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 0x91b2a945c2f45b84e8f4370cfe6776e24261792def5e7800ef884afbe523590a. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/124096a1-fefe-4006-b446-9d9e8d2bd3a4.json and https://artists.proofprofile.net/proofs/artist/124096a1-fefe-4006-b446-9d9e8d2bd3a4.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 0x292b99b830fed86667589d3f684b4c018156c67f969431fc740d8f0113e3995e. 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/NL1LE2302867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15da953545c1b6a9ca894848e3b51acfd4bce3ad5c194e7a7e14a90282c77b6. 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/NL1LE2302868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd70fd18384ad49f195587d89bad6ac6614f512fa5537bfdcf70902959607e3b. 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/NL1LE2302869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ce638746a78200cab33f9520f400d4db833e849c9d62fa65b5aad5ce320afa. 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/NL1LE2302888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ceb95986640b73dc9e8a9091277c1a0f935ea2afaad23d7d1a831412608f17a. 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/NL1LE2302892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf70ac6dd6ab836f8c474839532d1c13a288df873a74dcad475390e033d4f98b. 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/NL1LE2302889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71b6ab33dffe51a040fff950c331feecc34a46c011abad138e86ddebd9d9b99. 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/NL1LE2302874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9523823ece7cb9bb8a79f91cd8af59ae3b0f4ec7b27d35197fb4b0568070d9. 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/NL1LE2302893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a22ef084c848088ad0d8b56e5124e02f89a31bd0ef88063d2807fce728652a. 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/NL1LE2302873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8555c83d44209873a242b6efd5f33787f813a5fac7d7df20edc92da75707c00. 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/NL1LE2302872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf029f2e4cf4a99534b28d7102a410763acf87422b01c034464a8ba23227e5bb. 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/NL1LE2302875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286045a62b1123f03d421504d07e4b6fc09d6ceb63587c87c7c506373ce81b0d. 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/NL1LE2302895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02db876cc56c668a05bf254fc7e4a0ae00ac3141b7d8786f730877d6ee6e202. 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/NL1LE2302876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67add667b52c854f00a3af651e9e0b27c3e0ca6de8ed346658439691bf57e42. 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/NL1LE2302878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1caca550b790bf3e7777206d95cc9f3d8b206f132b3a97276acac0b2e80d99a8. 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/NL1LE2302879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa51cc37f7bbb77048732990a56147686d3b8af8294897fba9e1e3ed03213815a. 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/NL1LE2302877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6e61775953a4a27af1a9a6ca8ef008e83da77749028894a6c752c90032b088. 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/NL1LE2302881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4837d6d8fa87a338d15092ee1d07a9939dba0ba18edbf78f1f61e63c7c456ff. 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/NL1LE2302880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea1f56bcba8061c1bd5bf4dc9cafb20be75992db3654b7795414a7e326daa02. 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/NL1LE2302870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ed01fcd71fd0c18ee97169e35e4723ae3b4fc8c91270ad5580b3b8d50c712a. 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/NL1LE2302871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2514bda02435d3261341b6d432528bf32c72f0c6ef0c020018b74bcd2fdf7361. 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/NL1LE2302884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13bb4865e0276ea4bd516d05ecacc3ce30edb582a785f15fff55887dc8028057. 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/NL1LE2302882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb559b246b3f5fa732114a6227d07f2aec12c79aa2a195c9602992069f8f3e058. 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/NL1LE2302887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5203d0d598413e9f2b27e552dd8669fca2529b85dbbe43fab8620f2ccde76f5b. 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/NL1LE2302885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cd470e0ec20424dc1c1206c036e82f479e23ea9e5892e71fa94ae2db084d4e. 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/NL1LE2302886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fd36f4d565dfe2b4a6fe321dea221d30f3a230a441226fc4b57ba7dc02767d. 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/NL1LE2302890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f936f227154d7b055b6986c149b58067f08f14b8b237162dcea4fa569fadb8a. 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/NL1LE2302894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c5882c77a33c0ba582f6bde4346d2742c2563a21b88c402cd1f946f476a325. 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/NL1LE2302883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7334d2a67b0c5b558d5fbfbc1f10b2ca55091767dd66447b5a3bb6de74632a8b. 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/NL1LE2001477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c0f3b3f961190651277f6e54ec223c7ab34747c8ff24638b9fefb902f3ff25. 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/NL1LE2001478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e2033d47438bafd5b2d9ecc0431045c47ff667b98e0da705933b43ccf1e570. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NL1LE2001479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63d71ab2321746bdffa338dc997deeb22eb7051935bc0654ad34168b5a2db28. 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/NL1LE2001475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76a82c1f663942f42a998b1d6d6c840fced082ad7027a119733c24ce65a935d. 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/NL1LE2001481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3fa9c5813014a6662cfee764768604f5a4148647884d6b4d9020b6ac6114223. 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/NL1LE2001482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8025cbce8cbb339f177cb2ab1f8fb745eb57dcb0b0a7ef480c5c3a3254f80b42. 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/NL1LE2001483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317b5b556b7670ce0d7ab9ea84a1b66a0dc1089810f6e3f54c7cc7289f2adbcd. 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/NL1LE2001484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812c656bdff0475284e945ddbdc5233da5bba57720a23155cae70f7e43ed95f6. 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/NL1LE2001485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2483818e366e2607ba5a3e7b182c30e74662a899ed21ffb034aa0d523d2262ed. 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/NL1LE2001486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e7517e92cfda52eee52bb23275cb21734e30754810297b0e200522c9fe4cd2. 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/NL1LE2001487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3513bbe87116786bd2f7ddf89baca0a3ded5ad692c5bf5d7ee965ed9c6c49317. 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/NL1LE2001488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8b412dde73ade38bf96d1bf18a09cefe4c3b94e782beea3b1adaaf2c0b21a7. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USA2P2359238.