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 0xf9068edbf5153b00d4974cd2760a5f875e964246428fe72c4c7a4c58cc7e86fb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a256564-16a3-429a-a21c-9defe9ec537a.json and https://artists.proofprofile.net/proofs/artist/6a256564-16a3-429a-a21c-9defe9ec537a.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 0x103953ac0fd9a3ce7a8f7ddfa34d6e78da640cfdb1f7d9f0d0870a58f5baff61. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLPF6772227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1591c32b6cda91d26f723877c67634be9712f8ad1026f3de9d9a09c2b39c72d3. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/GBLPF6772237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df63d955a95319d3589914bc4f66f0a3f2527383747f9b57e92ac7ca0f3e0e3. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/GBLPF6772226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bcf4e3563e4b89df7351cb43907370606576d570106ee87d1e65cd545a3661. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLPF6772234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dd4c3b9b837ca67d352cbd8eaeb0299446bdc3be6056ca9a21a4c322cc7001. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:27Z), 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/GBLPF6772225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb740ef236a672871c735096acab945ef47f795a2804a7dbfec0307fb90c9420d. 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/GBLPF6772236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd83ea7d946f822d3f2d3174ac00d91e37cc30f3f9da6458b5237c8db7afc25c. 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/GBLPF6772238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7011d2abcb99fe203c59afd5a0f34d18841b216a4d3d57a9e3f2f2ea414ff9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/GBLPF6772228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681eebfe1a2358f277e07f495a236e78b199ba258d78e547e8986d41647f2c8a. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBLPF6772229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e954eee95dc1c8294f200b5c55078815ce62811c98b3f0a068f2084e947228. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBLPF6790021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fedb076affd8ca317ff5c7299e0d65a02838022dc0a912700874ef0ae1b8b84. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBLPF6790022.