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 0x5f00ea4e2487602eee37242e2ca0cfa2c8fc26ed113a14f10ccb8f3d08eda36e. 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/ae2576f6-0db4-47b0-b92a-877af703c309.json and https://artists.proofprofile.net/proofs/artist/ae2576f6-0db4-47b0-b92a-877af703c309.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 0x9cfd73173c05c91674be439af71ab7f8294c12b80601987679a4913f632aaa50. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CASD11000092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fa9a6eabf4040bd1bd54c7fcf248b36c2b058db8ab87885ff608412ce49f3e. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/CASD11000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02002a1fa2eedbdfed030977c117e0c32775301be161e7d81bd7ca948c92329. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/CASD11000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813513057569544ddc3d320423cff9446127d74558aab2f6fe0cf9845014a9d5. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/CASD11000097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f7ad4046b27254287a8581579735b6931235135ebc5b6d2a5d6593d6755767. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/CASD11000098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c2bb6ded294c58ea6dd6f5af6f4dc199c2fb08a4579260c4ec5488bc97b35b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CASD11000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a6a2a967ad54c894318e98bba5f97e3b00dc3720d806092eb4945001d2a733. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CASD11000102.
Nobody Does It Better (from "The Spy Who Loved Me")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18bb2b489096a26cc09dfe7d64728a45adab51ba7e12eaaae59396abb4423493. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/CASD10606436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cfa68c578dd7ce54209a6ae27a1d442d40b3e4b477ea14b096b5df11519ea2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CASD10606437.
How Do I Live Without You? (from "Con Air")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2a5f449ea5c7592a05e11a2265224cd101d2e7f1222d4219e3e41bef555bde. 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/CASD10606438.
I Will Always Love You (from "The Bodyguard")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3631784274a33442a41b7f399c97539914aa824765536b5804e4733379f49f64. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/CASD10606439.
Beauty and the Beast (from "Beauty and the Beast")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfccd5f973cd8865330c8b6e4c246a2d8cb2b3f925d6783e8cce62537d6e57e2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/CASD10606440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7361e8f5c448330a5cd0b6c5a04e206aba14f78ce9c1eb1821c93ec9b06499d6. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CASD10606441.
Do You Know Where You're Going To? (from "Mahogany")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf630ca6f424f53a5331b22f3422a2fadad865cd72a961c52b4a3944d8993a9b6. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/CASD10606443.
You Light up My Life (from "You Light up My Life")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1537bdae258e254d4eb45d790b9c3756a05f898902271b5339f4a8a2a436e62. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/CASD10606445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a6272e2b833d2cc9e0013515f596961cc537bad6ac74229fcdcc2dcac37ba7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CASD10600383.
An Evening with Friends: Smooth Spanish Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8069c944cc9124111b0ddfc9fc71fbaea58ec15597fb78449374be54e13999. 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/CASD10500605.