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 0x0a156a98c5fab4f35c8c01ac8c59b0c41196050fc5b59592518c0d951943ea37. 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/baa197b9-c0a5-4244-b84a-d8d5a8edac21.json and https://artists.proofprofile.net/proofs/artist/baa197b9-c0a5-4244-b84a-d8d5a8edac21.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 0x262c9a935a5d82ff2584c5848d3a8bbbd39f618c9e4dfbb92528001a2ac68148. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ93L1959098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5954d58d6182e7c35a6132965623d882d0a9ca1a913eb54a67832a3a0f6590e8. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:27Z), 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/TCAEF1936978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8993bfd9fe95f0fea4c438c922fc063b27b39281eca75e8d95900db1957d77. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAEL1910354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f98b469324932f075338937bd2761844267e3234c8b58b4d9283bb3772e514a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAEL1960886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b469ded009723ae57e09e7b3d0b2e879d9f13f1f45a36f80fa1595af2ea786. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:54:13Z), 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/QZGLS2095746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaed6dad4971e80013630ba4f8c84e617a8937894630e05df6c4df3e926c8b87. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZMZ92027265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9601cb3482a0f94a8f177f8510d38decedf153c8c7ca8566b1afb29c2843e22f. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZHZ51963352.
United States of Chemicals (OurVinyl Sessions)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6135f25e67ba5b9a6a209dcc3eac6a0e3c1b23bd047ad257ab0a77c9cbe2e269. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZGLS2170150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d29f7fc09ee9947d4ad04f9d705b9895275f552a4d8bd6536d70fbca16ce64. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USC4R2333405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d018278b7f4a55ee32895c3868846aae512c914759c028fe5945c0a799f1a21. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/USC4R2333404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82b3b41d02b55814858c08ae6b686d75ecddf9a740c8b0b241649adba75e97d. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZMZ92027267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea59230694dd879c8dc8663b0979d6bb4d5e705c10f208fbe2c7c115744969fc. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHZ62016855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262c9a935a5d82ff2584c5848d3a8bbbd39f618c9e4dfbb92528001a2ac68148. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZ93L1959098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8993bfd9fe95f0fea4c438c922fc063b27b39281eca75e8d95900db1957d77. 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/TCAEL1910354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7923b5e279e777a33765de973347814594c67c6c5800f21909a375f3d73e04a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/USC4R2447316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8779c51aba2dccc098b8760fc83fc05ddfacf5f15c301342aa6890e17a2c09. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USC4R2449050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fc6eb443dd38f6027ae121416047b66bae2754024a857f77e0930c2be1c6b0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USC4R2449411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7923b5e279e777a33765de973347814594c67c6c5800f21909a375f3d73e04a. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/USC4R2447316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fc6eb443dd38f6027ae121416047b66bae2754024a857f77e0930c2be1c6b0. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:55:27Z), 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/USC4R2449411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8779c51aba2dccc098b8760fc83fc05ddfacf5f15c301342aa6890e17a2c09. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USC4R2449050.