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 0x0a64b7a2c8261f5b6b5216bf891162ada3e546f73436814e3444e9f4b75d6156. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/343aac52-f7d2-4e40-9587-c026a73564a5.json and https://artists.proofprofile.net/proofs/artist/343aac52-f7d2-4e40-9587-c026a73564a5.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 0x2af0f18010b94c4a91c5d7ad12b0d57f72b2f10937bdcf363f182b76208bce70. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCJPQ2288246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ee3c44395c2b3e1c72ca3d1e32e1ccd2cc05b150371c04461bd49080a7409e. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCJPT2239588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93e69d8c373fbb11777dfadd24eeea2cc2522cf825896d81ed2fb10dfe83ba9. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:03:43Z), 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/TCJPU2359618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cea655d51437ee7eeca240c323c14888f807c31caca09f82c58252748acfc5. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/TCJPU2359654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c20933053e91ce2fbd04230aef051eb331fddbf73026525678320082f84b50. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPU2359662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c513c3d195cc3fb0eb4a2011f59b66e79ce4e7a6e0c822e1c9a5d5c1ec05ed. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPV2326373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53624d8f36926b3906e0c1273acc014b207cd29cff5ae48e57bb111a40960953. 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/JPPO02302444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4adfb33550718a2ebf1a83d97c44d40715104a427e2db94b4c865c367fa1dd. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/JPPO02302445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6cb83a3d1a2fbb3b3bb67d04584be016eef74ea73c5e0a61cbcb47084b4e11. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPPO02302448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1862ff32f15acdc440578a6e146ba6364ed8af88db7f1803786ed9fc0b64357. 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/JPPO02302449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855729b7d504e069c5d755642be2e2369799f5c811d27811184e4e8d71f0b75d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:11Z), 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/JPPO02304275.