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 0x2bb5385c7507b5e1516d69bb8eff09dc02047f3a44bd2fd2655417fead940575. 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/97391a58-fd2b-49bf-8be6-a698445f2e60.json and https://artists.proofprofile.net/proofs/artist/97391a58-fd2b-49bf-8be6-a698445f2e60.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 0x149ca318c91cab1393aea9e3153841875ed84340a3cb92e38ee953575817b323. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBLFP2240555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbd69cfa37ae76603ecf8987c97646212e07e0a291ef20c4af9b5355114c19a. 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/QZHNA1965392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee322a8e2e404c5d9e53c585d671025eb02f71aea5a2f4d8bdfb9eacefd785bb. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZHNA1965393.
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
42 or 43 Beats That Weren't Good Enough to Go on Our Other Albums
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ad52a0a72fecc44bb442586c1597864a9011a56992102baa537bfb0444af76. 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/QZHN61913618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e59db6a7be27b13a21aa416a773a7a731b0af3e9e7bf07bb80871e3f88bec2c. 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/QZHN61913621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6239e4084470d78b9df4900fe9a7a1710b6a1e42429985bdaf244c85d740bf. 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/QZHN61913617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d2415cc073475783e2544425535858192cfe7b33699e2e1acb231209d436bb. 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/QZES91802749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39243b45aa86d0800a414e82f23f2c034ebd49c82a065d90a22364d73e6c9d5c. 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/QZES91802752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50ee8388e01ce726e7392d59c540739d8b8972870bb67ee0a2723875e847e89. 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/QZDA71819109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fa7504a2daa98d9c0f15df4f235ce093e7bfb7ecd1e0deb258edb96fbad716. 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/QZDA71819119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927cd64c601fe4cc759cd6f815bec3e91b22f03b34a02c4727158ed88f0f7154. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZDA71819112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e60a0ba089f9e179b28e8021aaeff367b04cca1f3046b1d5bc61f590af6eb2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZDA71819113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd914033c845de2b4b01911df5eeb90d6bb1ff2e9754532e23cab3bf3353c2087. 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/QZDA81807981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b67518b63c5e36f2a60b620d3f7cb31e96c2633d16e0394904fd3f7c5c24fc9. 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/QZDA81807982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe34ceb5298a91fbba81e0b775a7fe48ba5d22737ecf5771da67e13e3914c42. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZDA81807983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34919760188e6b385ae465254fe7637772e953a1362f8e4f582e994a34f73a20. 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/QZDA81807986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bce63db65081b0056046b62d90b43e889e8ef2a57327542603f2d1bdd1eec3. 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/QZDA71843490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc70c4d292266f0990ecfa718a2a3303981b0ce979192e4c978332d66b3cfd4. 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/QZDA71843493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5b6615b1ed87f6b912e149a5a7432979cfd6da9285a60d68d9b6e78aa5a260. 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/QZDA71843496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16967eca5013828eac7194fab8cc4a11b047984b9ccb08e8502b389bd690b1df. 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/QZDA71843491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f5bd38ca77453948a03eb38d6d8d6e996b0587a8b86c4707f26bfc9d22919d. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZDA71843492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44215523f2d94234f11b0298d9a703370a6e7f20f64d0c6c7ad76076b49d0ac. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZDA71843494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5226eac85dcd46464d94c6ec2f3808072f4f42459753f4230e809a4d940e8ad5. 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/QZDA71843495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc2031781421b78abec61417bb2671b17e5d83fd3bf35266f32397a87028518. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QZDA71843497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6680e1a857e2d476290dbd4c58f56a8d366acfec3456f9cc93fd543d3a4b340. 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/GBMA22363633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a12ea9e867c56cf2fadabcc9970c0101c9bcdc379c1d488411e32292f9a928. 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/QZES51834145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe50060ec74b1584301bf2834f2d8387b631cb1373d2579de6fb996fcc6c505. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZDA81869512.