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 0x311ff662a3fc8fb9573d17ae8e06436fb9cd32c7ff60e5665b2f02a4c065620c. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d3e928b2-4a8f-4d18-a933-b046911753ba.json and https://artists.proofprofile.net/proofs/artist/d3e928b2-4a8f-4d18-a933-b046911753ba.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 0x825866ddd52c2adec2eadf8134940c97ab02d9d13c85a367ca21ee78d5261647. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:06:19Z), 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/FR10S2463563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04d323b3c1f322b8e9d4fcad4144508bfe772e09070aba7b80e0d076db03def. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FRX282461109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10cbfad69b5a54cde69230e609bab1fc9d0f0206a5066f9dfb364e4e4faf1381. 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/RUAGT2450794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cc0a04c64edcee8dcc987ef0fb3097771155b9800305c58d33edd9292cfe60. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/RUAGT2465694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc29cd424b33f1a731f12e2ff656f2b9e4391049d81b8637932f061260ca8f1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:27:56Z), 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/RUA1D2521766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec248fdd98049503ad931c5f947482d5e4fb1f25bb2845765f63e4331b900277. 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/RUA1D2539173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc29cd424b33f1a731f12e2ff656f2b9e4391049d81b8637932f061260ca8f1. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:32:32Z), 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/RUA1D2521766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6fd3a693724dc709048117f572b67c7bbe5a598b8503abf2c28df66c24f494. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUA1D2539177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4983f591ca6b24a6687c28e472362c928f1fe5c3a122ef4ebaadf9b465371f80. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUAGT2551187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128d81702f1b5fdfa639e88fe8548b2a649e2fcb7d77b90745220e1e279ad829. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:21:58Z), 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/RUAGT2551190.