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 0x6c28ea8b88733d76c1a3ccc678de38b00f5ea159a8e93b87729d5f96b78b342b. Chain 2 (Bitcoin): anchored in block 953762 (2026-06-15T08:21:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b8ca26b5-8aae-4870-b348-8f11d17db34d.json and https://artists.proofprofile.net/proofs/artist/b8ca26b5-8aae-4870-b348-8f11d17db34d.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 0x4a65c72f4f0247c5d398c93bf46e04357167453663f1de22677be40493ee1160. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/ES5060906201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7992e08bbca5fa29b406126ff2bf1482e7ddb9623a04052a91722d06282f85. 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/ES5060906202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd13f0ea5b40d58158eb4d090a51c77035be96aef83d8830eaf3c3a398fdc83. 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/ES5060906203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd1085ec1439edbf516ff4aaa1182b8f9c8ef3b04908510160c917d83ab6a1b. 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/ES5060906204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92033c9ddccfbb0a983c8754f5e01558553223c164a0539ac2ebac8ca5d73cdf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ES5060906205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219593abe999684ef434c4b7940c0c973753dc97157f94e6e475e81a39dccfe0. 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/ES5060906206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115b1544103cf13800a9376feebfcf889a4b0a08cbc69d5bd824599f7598600a. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/ES5060906207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710d995c328c69e58e42f7628ee5c548b7140b79880d97e460dce60d8579c076. 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/ES5060906208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785d203bdabd6b03baddbcb85e71b52c6bd33cb940c9e252178480ffe7ec015d. 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/ES5060906209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eedfa256b256dd62ea098bc97a41f03c0b5d11f54237b4b9ba3e29a8974ca68. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ES5060906210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e40cf5e127d25accad637f57621ee195160104e00d9c58d6ac94f03887f93f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5060906211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a0a34ec5bc397c13aa07bb7c24ed774057d25d5958208731d9f2df522f4e32. 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/ES5060906212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bff5a0ac64e41678d7a0ef766dcce067e2c07e226ba0ce73945886c5070e32. 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/ES5060906213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547777fad2f6ade5f2dc64d61bf1e6856333dc432dfdf5d33dbbe8e189cba486. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES5061110001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314321f28c7282d497a242ece2923d2d6017c49c7fc4ee6d42023694172a23a5. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/ES5061110002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4152300dc2d5bc14f8d515f40425cb9b35e72d9c730975c78c2408abf8978b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ES5061110003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d86c984214ee39f0440d618d95e7eab902210417a81acdbd2cb15cf4faeb99. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/ES5061110004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa939966c3d2c8c436b661b8ea9d14fed17b51a81232fba2c1d7f6dbfedb499a. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/ES5061110006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc947282c211a9094919fab3db39fde089a3fc6716165c83cfe387a3d7f201f5a. 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/ES5061110008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2ee847a4ff71b32069df99c3dc78df3b7c5f465d71a38b959a01237f7cdfa0. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/ES5061110013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eca3034a14531995ead5f5462c6bfe1ff8a1d3b72c6f00dde6b94f1fd16a1fb. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/ES5061110014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dff53f0fe993d639056b6913f6a9f8fb92575b76e05aa7ab7d90a4212882bf9. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USDY41809563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c6445306a3101b61017e0cdd2b91ae7742d5f1fc09404707afbc11f698372a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USDY41801110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f8107d7bec372e34de9979e4572b34c228f7501ec69bc9439b1cc50879051c. 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/USDY41801118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7240fd720cd5866682244bf8c4b99750a34529a70adc26788399bb8cbc229399. 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/USDY41801124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fbd4de1d53f31a9257b8411c16d73760c59ba95585402500c29b456d1651a8a. 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/USDY41801126.