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 0x72d9a463f2d55366a9e34ddd394bb2f7163d7bba431749b3135ba892d26bc5d4. 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/207bd381-eb94-449e-9fa3-9917db1cfaef.json and https://artists.proofprofile.net/proofs/artist/207bd381-eb94-449e-9fa3-9917db1cfaef.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 0xb0b90d9dac4f6dfa12f2c12bfe3ec58d01f044f0416248e3589b8e1b411ba7f5. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/FR59R1676967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ec17589f356ef4e14c310d3af9297720a4f0470e60affefcaadd1af50bb027. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR59R1676970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1a0a8d3e533d813b10c9fe1614693f2299fff7114de36290435841711228a7. 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/FR59R1632632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb87cf7d796a8ebdcbd32022e96f824da973f25af61305fbcdba5012b22f4a5. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/FR59R1632633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5544e19839110e7976cad686dd928643e439e20d301b5fd4423d4534817beab2. 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/FR59R1632636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a073e17053ee50cf15d97018a0b5de063c4afcb847c43e1645e17b04de3b9a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/FR59R1632637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b0b70ac718dbe8ecb4c34b36f2056f21bd893b98374c7899b2560e30f7e8d3. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR59R1632638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b167e436e9176cb970405ea1f81f33e35275f5e8ad80b281fd69087ef663af. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR59R1632641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5db3b0b35a5b013caf8d0a068baed1ea956550db67bbc19187a1c632bfd2d2. 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/FR59R1632642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc61504dfb4da6f8c38b2162773b4225de95b0aaa9c4b910dc6ab46776740e8. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:37:54Z), 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/FR59R1676971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c881280a3f7cf91c724a5a2933b8127288ab81e8948092740c5b460aa4c9aa. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:22Z), 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/FR59R1676977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60e415787e51e84fb083260d19cf1c6e7a1da2ac6a618bb067d23a7df062dcc. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/DGA0P2437721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4507acedb62ce30264e8e40b0a2c53e8cc1fa51e1e54e9cc9d3027b701071275. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DGA0P2436541.