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 0xfec53b59be983500e403e8c02366e15844bcd8c0fcafaf9c8e298cd621f140c4. 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/48c46e17-caf7-4e2e-859f-eaa8151cf6ec.json and https://artists.proofprofile.net/proofs/artist/48c46e17-caf7-4e2e-859f-eaa8151cf6ec.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 0x1ceacb0d8ecf2542c39af7e9b055a40b162103233a45be021d252c1a6acd753a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/INN2I2505129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9e8eeea942d618872bb49e3618f4cef21eca84a242741fe7c74b11e5ff798d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USHM22436232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4e328845e43a5ef524131b2415be242d30198fe8c45920c624ff0e3af788e6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:33Z), 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/QZAKB2401808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcba8333e88a906aff3f8912b9582e16cec3c92d4e53db6ee4e5bbcab5e0f33. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM82459657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5c51006fad46738fab38d35e4df143ce8d785039073ee3708410adf6ebcc1d. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USHM82474004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6debca9de614e3340d1130cef2258c11710850cd8690bb85ab972faf14e5d98a. 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/USHM92433821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2d8ff618878a4b36f3690fe38fd12184dd4617ad655a12302dfffbba05b88d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZAKB2422609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fac2f8fcb5c074d3fe0e680a769cf5d61e4d2c3cf80a5fde183e9fae28d881a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USL4R2405525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a6e4dd4dc088f8296d7af938ecf0a05beabb71ab5538938f1a2a19ce80cfa9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USL4R2432956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcecffd2b5d731323d5b3a3214184b736f06302f51788242e0eedd0049166aab. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USY242403881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4863cc741b1241cf919b3fd06af55171cf1a2d9f40677eb017f16f41d54381b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USY242428440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f0889bf2c461193215424a41abf5a8378e16cec58a12b98d4458b5a417e7ff. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:28:52Z), 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/USCGH2572936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca9d268586a92cbc14aa3e83c4b3b1451d43f840f053e87c1758856ab632a55. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:52:14Z), 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/QZAKB2373841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363c8f33aa62202ba2edcb62e7598a1fa1195c04fdb6a28bcfc9c25eb0a62983. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZAKB2367304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6162ca26751de5fafe1b05271c2307ad92a7b2991357f5cddd600bce82b5397. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEZC62509228.