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USE830921274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e3beb6f09f23cfdac2329e008699ee8738cffeb0609106c83207c6bd0f6cdb. 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/USE830921258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bfad3f05aaad2a5c140198e2ad2d7a4d972c3d5f4643e3ca3484d593f3ec55. 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/USE830921502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccf8948bdd3561a9e20eb1b25fbf7d6eca6a093357328f2e7a77ed4138c5faf. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USE830921503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03a4e1b4752a5b22868868667a0b810455e23b9f964e872aabc007cb0490c66. 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/USE830921505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7630d96f74036adb24d1d7cb59e0fd601e579152d403a2f3be86e76830bb7f02. 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/USE830921506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812bb93a2eabfd78fa54ffd85105e5ae0a7e57e46b32d650a519cf25efe2e8bf. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/USE830921507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303bb16dc3b3c9eda261cbd8922921bbce72e2f45539d3e36b264bba3b0255c3. 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/USE830921509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84afc3ff3ed2fff2de292a4045bcf09110a98b4716d87549d1c3e17a062d2273. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USE830921513.
Teenage Mutant Ninja Turtle (Bonus Track)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34275a4c9b7a7391cf857cedd606d07a7ad43373ca03bb3de0ef9e844b65b5a. 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/USE830921521.