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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e7b5d256108c22dfc777dea5c0af8596a21e735f24c417a1ec89baa1457883. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1de35564-bbdf-451b-accf-3e7c133e3697.json and https://artists.proofprofile.net/proofs/artist/1de35564-bbdf-451b-accf-3e7c133e3697.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099cd6bc0c3ab518d24abf3c7a2a320d24b402c26ff657c14f9d987f9fc2c395. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DKBW41600101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b3ce41118e7c8871f252657e9eb27295bd65a7b852e181c11730dbaf478a78. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:17:09Z), 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/DKBW41600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda8e024926d4287d467720f003612921001b2090fa4effbbb438ba466206c2b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FRX872592589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6123499add6cd335ee2cde1795b00a579adb750855f478bd1ae85b0cda2e9b. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FRX872592593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8a987ba3bedb2fd9c87de4dcc4c1d7fe28d9f22c4bd5285d83c66a60990006. 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/DKQP51600501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89e16b68ce5b2bac8788cd46f8df8fe763da6c5ebd83a44ba0c41849581ab77. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKZK52100611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02110a917202023440f9393becfb88851ba2198df00ed65ed6c598e5205e67eb. 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/DKZK52100612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c8d1b023fd87a9f03364a1e31ac8dbac4bf79c1a9927430850e7ce76700a5d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKZK52100613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84e2551d246c288811483507a4356c242cf64989cb2e66a2fb9235aea646945. 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/DKZK52100614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30619a5b7dfae69c826cc094207efbb4ee4bfa5021a80ff5ebe984c0653ac332. 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/DKZK52100615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0b473f2e0efdff8f37ac425bb69f0763caed92facafa416b55b225b96d292c. 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/DKZK52100616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9bc020d31b7bd0b14b1c62d99175a1fdfcb01f1e23eb8d1b4108859d99a40e8. 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/DKZK52100617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abee5ca923cb374e4e3e7faf878e35e4b2c22ecd425f9bb34803cc2c33a9c50. 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/DKZK52100618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaf5f6b0ecac5e8fb11cde42fff3f0f672a760b4f99049d2b48c618ec462371. 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/DKZK52100619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8da18f7ff181a4fc0b63d3054d74e3a324e32069cce46998ab48afd88ae491. 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/DKZK52100620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2969c63c62d0d97ca6cd9379f3421a7b8cef3fcf401f73d6c0bc715a515a43d9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DKZK52100621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd92a377cf42b3c23917d438685239e8891a2ef34992927c76c74cfc28ec8c9f. 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/DKZK52100601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717595f26644fdeb74683dd6a3e30fdea44b7a80442c55b3251be651b1b9904e. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ISV982012901.
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