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 0x4f597be71d71d149a31cb3564181adc907bfe4a3b3ba55f35d48e8c1ac20ea6d. 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/2522146f-d6f0-4dc2-85f0-9056c6f07ba1.json and https://artists.proofprofile.net/proofs/artist/2522146f-d6f0-4dc2-85f0-9056c6f07ba1.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 0x10c1956d75fc0adb46a46685e0ada750f6f093ad24145af3811541c38819bad0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL9KR2325133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22610725bc8f621926ea4feb69f5ccb21dc63e7664c3e7b74a9dc3123954f182. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NL9KR2325138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5c362e26129c15a90b98e49dd762349038c2b2ae06af6ef3544ec0bc334e3e. 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/NL9KR2325139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dcabdf598584423924415a630d8d8886c6813680751201fbd223ebff8bf4c26. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/NL9KR2325142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b9bfcb7ac1e99fc1bf6267c34db2eb868c36ca65f142e90f17c2d5b5f3881e6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/NL9KR2429134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d63960dba0b0dbaaf33cb7933f1e269e07482a63869b56fa5af95df4faf2024. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/NL9KR2429140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0833eb44252870f7af0f97a35b41d6eb53430234ce622ee6e6d5eb8bd265e7c6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/AEA2L2472805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f8bc386cdbae1080d007a33c7972a288ef21f387845b17761b30c26d85b242. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AEA2L2472809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f5faf3fed988d6e4f0e1e05410ecad73a3211734039b39640599a336c8cf21. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:14Z), 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/AEA2L2472815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc600ef9fdc73c0c6ba1d1ba70193f9e61542d7f52c47a61e192344d54aeb8995. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/AEA2L2472818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d25cdf0d2aea2f9382d19b7de8f3a7b5ff42d36ca61e8e201b7c74da228e28. 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/NL9KR2433683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7c7cd8a2facb8f6b486ca1e7901d91e4a90bfb2a66b42cbf3ce7d7d4e2c462. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NL9KR2443147.