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 0x5c9362c68a141d4d7616ff65d52bc317d7ab53b804b27bc81c240b6a26d92f96. 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/4cca5792-4dbf-4c47-8e96-ae7c7126b95e.json and https://artists.proofprofile.net/proofs/artist/4cca5792-4dbf-4c47-8e96-ae7c7126b95e.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 0xa15fcc3d3672f83f5cdf89b018c145201e8dcf90e42861e4dbbae896214d3df2. 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/QZDA52425111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc8042a6c1a9feb311c59c443d32b66fa90614142e5efed751a4d1d6a8c8db8. 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/US3DF2403863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa55a9aca4ecc6ff75f04cc5391e53dc500f0a239f506f5341e79784444c1378. 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/DGA072463233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5636040db84d968e8380d825c5ac423c9f146122ff0a0f9b115836a4cb29bca7. 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/BCD4N2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cafd3f6c87d3221af143d9ca5d30cf72011a7b39d40e863994c4a8fd31ad188. 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/BCD4N2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9410c829df9a18bfbfde379ee5c59e46090a81ab7eb1a86d53f0d5d2ebe28e. 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/GBKQU2197297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118174ca91b1efcb734b45d754d947471d772869ecd9052ff55f896d6ebed175. 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/GBKQU2197298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb52911a2ad77f3648ff2687edeb0f4b8f307d21cbedef270f0cd7aa8b5175c2. 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/GBKQU2197299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f7a67a78b9300be90ca0393b679afbe2a787ee6774f97e08acabd69db2866b. 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/GBKQU2197300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4996a9d248bd2b1bf28765c8cd103c6eb052ba60d471ba3dbd9b2f422654c6b. 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/GBKQU2197301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea506e776eb5ab9f8692f80fccf101db3477465414293aa98594c06357f6521a. 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/GBKQU2197302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba7cd0717c0cec4ff656ef0edb2e72924eab8dc2b01d2aaf818ed5555828316. 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/GBKQU2197303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384932fda932173e185d8931db9c0c6a139eeb90e22e78c7b24f07a3669ef03c. 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/GBKQU2197304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ab2454ea7fd1ba71df2ecb8b748a94f66fa33737c887bece8ab8fddf924c91. 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/GBKQU2300183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf603ada949008a22a6fb1aa9752b36d27aac968b0179e5749712b0b4bc9967. 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/GBKQU2237577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb64ac8d373e488affa62e2851e4e1e47d3928f8c008193155d8e6d37b3d698. 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/GBKQU2204512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86956184cf57d4d7c6aa994d1e3e706d55d3a8211a05401bb2c7e1b94059fd64. 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/GBKQU2204505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735f825fca2df9b9990ee3c457f5a2b7202559315afda66c62f5b40394d1d824. 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/GBKQU2204521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0f3cdc8a1f9ed2ebec0abba8e00593968b723062188ea95c5b845e63cfe202. 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/US3DF2412749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e55595e00f089c887ba7f8e4dbd45e5f42ec65371d699c8b17d1c87ecfe23c. 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/UKZGC2303609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8bcef1fcbe1dbd6ea1ed058f5107ff73921a42741268752b64e8e8eca65839. 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/GBKQU2139467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593abd7a563f021d635b8d5f3f64a06fe084a118f051fc79cfda0aa957819679. 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/FR9Z62100078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eae12c00c38ac5ef44a3538cb4a1e35180e8c3aeb924f3fc0bbeca35576c16b. 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/BCD4N2300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1fbd06138b27211b06ca0cbe264f5de7b6c40b685b1aaf23de2e96965708cd. 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/UKZGC2307390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00513ec3b553a4429d004481c08ec679f14379ab69c13ebcc4c3eba3a9ce1cd4. 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/UKZGC2307383.