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 0x4ccc3f83a76824db4f9c236035fa78d5700606c1f6c2734aeb3bd7097f1208f7. 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/22dffe61-f783-4eae-9886-b66fb2f1f6cf.json and https://artists.proofprofile.net/proofs/artist/22dffe61-f783-4eae-9886-b66fb2f1f6cf.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 0xd49748b2da68ce99ff00dab8d88710cce81e854f0846166faeaa53da97dcd847. 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/ES71G1512030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d08090a2da782a30ad5c5d5e0c687bde3b8d9eaa1b3a8a0bd09e49274dda40. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G1512031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efcdd8ba79324d820d62b912030cb0b357cc5d281cb64830ddb98f725032f95. 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/ES71G1512032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aca1517b1a4f6b9cfd7185f75ad7eba9924b87107e55cf1e2ba2016f94fb13e. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES71G1512033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a22fbe01e711ab600b71745b7b22b46be5b062f52cc027cd8dde688929e65a. 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/ES71G1512034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dc63e8bce21f251d90df2c7609327e2ddbe2e1cc677eb558ac0b7b01399112. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/ES71G1512035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3143bd18ac785caf272b95260e8995e2edc87e1de263729a8e00881bd3ab58b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/ES71G1512036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c8e9bece6758044c04add4e0a448b76409abf48b0303682869dd9921dc42a3. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/ES71G1512037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb8b7d4c5b26bdb9623e0478e45c3de3a6d6d1bc046a492483e49b3bed65b4d. 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/ES71G1512038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1df34907cba469415af1c7c16549856ddd7d3d824ea97fb2c9b0b4007a15c3. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/ES71G1512039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea10f5f06a96ccdab11f691fbcee5f17028cb841756dd32a3901671fa5ab3c7. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ES71G1512040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0731e95c9ac7ff0189aac9c84260d498bcb1fa4b2c9b7cb545e648bee22b73. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G1512041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a84ded498cca7884d08743f8e20f40f67e957bb0e2d368cd60bb5c213463e6. 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/ES71G1512042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebef94316356583d43921b9ce813009732662f435a9bba4b0ad71edcf33097f. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ES71G1512043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfcb1caa8294457501472eb4c0464a8f665d2dc0e6821244e7265565db6dee7. 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/ES71G1512044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa461aca5f4861e5b572967dbffd63888a3fccc4a79c55dfd92d3d66b2897a13a. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/ES71G1512045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a904a288ef51d838bccb42e1d0a8935af71df99f685153524429622b6d5ac9. 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/ES71G1512046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdee9f466b7628d897d940d47a02e37e676defcf2df56ad05655b839379af4a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G1512047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b806c824f4abadaf1f7c3f14975c2053723c52750831cd55ff7bc6f1db6be7. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/ES71G1512048.
Cuando los Miraba y Parecía Que Nunca Iban a Crecer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336b3946f73d08f325c225a34655074e30e9639b24d0b820fe72baa7c0ca7cbd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES71G1512049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcb92317cc31aa440b820e77f9885a736b630d541b029ca4d35549e658f0276. 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/ES71G1512050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5474a09239cd795987e4fe62811a12b7172550c134d893a01a145bf251529394. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEUD91892690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebc73395862c2152f9f963b0f3a6c0083072813bb4c3e51ab2cd4ecb8b295de. 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/DEUD91892691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f126aa663be19e80379f332b65687f642f90624d911febc7fc5e5c47f87edab. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUD91892692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027c2614bddb30afbaecb1ef18f5500d551ad58c73eb6d67502e18c61e43a7d1. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/DEUD91892693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9c7a9119bd18ed707025f70afd7056700f76ad91c21254e8eba38160565fa3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEUD91892694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd7bfaee4ce0aeef7d7dfd934885d27cb38c756c07034abe151e47c0eed728d. 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/DEUD91892695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x702bf1c8f3e6310dd0044223f0c1e539c01f3617fd1938e9ae4370ebedb555e0. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEUD91892696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712fa7d9083d158706a01eda11b46dd418602c6e7661fd3b518b9114392d793b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEUD91892697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e631f8e53067c6898e03fd99ee2bdd42145b2d64e2c7405677798cabd26935. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEUD91892698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8ee85eb0dddeb94139d1f54c6404161e0a7d36cfde801b025583da27e7c827. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DEUD91892699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee082dbdf2567c11f555f1d47d0101fc4ee5c81057574392e454453225a3258. 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/DEUD91892700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6175b5f698366cc06c32e134cbb9523b787c53a3fad169e162d872e53199fab1. 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/DEUD91892701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2590b1bac051e7c30a0269cbf8c46cd3d0b04c6047942af7a48fc2f4b91a4b. 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/DEUD91892702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcad140a06975ef0ef17ca536f6bf845562e72c707037d49580be25b4d2e3af1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUD91892703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2a9f80bee4e7d9919ed945019b25676ee4da5af653b7838128d887c84a14aa. 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/DEUD91892704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f27d221e5f9abf977efc38e7fe44c3ad56b04d5be148aa14c3b3ee6637f29a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZGLM2200823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794a1a8c276a3f175f0ad573f130b2b9306caea171e1bc753cc248d3520a8fc3. 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/ES79A2017012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2a9f80bee4e7d9919ed945019b25676ee4da5af653b7838128d887c84a14aa. 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/DEUD91892704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949f532abf900613b9f9f1c45b962d4ca99fe59801d11dabe4acb9fce62ac57c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ESA011505040.