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 0x3fec82876d2fa00998e89a6bf279c8394109f5730c348a4e7eabb3bd11dfd72c. 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/d3228c09-ad0f-4423-88ca-c20af7f38fb0.json and https://artists.proofprofile.net/proofs/artist/d3228c09-ad0f-4423-88ca-c20af7f38fb0.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 0x08ba1d70e013762e17df30070041ade6a35a6566f68e783524b0273ba5647091. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/SMRUS0068428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a01217c4936caa4b5c1f81247c17ca01883f7dcc79ac3a453ee19e1b7ba3c61. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/RUAGT2219130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba20db2516ddacd3c6d9e05fab7fdd10ef14ff948decaf5a719141fbf375d70. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/RUAGT2219131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ef2dcf71183695b81e55c3a1a3fb6dfdda7ef937a2d21e18791d6bfb5329f2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/RUAGT2219136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84c1cc5b1bf275121cef3c9bc7793690dd704c720174eb1a7abdeaf7a71838dc. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/RUA1D2323545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a64bc3f803167071abdd899be594d5161745dee79b13f8dc87035bfa6492b8. 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/RUA1D2362086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa464d238482becfb70e6cd1bdbf3de0b2a14ab118d5a8012ac2e1e093b9cbea8. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/RUA1D2368484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f4e2f7e0f35485a85fd6acb6721d58b387edb1cdbd0dcec5f7418e51334a65. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/RUA1D2434517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1770449a5524f6c4ab5a4de623b16cf09a11a6266eea54a2a34ec01a2e15afb. 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/RUA1D2435054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b53f5f01795b933953943c9480f3c626533fd75c684d1ad5f5979da6ad5e4c0. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/RUA1D2435059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c500a20b60c7d39b06858dbb9d519b8b471e55d4ae5595fe27158a228bf400. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/RUA1D2476175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb88625aeede57dc44599240c045bfcc14e33bfe531745312e88a9ea5ee0c702. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/RUA1D2495275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c9c94f55c39e5c708ff07d7f00c5d2622787392c66f5cf5a5ec4cfc9a87435. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/RUAGT2406518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9b1e401648000a004f7e7d7430c12a452cd4a7b83d9a96a40d172ac40480cc. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/RUAGT2447338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b50dead960679633dfb819a417e5f74db2cd9bab433dd39190d72955f96a80. 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/RUAGT2476682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd671f124de4056203f534dbeb9909f8a0115cdcdbbed2ffc5a17b0fac363f3bf. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/RUAGV2410181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472191f6e32f6a55789a50050f1dea7aff9700fe9da5139c7004675e824b0b16. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/RUAGV2500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0178e7c332e909a1232ec902b36c339a045370487a68708fa9b5c29cb48ef10. 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/RUAGV2500540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd1d002db0f77bb6ed9ce5d6d8c32c143c1613ceafdacc70945fb3dec4d203c. 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/RUAGT2514126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa692267af4b16dfba2c4fa20ab36e207e3cf2d6fb3ad97d6c5297d0355f558. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/AEA3P2500385.