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 0x2c21be4532b673da56e728c077f32466460ec6de5a4698c03a60f8d0d33d46b0. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d267bada-7f32-405a-a390-f1975c3f31f5.json and https://artists.proofprofile.net/proofs/artist/d267bada-7f32-405a-a390-f1975c3f31f5.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 0xb18d870716aa14aee0654af3161c60544c537be35b4be27100b46fb0491275db. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/DEZN82502408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13f1829f9561bc255c1cdfd1bb00e17c7770ab91318fbd6b7716127be8a2636. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/DEZN82502420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcad63f7e538ef04828d222ed3ebf7d976475bd9efb904835a938bfdbcc9601b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEZN82502429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc69e7a0d544b020bad06411ac096d221ac476315026e28c8af439a5d6554c7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/DEZN82502428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599e632f1d8f6d401e37cc5b7cc46971e189e7ce87a353711de141a5c7edaf03. 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/DEZN82502427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3e05dfb4f8d00d35caadcab9b378613b9f8edb6a2906832d97b389ea6d5783. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/DEZN82502425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f414c3b2b8b28cff7d8d6237fb20480efe0d492b5b40c566d7b71a8f75d903. 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/DEZN82502424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d478379fc1a74c9887b54c321e50e5b41168d7e9c9ff7730b3b375b1b91e61. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/DEZN82502423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ae9cf3f415c1b1a64302738a2aec0684177d9e0c083508068963f3f77f33ae. 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/DEZN82502422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a5041f7e3c9c9b32d4adfad7178ddc5adc32e31878dca2df6b268b7ff14ce3. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/DEZN82502421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936e8fac96bfcb4c5363eaab8cfe8d5defb2c1b8868cea2cd82148ec6e747df1. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEZN82502419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60048e0fac619685f60a10c899e1aab92ebf35ca1fe5862f5426d67a14d3624. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEZN82502418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefda55ee7c02105f79d14b3f64f91c66fefdbeecb2c111bddfa73306bc3b4ca. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEZN82502417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c6b5859154d604a961949308fd52cccb0e28b694f0710521284b92588ccf02. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEZN82502414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c48b90c5ccfaa354f5c09851d35e5209eab3e56f8cee2562a69d2c33e2e0b1. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DEZN82502412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98abbd43edf88db2d6bae2fbb51b0b65980e853e713bba445d99e1e809271d6f. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/DEZN82502411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e6e4139c9a2f4980d8f77c76113930e4104850e1d36a87b247b7eea7d6986e. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DEZN82502410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ba07807e6888d4def981f1bcd4fd0441020f4b82fbc437de2c52571d4d3276. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEZN82502409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068932530f40cd78231b3f1ef0f7355636c9279ebe402eb73f9cf9fe6b8b2ebf. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/DEZN82503002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73bda0dde0973169fa72916de0a7e896ca5952c11c64386e7bb62a5d3d794f08. 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/DEZN82502999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e1f91b17d2f6e6fb7a2c95775ff4f69c5a59238e0c7f10752eaef90d7843d7. 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/DEZN82502998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab603bd4df98ea97d3ed5af053f7c85c811529afb6a62efc8c487ac9c367ca5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZN82502997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b98504531b5e1b1c21b3c56470b604ec888375f39c9819e55221d4b3fd2a25. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/DEZN82502996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b93e2afb58a4928ce362a8d2a619b776da349c7e6ea1540fe337c15e0981b9. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEZN82502995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd035a40ff8a5dc6c9ad206b28b420ff5df7420a8ca2238de37b3922f0580806b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZN82502994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631931af50b655407955b903e645150316b966dbad5854bd3e7517d293cd2c10. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZN82503001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076c45314e57c9b8e12e6eeb63ff47d603d138d031d327e21662f938b80d30a5. 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/DEZN82503000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48420eafae269db4bfe41a6f3902f2565c233349bd38680458a2f2ed05652a18. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DEZN82503039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8a34fcb3b014ceec53cf4d18d54960ed97450b1270762d5bc3633f20acb49ab. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEZN82503038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9391c24675ed639970435977d1494494d39864df0352a60a25484eabdead505. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEZN82503036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5cd9c1cd74c35a30fb96962d1b9b88189a6a6835474cafaa31a4eae47c327d. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/DEZN82503035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe562544a7096b3bedd00ddc9282772e7642eb9f1becb4d62d3b3aa4c0558aa. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEZN82503007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a6ecdabd5549e03945d6908e53d8e9d185f55ec80ba9937fada1d6ee404a03. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DEZN82503006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e7ade0f104e00bd2f03244a5f5a2884591054ca77c144dc2ced93025fe88c8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DEZN82503005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56fba167229ce0c1e0fd42c903d3ade6a3ece99a04ee303a584f4ab39520a71. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/DEZN82503004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcba31516a2e993c4369e16fd218ab5f760f7a0b2214dce26a988027ee0ec0c8. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEZN82503003.