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 0x381788acbe341883fcd1871d016b76052e81308238c6c5cce96720166c661612. 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/d46334f1-a478-4c7e-8bf5-35906c1fced8.json and https://artists.proofprofile.net/proofs/artist/d46334f1-a478-4c7e-8bf5-35906c1fced8.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 0x79efa52ae3d8116ba3eb2ef5ff8e9e8c2bfc1b0fdbf2e25d13e7349e520de8b4. 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/GBEKZ0300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc97e8dab793e85391b8732f08220b57121f8eb27f59235827ea8de8a7d867d0f. 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/GBEKZ0300043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa063014d480237a42523deec83f209679b752acdccadb3dcb2595433ec82e50a. 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/GBEKZ0300035.
My hen wlad fy nhadau (Welsh National Anthem)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80aad15877a67f1f6fc72c48e7639c188fdae27f6acb2ba04e745b03f6ad0bf. 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/GBEKZ0500113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd7c07b968e9edabeb54233252a642696686987e456479f37191e5e11520f68. 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/GBEKZ0400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa063014d480237a42523deec83f209679b752acdccadb3dcb2595433ec82e50a. 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/GBEKZ0300035.
Land Of My Fathers: Timeless Welsh Classics From The Land Of Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61212603d86fbaf54144a961eb4d9683c42f4ad845421819e4f51bb3350afb5d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBEKZ0500116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b40e29099011e5d1c538ecd33326cee3ae1ff3a1fa8985a397a49911ceab58b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:47:17Z), 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/GBEKZ0300023.
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 0x71760edf4f95c5ac6bd1307ca8f7322be11106d1341361e58b9a2129b2c5d1c5. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBEKZ0300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbb46b00fa9db6491f21c6aaec64899a64c4e9094d6a4451182a589a3b1c50f. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/GBEKZ0300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c45a5f339adc8697c245150737dbc682064cf9bf168aa4c0e2b7287b6ca44f1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBEKZ0300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf664f55d4247d79b1ca4fb877cf17cdbbbe5a5cf884f8454920d6e211c831a5f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/GBEKZ0300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a64e1e2a854f88550297d9b207c68a45ade0b1cdb4ac0034b62cf7e3857aae0. 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/GBEKZ0300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce43e8709037472e76c2a6a61eeb64567c41fc18c0be8164a02a12c1dc581416. 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/GBEKZ0400447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08aab5bcb0dfdab4a731686d6dae19fd1f1dab604711a0ab4b50be0019d55a14. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBEKZ0500114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f3bb301603ce407d0a3fe708f25719d438eb1b0c2711953ac9ab60ae03507d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBEKZ0500121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cd41655a5fdb416fe9712d4ce08fd7491a102b75df3d949ba8d343dd7ee814. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBEKZ0400445.