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 0xc9940fee8af62ccf704e523c09919f053ec018b59b3cf585205e962d99fcad56. 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/9e33c2f6-3ffc-4806-8e45-0a826aff19cd.json and https://artists.proofprofile.net/proofs/artist/9e33c2f6-3ffc-4806-8e45-0a826aff19cd.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 0x64a409ae4755ece0936f81c90f5563a966bef82a69d272ada0f978e9f3ab96fd. 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/USA560771235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0433273ac776e3cbe2d86c3949932d374ede4c17ba0f273cc8c845cc1be22534. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USA560771238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb81cc8f95a28f8815a6d78e1fcc145a37d6cb7215bec7a22610fb0628494b29. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/US78L0810030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535933251bb8306dc18072161a7a4baadc0157620fa7c1a2b49bcc750e1707d0. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US78L0810032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dd6b250eeabf49e3a267a029493b78c093d3fca14fe89dc1ffa7ad62274dd5. 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/US78L0910063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd06e92833de0416b87eae42af716d5ea3a36c6e11b213d39e3af30ab774168c. 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/US78L0910064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff50f4c8e9cad02a87d98da6e6fe52b7ffc7e7df4362ba63bf035e1469bbd136. 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/US78L0910065.
Wild Honey Never Stolen / Borne Away On A Black Barge
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb989cf10c82d0fb04690744c474f7403c2c1dfc436b7b483d772198697af7ff0. 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/US78L1061202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a432967f16f20a930804b865704144f51a936d32ef32e7c80b4d0715974568. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/US78L1061211.
If You've Gotta Go, Go Now - Bonus Track
Subterranean Homesick Blues: A Tribute to Bob Dylan's 'Bringing It All Back Home'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3482cf2d4e16f371c701b51795f572ffd6ed15a55db491fdae84b67c08bbb9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USVZZ1010012.