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 0x499b38c398b94496e70016e0dcd2481fa3a876870d8ab1a28642123de93da54d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0ab7cf3-5080-40c0-bf97-e27c4a9c5e2a.json and https://artists.proofprofile.net/proofs/artist/e0ab7cf3-5080-40c0-bf97-e27c4a9c5e2a.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 0x589c545e14b78f5c4903bb89cbbf1f02c50c1e4a78babcb26295bdd6002ce35a. 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/SENAA1801001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572fcde0f113d7d2fc9204022e28872839f92ec4617f334080682cddddedfda7. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/SE4YG2100202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2a460dde399cca2ea4c61a573687f7c69919b8900f475cb74bd5c0cb5fc037. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/SE4YG2100203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a22433729a572f004f15e9a1715dd93b6f7f53ea6844f1b95b43902f4d08014. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:14:42Z), 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/SE4YG2100201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79e8359ec4eb67be4cee1166ba446021650fb9a49b5eb2a6ce61720d2fc01b2. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SE6TI2390674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e8f14b3a8019e5171ac7dba3a14f2b18b4dd6456baf47851a6fde02f72dadb. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SE6A92308574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74972c4acd46073bf81d2dd77deb3e2e5d03371a6255aaf499b319164289522. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:12:29Z), 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/SE5BU2499553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b3374401798b50169e07c6584c65717bff95ec5c1014b0225c755011259d85. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SEXCG2004001.