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 0x9c595b83df7311cf846aefaa677fa80629162c8e6bf4863ba3fa811ee75b3afe. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc7b8743-07d7-4cc0-a508-8bf83f8366c6.json and https://artists.proofprofile.net/proofs/artist/bc7b8743-07d7-4cc0-a508-8bf83f8366c6.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 0xdf15284b7c52289cd197415b20926ae5421cff9858965e753e37d3e69347f14a. 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/QZNWQ2517709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ea3db6be4f91c724c5db3c9cd0de2cc183997d01ef970e2ca7d1db2c07b60f. 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/QZWFE2462304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca74e85171ff92e074d03e034f324115539f10c587ead549f454ca2da9a1814. 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/QZTAU2461732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a6a5f7e11e8dc5334efe316d3dbfb228bc5142d1313fe3531cd6ff5efb9822. 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/QZHNA2402237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4815659490cc945329e49e47d39d8de54756422d3d881ac3133b9bf22e738f6f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHN72492116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2eb93fca439ab3a7511e7b42b8e694df87738e5c64e57a48cc119624a8fd96. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHN72492117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e94e232e648319655e7a9e1c07fdddfc8b85bed18995963984d5c95f607e78. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFYY2419959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f9b956590c9ae06b42cde89600c3f496a42e3140790e5845b0e9168170b70e. 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/QZES82418613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e94e232e648319655e7a9e1c07fdddfc8b85bed18995963984d5c95f607e78. 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/QZFYY2419959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee941b015a3ac577604c18247aec108e6219f56c0cc1cd1b1b22b63cb018f2a. 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/QZHN62362517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1186a9c849693d49a6bd169de300d7ad8bedca63c0be29e92d937d9218adcc7d. 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/QZHN92184828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881db6c7ed7c2f4f7c258fc9715c46bc7609835b48d019b65a5aca82218c7663. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA72112704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6355783e577da550f68704f7900f63300436b39b9dfd440d64c8cc9a83e42834. 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/QM42K2135433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x481d3c998203a79890d1412104e5f4679f8cd89b23f5ebf4a7975af3a58bc882. 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/QZKDK2154567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68720bfd31a4fc885a1c2f8dc869a88183cb797662cf24f301120734bdb7052c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZNWT2014716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42fae316975a551d285ef8a27c6c47dea659edecc2cf14817442e4854dc5ee7. 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/QZHN52072901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443a00f0075e976a538edcf83fad0c78f22ba83d62410b6070f6b26c9ce1541d. 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/GBKPL2091677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd539581dae0f91d5918c997a9b9ba314bbbde26765a65f47f55b43e60aa6af60. 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/GBRKQ2178929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb00f0bff0313edc8bb0a89bbf97fda4686b79e3da8f23a5cac3c3381961a0c7. 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/GBRKQ2178939.