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 0xcad2a8440709e373ebe5355ef164e98a513ba1a1771baae90ef597f9e7afe4f1. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b79a7570-cc09-4c40-9d51-7179046d510d.json and https://artists.proofprofile.net/proofs/artist/b79a7570-cc09-4c40-9d51-7179046d510d.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 0xccd22492bdc70c113407d2247245cadb60c0610ff463c5839e69b9c7049369f9. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAZ700802922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9adfeaeddeb313569c45e6a0ff35dd998e7c0501f36b6df8a5d570d909a2402. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/CAZ700802902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c7c2589448da5dac3b2d2653f94858878b3b5fd25ae47119fd43825af9e2b0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CAZ700802905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ce3a4171cd8e67d3cf9522c36c8bad14cae22bcb30d2cb55c255aafc26f36f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/CAZ700802907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d50fa1b690fa7d357471abd243347c4852f2d49d640d82ccc4b136c8cc8fdec. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/CAZ700802908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38113e41f59a459faf652a3832a9e99e84f373b73aa214d6ba6e8cef97a36a01. 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/CAZ700802910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13aabd7e0821e3a2bf7a18250df2aea6b64192e9ef50f154717adf22c9c0a30. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/CAZ700802914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb08ae712feab181620e0a0068c1b4f8cc32ac1a24b10b07b58983adea4ac54. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAZ700802929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050f88143aeefc7eb43e55a8e3a32a00517b9b07c6fe4a94fdde205e95a4d21b. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/CAZ700802931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5edc41e4bac031eddf7f4202beff3bbc6cd467802ff29409fd033ca8e4fb482. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CAZ700802932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd1b9289c7a6c6d453bc5fc2ac261e0c2db9aee59b10d6fb262a345679e971d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/CAZ700802935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3858c52a9d926a6325e7a6dc453f00ea8dfa4affcfd5b21432a5b41bbf6758a5. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/CAZ700802937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ed801893b44b86cb6b34c13c14977e61d48a96fe78fef32cef312700c1d16b. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CAZ700802938.