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 0x68325d919b21893c40c0768a5fbdde502f43774a881beeb011ad68b99b9565c5. 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/64db6e8b-2eda-47fd-8f1b-a83d368909a8.json and https://artists.proofprofile.net/proofs/artist/64db6e8b-2eda-47fd-8f1b-a83d368909a8.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 0x03d818ca33e68f91b42d0f2ce2755019bb84e3853dd317de2a6e9d9f3319a14e. 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/BEY912200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6ab22880a3030002ba9769bfc5b874cb8cbd02a00345dc0d8c6d8dc651a1b0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/BEY912200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefe4adf42c32db4565bb31a9a9ffed15d187140247a9f1a1994c16055bc56f6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BEY912200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8557f73a0b162fee4e901f4b809037afa0a0512b961a8fd5f3feff201617961b. 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/BEY912200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7652cdca0d597f7e3c6ff0def44f1accd5c921abd5e407a58a1e8c850d728bcb. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BE2NC2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92123557f54090fd922a2ce758b8eaa5121d76ec4849448318da67b8d683d88a. 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/BE2NC2400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025d4d3c9116aafcaa94be69a4df33ef5c17b1037d4ff646ae79f81b590a30ec. 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/BE2NC2400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c06855a9b88b87b91e5b6ec1a2273e5728b862bbee3f1747ffb27fc1f61f0d4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:15:43Z), 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/BE2NC2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7652cdca0d597f7e3c6ff0def44f1accd5c921abd5e407a58a1e8c850d728bcb. 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/BE2NC2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d357af9767402b847baad3e323d6b0da3785f9ff16a4f9f0c4613e918a73bb. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/BE2NC2400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2fb0318d7312ec4e86fe7a7a027d8b2b77c24c67000998e1a1d4f523467eb8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BE2NC2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbb73ba96bb4d1d04611c999feafa0fdc485d42cdab27862bd331c1ab52d781. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:30:26Z), 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/BE2NC2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16d5e4c5c8d4a89d03be654a98e36a8aab28399f54a3095d540320e5eab697b. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BE2NC2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d5973c273f397e57e052edc823d46fc0dd66e72e624d27bfe6fdfb8479998f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:41Z), 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/BE2NC2400051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d0110c3b4c257642fc69e84f137cd457430a3a072bbd68603d990dcdbaae33. 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/BE2NC2400052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd866f4607ee98452fad868907b53dccd00584cdd599f5648685844c9bc5d49. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/BE2NC2400053.