thumb|upright=1|Bas relief of a seraph carrying a hot coal on the walls of the Jerusalem International YMCA. A seraph ( ; pl.: ) is a celestial or heavenly being originating in Ancient Judaism. The
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 0xe3940b9761768fc5a38a23f6980f9a626e2beba306b069c5fd02280fcd1b1917. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1e79bf1-23cd-45e3-b8ea-9cbcf2604954.json and https://artists.proofprofile.net/proofs/artist/f1e79bf1-23cd-45e3-b8ea-9cbcf2604954.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 0x868c190d6567b5b47f059e1cd71151a57a2a14d736da75ad5d6657a65dcc48ed. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPW2384892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703e5d47d7abdb502717b050bc97995a7c86356d5af2f6aed067f62f51078d12. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCJPL2018650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c26993e2f737de88d34fd73dfce07076b9be4ac0536fb49c51c8c91a527ded1. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCJPL2018659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f31600fd86b0a333b695704094613f09b52451954f52bd7d403d6128a5af9cb. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:08:00Z), 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/TCJPI2579825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8246c4f0fab4a7d10922a99151448a4025841a6983db810657d612b102f841d2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCJPI2580064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2523964df7bef943515e17e834b6bfcb176282ad37e3c0b12e53af8964461ea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPI2580072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f31600fd86b0a333b695704094613f09b52451954f52bd7d403d6128a5af9cb. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPI2579825.