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 0x7fd51df98c5114deaa988ffeb39fdd75e71f93706802c72cc851c9a987986faf. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3bba5fa9-222f-4ed0-b053-46fc5b2a8fd5.json and https://artists.proofprofile.net/proofs/artist/3bba5fa9-222f-4ed0-b053-46fc5b2a8fd5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hor Jevrejskog pevačkog društva i studenata farmaceutskog fakulteta
Jakob de Haan - Savic - Suplevski: Misa "Brevis"
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 0x8668b3330c17f5ac0cac1881fde0f44ded976533fdb887cdf1b5bfe4cfbe5be2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/RSA281501441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cceee7750605db760288597af13dade5cb0eebbf39543c6e934d9ca4eac01d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/RSA281501442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1cb54c42df840a7103a31092e856a65264c70748936954b6e4d90582a4ff751. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/RSA281501443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7943074a8934c97547d674c7a7fc91b362da058c682f691d91ebe28736aaa36c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/RSA281501444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8281e99e66a8b90b9601979564b8785a4db53321d3d1a20bc951ad0662e2d14e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/RSA281501445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51acbc937299213cf0295313c0ef05487e1f85cd934bed3c254bcfeb1d4f81f8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/RSA281501446.