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 0xe8734e2d6cddf8fc54152d5b54a5bab5990b61027b9ee3593418720238a92960. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19d674cd-7984-4e62-a178-3e4251ba3cf1.json and https://artists.proofprofile.net/proofs/artist/19d674cd-7984-4e62-a178-3e4251ba3cf1.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 0x934636569c8f04e66c847f460fb7317bb07d01d1c3f62f3e69805b82ec6887fc. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US3DF1824451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977565f131f6363f5934a2e44970aef27b0950481bbb56a5ae207358224fe7b7. 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/US3DF1824452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85240a217f54827d896cd2ba849f8f79eff8639b2463562d64601a0ff472cf99. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/US3DF1824453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a596fbba5844b87d7f4c2ed6171378aa0a630320b6017b4c0f6fdfe0f021c0e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US3DF1824455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3d4e95c1ba4b0ae73af29b4e3bb4a9501385a79cb1d95b1e66fe3e0adcd10e. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/US3DF1824458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e1f7c180e0aa33f34cb0042d61d9526726658b17a31f34e11f8cde1a926f81. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF1824471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d52ef772941f6a4efef5aed33a4adce3ea2ce6a1f0616299b82c357a6e87bb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:12:59Z), 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/US3DF1824473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad0920cf0fcd153a565f84035f3a20b5c6f7178757bc3566bea132ea89b1363. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US3DF1824474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9240d2422a47f7675a3b1bb5c28f75d80e91b97dab7589c441ac9600627fada1. 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/US3DF1824466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc4f4f16f46bd2afbc084ea8cb8039097cfc563c583556823049f1216a2c57d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/US3DF1824468.