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 0x7f5f83a8b28a7cf56e9025ebf6421c5c20ba9b21e84ae3676e683c060cdd437d. 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/35928d69-a287-4686-a0e9-265b70f14638.json and https://artists.proofprofile.net/proofs/artist/35928d69-a287-4686-a0e9-265b70f14638.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 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 0x6bcbd8d1f74bdd5dc22e37a7c2d9307966e3e4ab1c65cdf5938d351d7fa7e208. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZES91883149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c164548825596c4d09126c797a11b2e7efb4b7d4c2e671ee8fe645eff810747. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZ85M1986985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503fec7573f3b01f8246f1e1b89ebe0ab30e34b7d764dbede21a7513f0c72758. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM42K1997004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7711ae301347f67e7627bbcf9e29e0749a8fc41c626dde73202ada849b4db8cc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZKDK2077264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f700d0560da000f6b68f05c6327728b5ae45f52306f7612ed932a62fcce0849. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZMHP2086882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e48cb275ba1b01bbaf72f65338fc10643d506b46276956a88fe4984f59e852b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZKDK2106564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f9fdfb31946fb64f8d96cf3a84aa5e3fff42863506d5c0d2b45070b373634d. 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/QZMHN2082582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ed44f2aea4307f3103f37bcd4ac629ea8361b34de6a60890de4aee7d1309de. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZS652153399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6103aea804cfe8632798c0caef548f120d333308620c3f34b6b6e30257f31f6. 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/USLD91735700.
Seeing Red (with Dusty Locane & Rah Swish)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec78a5100277e3124687f284fc29598b25fae8d594e6c18047592272c35a7f20. 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/USUM72218620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0b96e78ba4487df357b8f0363c93bc7b1ca8180215f5fa9dd3e8be0b26e258. 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/QZTLA2348169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0031bc9b74812f41ca8f616216313f54c3decfde142c7b428bad56bb718a49. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZQAY2356837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48e1af786c56f6e6a18c5385fd2b545d58993641220e24c827293046215b876. 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/QZS7J2340162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bed6f370828ecc716ea5e0337c155d601d088077ee82092b1ae64f3b7c0cee8. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZS7J2390510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a293ceedb764a20571371de4acf663e561fbd1fae0cab60a82124d53287e0d. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZS7J2386320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0031bc9b74812f41ca8f616216313f54c3decfde142c7b428bad56bb718a49. 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/QZQAY2356837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0dc568f78b67aa697584eef85a094ea020b6a63827eb6cb94fdbc25c969bb6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZS7J2343625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97870458fceb8c19873fbdd716448ab429419d9dcbfdf9c23c47942d06cce083. 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/QZQAY2499286.
how can you be sad on a boat? (Alternate Versions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4087db1d0387dd4396dcd5a7b8fa2db0d7496c2765cfd52798be55ac2410e3be. 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/QZK6G2323339.