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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f65366414f424d0853b63e66b0736fe257b6f1a3693b75636b74518908001f. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c15926f1-a8fb-4549-a9b7-382540603d59.json and https://artists.proofprofile.net/proofs/artist/c15926f1-a8fb-4549-a9b7-382540603d59.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0164136d918f54019d46bc80cc9c4812bea85043cc238e11248f961f6d49bbda. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BCLFL2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20935b1b0a83bbabc4ff34816cd654a38f98333862d07f3a6d3d9f5b86edc6b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BCLFL2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d7902ae28dcede7e0ba7d8243c0b2fb789581f5ac63e9f64343ecda9b7a4a4. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/BCLFL2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69598861492ff71a040e1a7a66198f6ffd7760f643fc0a274e2d915a4a12639a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BCLFL2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2d232378ed7df37944ba166d35d994d9bfbac2c9353041fb38eacffdaabab1. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/BCLFL2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36875361d2c56c41a0de623a47affc488a1e5ce63c9dbcfe9b2f574e600392f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCLFL2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5bf27b27f25b66cb1e96c67c6dac74badfb35058a2487822c0fa0c872222167. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCLFL2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5d5c3c4cba762960cf6bd3b0d7cb5f344d9b7b4eb7d914567b615990822d720. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCLFL2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6d7c3f3fdb4216922fe23c03f5c8671064c3ac58a071a3a70d7e6fbd92711b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCLFL2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce593515e162a78f1f9a95d6b84266ec9f19a4112711e69e47905a48c8c2a53d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BCLFL2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ccab9692bdc4c68d08f44a37ab15606a20409ca75120b44e095c18822ef04a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BCLFL2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19036582e232785d55692e56350fee5d773f956ea238c1d1878f9b4e77d19e74. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/BCLFL2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad82df75c6886e53268f42d96424fa14e544ba2cdd3ed39d5d5dad39ed3db2d. 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/BCLFL2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04befc95ad8775f4bf692373663804dcba4c18c7a0adb0f3e49391ba112bafe1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/BCLFL2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1553fad322261ea5e195164ed2c55bed57b513fe12029b3a6c80d34ea77f108a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BX8ME1900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1c0c2a9848e512159e79a35d1fbe0e2ea37b3703415dbec4a5b39d14e24cde. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BX8ME1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0e1b712a481be92f1fbf8d22ed84a256f0217ac52bf4a859be5bd383c25cd8. 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/BX8ME1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a8f86cb43ea5a62a1fe24c37e5f798f821e7478177c20e6f4bd30b197899fb. 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/BX8ME1900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598d89fe6cc59e0b61ff906c9eaba8a7f2ef412ca2a9f1489fbba4c98bda55c6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BX8ME1900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f16732d6742ad29d9879e85d62ce44ec395523fc1566c34362af228a8e35346. 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/BX8ME1900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6b2ea9257839cc6e0093452188d77bf8e27f810fe01b9ab96f0a950d4a2b2c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BX8ME1900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce68ed23b94b48c5bf517f2c04e8d034775fc60090876accb00c2539ec0194c2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCLFL2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbc3ab6ea3ada32bb4507f9d1c85a69b8359d33096a5baa33d0564e007bf408. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCLFL2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf00682c2f64b68171cf27ac7ba1af311a7129771c1331a26471458b2b626405. 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/BCLFL2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7f223107a05f8aeaac2466c683b4b493e7336453a4ce8429afd29d03fe9f48. 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/BCLFL2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13a8fc815c7dc173c14fcfff1ed0fcc5572e45521153294648371cf88a09d55. 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/BCLFL2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9e13451b5caa419f88e56c2dc91034acf37ab7aa544b28911900c39a2d7400. 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/BCLFL2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca220b8a71cc76af1edc1cdd2fe8ed2dc41c304c02e2ee7756068ba94d33970a. 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/BCLFL2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368452845df91fe41323d5cfe951b52d03cd3444f856dc143076c92f21a1d626. 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/BCLFL2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa337b1160a91c885a735ff4b11713221375a9d82bd156d94dbd61c7f0cdcfbf3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/BCLFL2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4694deac340d77c22bf8bd9cacce8f1861356a23f34d7d40a94db97bbc5a922b. 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/BCLFL2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ded65d7fc0f06f45cb5ba83a027404444c63fd6ac66b2844c2750c7983bc502. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/BCLFL2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d02b411ee61d13d56e4267581f376efd91074d2238bf7e9995be6fb40e1344. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCLFL2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9f010f628e3a474210472dbfe6980faeae4daa3f3b71ac8d8bb8bc2c48fe0e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BCLFL2400028.