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 0xfcc65ec895a82c7f34b534710560dd3682988c5ac62cb2240c6d1a44698db489. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c344d169-f66f-4524-b892-e125d4dd23c7.json and https://artists.proofprofile.net/proofs/artist/c344d169-f66f-4524-b892-e125d4dd23c7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Your Time’s Comin’ (feat. Willie Nelson)
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 0x2f9bb8285063ed9131fa014e04cdc91ded23e016b1fccafa89e90dc2ca1854f4. 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/USDY41601446.
Who'll Turn out the Lights in Your World Tonight
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b19ba85ab44f80e54629cbaccff8c6bb88510bb64506819c9ab66a7cb3e14e7. 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/USDY41601447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa2b20317535cb6e6600c5b088f7b5f8a1a0ca4e97862739494c8645ac01378. 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/USDY41601449.
It Just Doesn't Seem to Matter (feat. Jeannie Seely)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c24670a30da9b51af51b1ec9aed46df286b87ec06163c6d00bebd3d070c1ee. 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/USDY41601454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c42a64c48466f00fb8f1a45ea09e7b3537cd6f8c511708b2cb9151b741aead. 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/USDY41601455.
Eleven Roses (feat. Mona McCall & Darrell McCall)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2dc0a8ab80ed5ee43dceb888f1746016e2ffe5bd3f87b7956b7ecf36488b0c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USDY41601456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a125dd7d48c114c33cd49c6dddea9708bfbb2d07ae994621ff4eaf4d85a0de. 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/USDY41601457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe6f0aea93b75a9ac65ccde0e153c953d6d8bb67adaea2f8e88b583008c2ef0. 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/USY280783829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce57450603b202071c511bb452af0c3ef409cfd0b68e67d1d6f81cffea7c11f9. 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/USY280783830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f382d1767f8d7e9899fdd45ebbf14c8b62f980cb53715c2d926c132e3eeab33. 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/USY280783832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5327f6d6f6c152be3d08a8e697321e506027de2d2c0a98003469ccad2f8942c3. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USY280783833.
The Key's in the Mailbox: A Tribute to Tony Booth