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 0x6174abe182f1485495516885c95c045c891ba6f9a56a3a6733382bc9ad8299b5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e02ac3f-2a12-4481-b86f-403bf9df97e6.json and https://artists.proofprofile.net/proofs/artist/5e02ac3f-2a12-4481-b86f-403bf9df97e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rain, Thunder And Lightning Storm Sounds
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 0xafe5adabfdbe15439d4f87ad8c17c04300fa2b86868a483547d36480dcfaaf20. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZAKB2003557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe789621c671f94d53e5428e6116ca24c0e9f737ec044646588edfe440efbe201. 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/QZAKB2003558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eda7624efee395f17cb9b3d98fcee13ac04c3e16fdfbf82bae39b71f42c76d2. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZAKB2003559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c530cf7b88bcac98f1b565f1c768a7e9d3287971a52a4279f0a64ad1a1a963. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZAKB2003560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216162b6cd56be2c806c12974006fbacbe3c0d3f24abca679a9d9d9f76dd5909. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZAKB2003563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e062f5c6c209057b3db4231b42d95dd75c146ede1ef6e869fa0f3f46a6b87f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZAKB2003564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a5a484106b34efd8656863cfaee4fe9b94432a11f1207f6ff25f924f1f2383. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZAKB2003567.
Pouring Rain, Striking Thunder - Loopable
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe300adce3b1e8f1d0a73510d48a713cbd554391a72248a2cc17eee76168d1eae. 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/QZAKB2003568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f0bc95fc1af49b16812fcbb985f43786610c1ddb75a26058d6daddd1119d7f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/QZAKB2003570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca96b2c9ef4f057dea4f0d7213bae513d458b28c704a7a77c00da2b766c637a. 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/QZAKB2003571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258af886614a3bff91b9aef1d1cb3289c311d31b3520c749889c1d4e6ba8cc7d. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZAKB2003575.