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 0x083db0b79c700f77507d50829247f049760e371d371c59e5b77288e13807dbac. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f35c149-1091-484b-b526-e20acd4b30ac.json and https://artists.proofprofile.net/proofs/artist/6f35c149-1091-484b-b526-e20acd4b30ac.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 0xa5a64c877041dd9d4a56fa61e0e8b7b74d43e7499b63fa20839e93f8c64eb3b0. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/CAB392404386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b3a46caae4f8c50e4f1d0cf0e879eb3e1c1c80d4303b989e9321b4aefe4f00. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/CAB392404118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a62ff1a1610b7a99afa018a669c51295f543d353479ffc606186e92ee0625b4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CAB392404279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ffe99b4a9f6f391e0a79c6341fa5e13c5531ec823ed5d82f2f4c8f3ab43ecb. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CAB392404166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2498f2e35dafd117738f74e8ef4a92d7d30f1530ed0d2defb20ed4975ef0fb77. 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/CAB392404387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cba974c17db0b27bd054f09a616a286d38b0b43e9ed778dadd1bcc9d73f2d7d. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/CAB392404388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5979e50931df8688363016136f16c3dd2a647a535f5d3f3b81667da0e1864dd8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAB392404385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b22933bf285889a8e875ff555354780817f2a35a709ddc0e6ee90d0b490cdd6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:58:35Z), 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/CAB392404389.