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 0x591052b46144621b660cf52016d3920ad97a4a4c20dccba057795d17e0dc8894. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f0bbceb-6af5-4bba-a27a-eac18930185f.json and https://artists.proofprofile.net/proofs/artist/1f0bbceb-6af5-4bba-a27a-eac18930185f.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 0x532a26d96869647e90e65a110b60118e2d43ff00c25079e4d67f98c0a76435c6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KSA012388117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1ea1786477fefc47904245f28f577a3e158e4f348ae1c793f118fb0e2aad1b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/KSA012388118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cd23e7103c017ae017595a8cc7f3a5effe3ff1aeec18d1e1b9a8551f70e34c. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/KSA012388119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f487f3ae0285b54bf48088c9ac107c014a8da87973d94f601ac4f0e8ba3f46. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/KSA012388120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbad5110a435486c9536867ad20fd618d7d9e6cfba7baf2a8897e126b4115ed1. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/KSA012388121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6ef9b9ae72a4d97ce3ded0680a935a548e7e8db7c1557ce57726e51d32079d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/KSA012388122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9fe6a625b7f0ddfddc3598033a6192eb064939943acc7aaf31024a4f5c5d41. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:22:11Z), 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/KSA012388123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53ea833c1bf3d3689415f6cf087cd42179bbcad59c78a76fd7d78006d1c1c37. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:51Z), 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/KSA012388124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7cdf3ea0883b1e6037c9539c37b0aa2883175e365f2f916ce073010e4986ca. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/KSA012388125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4f7c79d3e19dba79138b0852f71f9ad672266b1e0e5d5a6f095eabb74f6053b. 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/KSA012388126.