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 0xcd1f6b360ef66a18f368a687ed6260921d1bce776ccd6aef4bc9d60db7f2e4c1. 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/d5202895-476e-4a67-b87f-092626724763.json and https://artists.proofprofile.net/proofs/artist/d5202895-476e-4a67-b87f-092626724763.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 0xa6e605f9f50e7323a28a43c97e6a8d389ef518cb9a961f427013f0c6278e7f5a. 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/USAT22005183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8c9cc9f23f41dc1f429a550ad9befa61ad747574fc89d1edb2d7b6de0feb24. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USAT21906911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8813a0e2ed94f6429472beb4ddc9dc2daaeb383262d9c5f87c338309cbb8e89. 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/USSUB2041701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39aa8d6c6a65ee6e649322da57889d271899822e77b242aed82808f74b0a5679. 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/GBCEL2000537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed14d197030444292c14187cba16cbddd46428abba09bf7a4a6c886af7da308. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USSUB2039801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd5e33ace7f10556709617a51771e39ce11a50b29d2785d7bf3cdbcff33e880. 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/USSUB1932401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dd7039474dc0dc75822324daa2e358a9489b0de57cd8f42c836820af39a300. 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/USSUB1932402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba867a45527dd47e0d2e7e2b2dc22eda7321c537f1d5ec5e01eeb1f8e857d4a9. 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/USSUB1823601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445eaf948f354715444af4ad6168f074986c62cd3998d40cda7e79b55d9d6396. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USSUB1823602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a39abfa4c24b2d590fee6f7bb33bf6d5e6e29c96504d15041757ddad0cb6eab. 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/USSUB1823603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03657251bcc1f0bd7946a355d47a5828988344bb4f094280ed88f6270e6ce28. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USSUB1823604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a16379d1f3a617a0e1ecdf17463b124dc5f1f154b188afa745f65a264e1bcc. 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/USSUB1823605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee890e6b30a79793f34cda759dfbf0dc369c965bec0fb6e52fd0c51da4ed8f2. 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/USSUB1823606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d65c7eb3b8cea182d5b84571fa767c1738b226ebe546b7cc87bfaf1624a5ffe. 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/USMAF1301801.