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 0xbe33289ebacd489c6f925c0c42215b06e734c46600fefb3aa9a976df01a9f2a1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da0a20c7-4c3c-4c02-a668-23ebf2c8154b.json and https://artists.proofprofile.net/proofs/artist/da0a20c7-4c3c-4c02-a668-23ebf2c8154b.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 0xa0db3c41ebbed39bfb360dc476b6f32fde65568fb11f0d58121da4f418afe4d2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRX452241314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b98d205a19f4088202209fa6dc03dec73b12b46ad7e31e2f13a1f1fbc1777a. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:06:35Z), 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/HUA612303054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7683f37db1bb0127f4290b22a610a7806d10c898f010d985a2633821ccdd048. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:36:45Z), 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/HUA612303055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3bbc39e78f3f83b036acbd70bd2a8369ca65b97a787f1a1e8b262d24539ec6. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:08:19Z), 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/HUA612303056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa389d86d5ca47c21517f42fe004d3dd24069045607f76667cf6842bbeee516ad. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:45:27Z), 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/HUA612303057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3150a85e4f38b063809177cc2cf265f1e8b5b4d21fd4a82bfebe141bbf6d96e6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/HUA612303058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8677e46882acfa00209ba8590d72d8562faf91012b4864b34d9807a26e879601. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:14:37Z), 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/FRX282324853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9e504bd4fbcecb80368c838b6af3991364464dd8a3c674393c3aeafb544dd5. 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/DGA0R2336295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ecc7beaa080de3cdd8e730a4b8bb4bee6f8a431da89ccca90ca5f94f0ba388. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:54:57Z), 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/FRX202413159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce3f149d6f1b998b9815ae53edb8997767c9e3ea0d74e18504fee14d46b2a03. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA082478418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d086b0af73df47af385332e56f5ac9e28dc76da85a3ea68c76453907e9b2741. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DGA0Q2494958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389e92d0f1e44508416973d883cc0d4f9d7656470e970620fa92ca068064d39c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DGA0Q2494959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506c823460f0b9e5bf5fcc6e5822dc993785a7e5481f59bf06dbe5e49e527547. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA0Q2494960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e658646c0e98a96c680b44798d7d005d8e08d7da11d704bec25a2d99727513. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/HUA612501553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274ae076684a01464fa826625dacb1f137ca76b0aa9c5147584f0d89b425e048. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:27:42Z), 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/DGA072505415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1796965c7f46f86074e8de74c28a04510563b47f59dcbf591744f0d91a6e179. 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/HUA612101171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cd0743acfa76730a0b8baf092bc3d0cb4c9b625b7ac7cce47d300e2038b067. 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/HUA792200087.