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 0x90565d3d6790b434ae3f1d0df4eb0864f22705f94fc866c17e3e191ead0d432a. 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/458aaaea-5b38-4cc1-bd90-5be9d95dd273.json and https://artists.proofprofile.net/proofs/artist/458aaaea-5b38-4cc1-bd90-5be9d95dd273.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 0xc1762881ab1971b923fec403a4114744ce3a27fea4d128f5edc797a694acf72d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USCGH1618839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0a3f781e940cead4fad0b61f367a90efc34acdfb970141f293b729134c0570. 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/USCGH1618842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405416700fb6e8fa497bbb86bd2530ee5c467e1011ae0d52d549f2e0b209737f. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:01:15Z), 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/USCGH1618845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c678d061c888e5a486e4175a828a0ca8675c259e99c0a23c38a25781d3a92f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCGJ1795031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b0364fe4bbac6d1aef850c76775c596b34a7bb1a78e2fad5dc5a3024057af2. 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/QZK6L2062984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b90bf1de4d28557254768d7a6d880e0bfccae1c5fce0bdb8ebe39384fdf3ef5. 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/QZK6F2271362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa02a5a1f5922ad2dc5c7e7cb259b00d96e5b9677bec4144ac022f5abc29f4404. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZES92319706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b0364fe4bbac6d1aef850c76775c596b34a7bb1a78e2fad5dc5a3024057af2. 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/QZK6L2062984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd5dffc0f404a98db2151459ec5b83606d3753c23c7af8f005c6f92238325d0. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZNWW2432703.