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 0x522d5e47fc34792f967c4a2714ce5c7139e47051c5d017821578aecbbb1ec153. 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/91a2530c-f269-4849-913d-957fd9de2d48.json and https://artists.proofprofile.net/proofs/artist/91a2530c-f269-4849-913d-957fd9de2d48.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 0x25e22cadeef5adbd17bdf60fa4f208a9428445035ca67f6fbfeabd106b01082a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBCFB2200296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646de88b8b8a8e8d3d83d4ad6d3a6dc2153a8c47462c08d942eb869c9654f7b0. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBCFB2200298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf967c9c12b3944e66ebd5a59427649646744d54b98577e8110382c758bcec9. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GBCFB2200299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc384c3698ef1a66828e522fdf6ccd3e9c2cdcdc9c2bdd656b896e83f7d91c3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBCFB2401039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccdca7f0abc23e13ba1b84905dc891b9d323edba1a328115f87b0b335ee356f. 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/GBCFB2401212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d380fe5784ba577975a6a78c9166ab5742359854035b3e51e07276319421351. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBCFB2401208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d13a40992769908161d634eec7019d99835044726e44419010133579f384f31. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBCFB2401210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5cf051dee735da04f58e8d4eea8be7592a736ae7c734cc51d4cded8bcaa834. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GBCFB2401211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eec4d662d3dd29f42b2d71912e3adbb8767ed9c82187d30c00c4bc7da8821d. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/GBCFB2401213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccdca7f0abc23e13ba1b84905dc891b9d323edba1a328115f87b0b335ee356f. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/GBCFB2401212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1832d1ed5fce2b801941220c0969684e6d32e4a4920346823a8d8e735110e5. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/GBCFB2401207.
Monday - Metronomy x Brian Nasty x Folly Group
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa418d773c3218177b8d43e456f58bb061c88eaed48e86763f7395c7d115bee2d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBMVH2100790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa418d773c3218177b8d43e456f58bb061c88eaed48e86763f7395c7d115bee2d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBMVH2100790.
Scenic Route - The Road Less Travelled Vol. 1 (Compilation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb347c2bf73d9883c0c25205151475c0f3cb7b72a04f10ab5abdce47df598185c. 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/QM4TW2265367.