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 0x3d5a2b9759cf7921e49603f3eda4b7b964fb1b9b410e04425bbc6f6a8a512789. 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/83d7f9b5-000f-4fad-851a-7d9a1f381305.json and https://artists.proofprofile.net/proofs/artist/83d7f9b5-000f-4fad-851a-7d9a1f381305.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 0x9415a1f44ea2dbcfddc9a436cacd108e0f6880c830832fc0119f6f3b66bbbe88. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/FR59R1932546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1746e504e315c3dfd9ca65cac3f36c7e1f372ea9d8ab1233c70360277f2f2701. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR59R1932549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd41d093a582dc1dce3cd10f48daa5978fe9226d8302d8f6401dd992f8e2c0c3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR59R1932350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1682e459a4d03ccdb1be4c0857804862fc460f882acdd44ee89904f1e9220c. 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/FR59R1932537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b837532440c77f50b7e822e2863e4dcbf893b8c11b69916930290aaaef7655f. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/FR59R1932539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b5440671adf3094f5602bcf767857f01f8b8723c551ed284e38f65eb0ae79b. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/TCADE1717870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf714a653f1cfd5e5cf77dccd06e0bfecbb118eea4fee0b0dc6280bf10cdadc70. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCADE1717972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6a9768092387e08e866cfb2486d90afcbbbd0e6777da4f5e29697192fa3857. 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/TCADE1717974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa796413d8cae85466f4962a7a5e07b0afeea20ddbd84f72257400ff01aa1460a. 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/TCADE1717976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fded3ab3b8e0b4ef790a1d6c67386132b0716816f0c437e082bd2960956c50. 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/DGA0Q2384954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf856c442b2b00c95263a6590768ced225bd23dc778b7bb36b0b4277f36d9b3bf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DGA0Q2384955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d057dba3013b91babe0ce4d46d033fdac77e5dc9b90c4215fb94d1702bef8c7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRX282439888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f01714a48f7b64cf6db4c2c412744ce2aee00d70ba363440cd4dfdfbb78c93a. 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/FRX282439889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee17c8b5362dcba3e3fd65f5c5c1744fb1d6c3bbd2c866861d973c5c1aaf76bd. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRX282439890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9cea4ee9206854e230799a247a2fca9da093a210b3ccee6bab83460daf14b7. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/FRX282439891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c56d5b8f01f2cd0467b845f85835ec5f39335a1b8ab9438c3865335d1dabb7. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/FRX282439893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb95d36aa0c572d583ca27fc766a9d28c2c4e20e0663699e01cd5f2c3905fae1. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/FRX282439894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c65fd1231598a02da90e16437ce1894071acc132f3fe03fe62f97863db1710. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DGA092473248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f1a4a2afe7813e89ec91792c9acb18208111fb5fad4fd69039433b47f12e9f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR2X42532472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f1978265e2d29c469bdfdfd77999939923df1687efe3e8c2371233648778c4. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/FR2X42532473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fdf75fb787af0044e3ee9a739c0acaf8a5b0aa062ad4f5302022494aa17f96. 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/FR2X42532474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908dccbfc3d3136d57071a494097ecf9ba97c87b609047fd13cc276e9bad4d9b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FR2X42532476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce094f051667b51443f51c4e35bebc7a963233ebec31e8224fcb8a05c87e1b64. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR2X42532477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3042abacb3049799949fb0f2ef8741a040619534d44483e0517353369966fafb. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/FR2X42532478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a67d6166413990e73ba386f6d68ce7842a9a7fdcc95304b7b40da7fd0149637. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/FR2X42532479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa36d0e0fdbb518ef902ae581576d28e5b8814e9f6304522dc0cb299e0087c0b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR2X42532480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bb274621a4f6c5fafbc186d72703022d7fdcbbab502c429fc86357fd0b3031. 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/FR2X42532481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe691f00284f1e9c41d1f895eba7630f782bdb7e45f8235d2cca9a2892a8a9ce5. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR2X42532482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832e0947ca6659abc680dee0600b5509e51ac5125e1fdb668f73da5778d929d9. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/FR2X42532483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043163d36033c9f527eb2fe7bc3b005ef960bea2d2b7b47eebbbd48de3eb71cd. 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/TCAEC1903007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20cf9d86fd651a20f3ce53fc02834820f2b4a74b112941d92f1283b46a82a36. 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/RUB731417869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cacfe5a5624dc04d8c217d4d5826c892148ab130ca87247bdc8e865f0468a0. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/TCADE1717964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a98ba14faf05a781babab3527bf4d5a3603b24d1ad5bf9e8a916ee74d0f1571. 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/FR59R1795924.