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 0x512d5593225422010e904d521b71f56745456be15c72fea4b92e4f26dd5e7a97. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b836f148-b912-43ae-8537-d2d08f659dd1.json and https://artists.proofprofile.net/proofs/artist/b836f148-b912-43ae-8537-d2d08f659dd1.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 0xa4bcc4188bbb3ee049126082939f0ce193c3b643bfafb8a000172b913eeba09e. 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/BCGCV2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c80bd4f42f7cfa3f6cbf6f7bd24d6c0587753b33bbed83a6bcf65b801e0a797. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:14:44Z), 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/BCGCV2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a54eb0b7a8cedd9739ff4ef806f4efd86476a420f4a3e1add63ba4fa492fa11. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BCGCV2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13424c9ccbc05514ca2300c5b60a5ae143264628fed00e637bd23e6f618bd9be. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BCGCV2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4282d075c88c91212fd4ea05738fce1b2a6b4a76a6f2ac24ce148044c61a99. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:31:03Z), 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/BCGCV2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1650b823289cf78d01bde4962e171ca9e3320cd84a8b904d8d6fde5a8f120eb5. 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/BCGCV2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe603e9ad1526a2bac05b4815c4034d5249cf49bbb4549ad634cb0097ba577b82. 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/BCGCV2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe203bd6b109ff69c8493ff1e1c53048ab0323be9c321d8479646749f7a12d429. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BCGCV2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d36f6c3607db18e26e7a32f88bbd9cd5b5290612c2953f4375b0c5b4d2d0bb2. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:19:36Z), 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/BCGCV2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38780709b9e3c9cacb22fd078463197c1a185a21b95e3fb8d64f05ab2853897f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/BCGCV2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e198b45070a9c71b0317e32ad71ad8db2f59e48be642326362dc2de305ff71. 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/BCGCV2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd836991e3c4f401c6766116e08c3bce07e3d080b728cba88f101f6563cdf12e6. 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/BCGCV2300002.