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 0xffac51b7fc8e839cdf79555db3142bcb1da1a6095429bdff289a63023a96f901. 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/6cbfaf19-98fb-4e76-a2cd-ccb8a1d7ae3f.json and https://artists.proofprofile.net/proofs/artist/6cbfaf19-98fb-4e76-a2cd-ccb8a1d7ae3f.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 0xdb86fe8b830cb6b74ab96004c39f3cfc1b456f27680d9c75233ce15edaad4444. 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/QZTAT2358990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9786373673df23850dd0ce69545e3c157e2269d9aaef0f480f54896c96bdf80d. 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/QZPLR2284304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66b30317624d97eb72d76224709ec42a0dc20b8876808968a528c299726d670. 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/QZNWT2272815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cee8fa4758ee1a5481ff1e66c946fe9e31a8c3ce55944616838228cf99c24b8. 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/QZNWT2272819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75e06b8f64eace84c00600383294c4118cdf8168a7767a1ab8053cb0c1cc20b. 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/QZNWT2270725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfabfc06f3dd791e5e7689e876e93a30e4377ef7b53cfada8e37ea8f0a8c2d89e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZS642137641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a11574580e5f35d3d7a1f1c279019bbe07216fd70773a156ffeb1afcb99db2. 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/QZK6L2108515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19f3334585cea8683b64b8b2356a62bcb8aec60a27cec3846f516fec18d8695. 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/QZHN42331985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5438d3e8f344b8a3c3515a62afc538d2acd6c9eb34f4f9a71acedaf6b63a48d. 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/QZTAY2405275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ec923b745ac6190aa90ffdbac3e18ae4740f54966d0ddcb5eedee2f627a4cc. 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/QZPEW2461994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d77a1858f5e8fa8d0fa9729470d7b3b793f9bf83878dfddf39e9112d2c581cf. 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/QZPEW2461995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2716370cf00637e81830c08fcf13ec0c55234162c50609bc504bc347a139a8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZPEW2468160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0970b15df2cf62facff37cb12f23529e91156fdc239f5116b819e832af68a9. 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/QZPEW2460941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b804fdb8c0c673ae09b5ed0893b91e0117e3ce4192acaf119edf7822b3902b0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZRP42255300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532fe198b92ef5c9d1b4edde9adf3914ac2b5c96a592e9eff90d803fc55b6f33. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZPEW2468043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ac0c43ba53a284d4c71f7fddb4a058184343f1274cac4e338d6bfdf66577e9. 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/QZPEW2460777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7c729ec05c2c98f35eb9836a274dced46a26127a2a864c9ccff26516389e13. 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/QZNWT2284363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986ba3d19adde014333a611176e9086e82b68f0b3e0f505a5788548155c7dd2c. 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/TLVEM2457139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a4f204c9f4ae50650c81f3df81a6097117a1f3a398414b2f2cd3ba336e5820. 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/QZTB22289036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b8cd55e6cb3dd09ad486ae46ff0704e719946b2efde6f422314b563b05b45d. 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/QZK6K2354931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eed211d9bae1e28a87aee94e02257f76550a2751a5fe2ee30b9c8bc0f18d34. 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/QZMHL2311349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f71871c0578594d24f39614929feeaf6f91b3d60d49d4cb77a9330bc9d6d54c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZS642379834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110e42675b5ba2ee6e48588b16ef20132f84a4620f3c943c1cca7e270b727091. 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/QZS642310115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bdedf04661d2e9118e0d12d3f41359e5979c142d7bcee09436c187fa480df3. 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/QZMHL2314629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9a2a65e889eef7a0746625987d6e97e5647d4e199ea294be31453604ca81e4. 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/QZTAY2235735.