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 0x7ca4d47f51bf01f259e9b5487b420da066038fab54263e5c32677f8949ab936a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae577419-4d2b-4634-a59a-96ae03cc3f9f.json and https://artists.proofprofile.net/proofs/artist/ae577419-4d2b-4634-a59a-96ae03cc3f9f.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 0xf1e8abc3f32aa5bac9895fffc86709092037d8fba206ca7e9fc15a00cf8dde86. 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/IL1022011933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5e1d1c72ba764b43ebd7f7f37f137448e031375fee08d660f085340b3297ab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1022011637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe249f93ca0d4c5acfe6fb574e0fe176eb8bfec71a41b75ad1ae5f90e6414be. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/IL1022011934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52c2e196cfc4c77dc39e89d4366f339b0e804726afb3d0648598dd5002286cb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1022011935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f316022617d555ca85a33d65e9bb948db4e76c1ce9eabfae46e0304665d1bbe. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1022011936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef1b9a0105bc3f217ea18657575f1eea6184de1a8aa7617a26ccd139bca74f5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1022011937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18adef5dc3ebb35d59bca087a7499cb55449a9c8259abc4d00937702e79dd36e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1022011717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4aabf39fce073807b22855fc402a20e1d87a8c588ef3c4ba4a108d6516fcf1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL1022011718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d10879048fd8d851b3906248aab20d82567944edd249fc1530b701a1ae0f088. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1022011938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e28a9b117758920a26afffa2adf2ef7688671c70fc61a5e5832bb4a8e580a6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/IL1022011939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5ec9884bfbd6006bae0d440687e10a62264f4701ad186efb47c3f11e543d78. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1022011719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ced24911d578a797f3a8d847ef6af092098a18ec555ced26647fda3a8621b7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1022011940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5843c7195c831f8b97d57a39c5a364bf61d870358bd5247312440dae0561e23. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/IL1022011941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da6d9c2df26a36af9cdbbb0b2d22a0cdfab904aff971ac3c614fcce1f2383ea. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/IL1022011942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9bb8a2cd0ff632c76a97f1035718a0ce0be91d44826a154175dd84db3540bce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL1022011943.