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 0x553873e1e2b4b5658eee62564afc40d69a14d5e1468d543ccb36e460dafd4dd4. 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/16b0f6e2-4266-4d44-9623-74e9da75ec6d.json and https://artists.proofprofile.net/proofs/artist/16b0f6e2-4266-4d44-9623-74e9da75ec6d.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 0xb2f15cf1cb0454ad117cb8ac3b63df8be718848d78bd8c7a59a4ac1d3d0020e5. 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/QZNWU2437569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51697d967b1611eafad1a38e0c176e534d2d16c8d4da784ad65c7322b3ffe609. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWU2437570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24664db6466a4ed31ffb7c45b9dd86a8328e8e6d109957db07c2b60c0a9da097. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZNWU2437571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a2aa54edc107acce11c164cde4d448331d893e1fb9e1d3b380ec3c121fc5e6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWU2437572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4394d975c27bcaaf70faac4ca6c7c1c3b1a5f7ef4a538222d7ad5c70a362b6. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:52:25Z), 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/QZNWU2437573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9057972654876c7155ba6a6f80e061ad105adef58399e0b889231d6c8199cd5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:52:17Z), 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/QZNWU2437574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46df06309cbe70e8e164109943549bf73042726334d4a5238ca36b6bc92a491. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZNWU2437575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f898e1fc12bede948db82283f9a56aa32163c749fbd41d1ad1949231210ac8. 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/QZNWU2437576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1569a8dd83060befa4294dbb9477f1612068057116bcc2f1aa3ee397d3b4aedd. 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/QZNWU2437577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90dfcfe1ed5605e5fcca4a0d3570ee391ca19c795677860331977267a16dea5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWU2437578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe041e3e9e86997531cc3d0a2fdcf193a822fa2d1ef4c70d576851af57bb8f82. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNWU2437580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b666e5234e8325aebf26e5bbfc64b11b1dc11a11dd4e80ca17dea5bd032d94b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZNWU2437581.