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 0xea7bfcd1a5b1a19ed346676797ca2bfc9ec0e959c76e9beddb69abdee36bfa0b. 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/a5a577d9-f7dd-467d-833d-5fd60e514f0f.json and https://artists.proofprofile.net/proofs/artist/a5a577d9-f7dd-467d-833d-5fd60e514f0f.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 0x628695d806495e1cc3f252ca378eee1c2be41133e4e4fd8f94537a0f6b002cbd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/UKR6V2253729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b78d3689390d6cf08f9a1b6c5b14e584371e22d6b4365f9c16d4aaf2e1062f8. 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/UKR6V2253730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e7e95e3910aa4fe0f67f7aab59adf7b53b6d7a424ed725d40226d4fff1d5ae. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/RUA1D2319727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf6a4a9080d0eeb169662cf9eac408756232020e3d53c1cd121fa4e10d6a015. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T16:33:27Z), 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/RUA1D2319733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f52cb64202cdf6b6924e47b1d790feccd90a1a88c80894fce4c88b48bdbc343. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:22:55Z), 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/RUA1D2384435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c87cb94bf895e9b9f99e06ec0c09190f7a731802796c0ebed64d6535a3ac1d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:42:57Z), 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/RUA1D2388404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad35b316c70a02fc5cf2d72325b4e9e5cc49387444e4b1b96d2988caf1c8c33. 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/RUA1D2481008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8102d9c0177cf2eccdea5d3cf618a82e4a3af9ff90b99dc4527fd300986c70c2. 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/RUAGV2406275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789975c3a541fe38ea8d8305aeb2113ae767c43e98033742e4cf89654370d809. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/RUAGV2408834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1dc33302a021833f4571152bc69dc51504cbbdee4b14283888d3018911f009. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/RUAGV2500076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb311926818a164b4d7765d3649508f42dcbe824242e006f0ef95bdb87e74e59. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/RUAGV2500208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab7eed4389478cff1f9511182258b0af68e508a7b917654b3fc5fdd90d8b391. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/RUAGV2502173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f86823c873f465a5f42b63e68aa2f99105d02a598ff74d6b71f4501aca3baca. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/RUAGV2502617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c14346b622af768da4d5ceb2b1bd689bdb6a1dce6199f80d266b21da9d78d6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QM6N22582437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13b9ad506bf137d91f79cf4f7fb1b1edf0047fe0519ce14159c463a8ca39be4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/RUAGV2503768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd3413e17645607e0b38a500f8f4ea9f8fa171b380884da4179b1cb81b1c5fb. 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/RUAGV2508802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc271759e7966d95c96f16a9d911f46185bbda3cfb361705aee5a2bf4d87cae. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/RUAGV2511997.