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 0x9f43a17d7b89aa6f3320eafc464ca7057396882a3295a52a9d485095fa21c337. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1dc96c6-a738-4414-91f5-f264a00ea100.json and https://artists.proofprofile.net/proofs/artist/e1dc96c6-a738-4414-91f5-f264a00ea100.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 0xf7bd4c7d495e07614ea890ceb92e35ae63ce35d7ec247a1b8f60314abb0d1ca1. 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/QM24S1822462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8c6adf4190808fd247f2b8ddf97be4809740d9df7df0a82296670d3d0da464. 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/QM24S1822463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa686b6f3cf94b3661bd7e15c6c5609ad72d362a4fa6845cedd1530f34b935fa5. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM24S1822464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4a5b78565e6c291a99019942712bf83e682c2b8f966cea7abd55acad1938a3. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QM24S1822468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c3ac4fd8b9e4d09655c5dba35e75d6bac10d92858426231ca9c22dd92f42f4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM24S1822473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4958f95131173907f64a5948a38632606475ca3520e52501ee2a701ed151f152. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM24S1822476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8bc80acfd44ee59f76133247c2db89aee611b5ee8344220988b5f9ea9d9cf3. 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/QM24S1822479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e38232d4ba9b38e43f7756776a06f55a49bebb5f70645eff8f80d710433c554. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QM24S1919890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b54e8f6567bc9a06cc69d1ae5225cf0e16df5b522ab55df9df22b8916f3a96f. 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/QM24S1832789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98e900a4d882e794f84283efc8bc8d07629a6ba5fb448e1c38d6b5baa45c26e. 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/QZFYX1945739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedcdfd4e03b5f436c6fb0975d51e3d505a1929be38ef14d94c2140bbc71f02f7. 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/QZFYX1945740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1abb086e1e21c03dfe05e300d71ed3a23955d83edf1f29c8b587a47b08e8899. 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/QZFYX1945741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e4fc149601a197d39d6044a8163a92e916deba0d26c76ec0a6e8f0b0eeec34. 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/QZFYX1945742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3a3cf7a65fa2490c27c09186bb799ea112e6fde7110bd9775746de0244d902. 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/QZFYX1945743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b2700d5ac26b3d96c4ae596b711b53d39d4b3896eddd80b4500fe30cb97bbd. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZFYX1945744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19442229d86bf760a926663b183c2c398192b2c8a2e1a285f354d0682564ca8e. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZFYX1945745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda176f59353526633d238491f2a11217c93b7c0f8f7e74f8f52cfe0b7d93eb45. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZFYX1945746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fc4b4d7728b076907f74caba1ec12994ce5ecd81d87c8c7e67c40f18ba5845. 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/QZFYX1945747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044ef82757b0db1a992e088c1f3d943697c25cdfdb5498ac7ca90a24e58f4883. 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/QZFYX1945748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf1a33a723e792f8fbd814be3ef419621915b0ade0a7f39b799acfc754e4e3a. 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/QZFYX1945749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7376f8812b06c5499cae23eed1c6f032341adcbf9be05036dcfa76b06572f4. 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/QZFYX1945750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee3ce7de0ec0f667e9ee14b6ec8b6fc8b3f25bb3304cd13b8f6052f37fc41976. 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/QZFYX1945751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346f43fb5ac86024fd58789d63f36292e8ec922205ca0c4455640f810648abd6. 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/QZFYX1945752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43716332b92fe1b42f90915a94859766175336a05a3ce20b1c8cd61b90b3a7f. 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/QZFYX1945753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a2b3aae151a67e456135aa70d59b612e986386c0d64892dd7d10b78e84833c. 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/QZFYX1945754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbea1c2907a8bfd56fa15e3c4b177f316e82fe7a372c49a54c45b213c9799813. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZFYX1945755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d2a955c00ca12701c144078b8c1a7c0d8b71dd0139570f4791faae7b4ea600. 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/QZFYX1945756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7c86009e89a0c4581ff80a2ad98bcca80d72348900856d5da9e3176fdd5e59. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZFYX1945757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c489fc13bdf4202669a5424589cb94b4500824bc8e8fdd2145138d65a652a3d. 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/QZFYX1945758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fabbed4d76ea47390fad12c9785b9a6ff07d902764e31f7b7e17a9fcf604971. 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/QZFYX1945759.