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 0x5f4527eb44f799554abf2e68a0c2a9597783c4eec96fe22b2dd5dfd822a87807. 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/abce50d1-c331-498c-b894-9c062ebbd951.json and https://artists.proofprofile.net/proofs/artist/abce50d1-c331-498c-b894-9c062ebbd951.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 0xc972a69db76f660fc2683252aa503f4059b536dddff7d66b0121c0079a34fd0c. 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/DES232300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cba976e719ccfdd6e48d5277067ea4f866746e04690d5227a4821e13724a6ac. 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/DES232300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3529ed2e3112f226c4e70522df537791c51282dcfba2fa47ce3a067f806150. 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/BEIW12400292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3034f740ecee949febc8688185ce6579b91764418a6e5807d450ab8cd36fe74f. 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/NL8RL2404498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acabff770aa0f3150ecc9c1c575cc3e969622be05b52f9d3f3a6b894caa54a7. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLRD52302367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b49e07b37c9770b26de2298e80eb4b301580addc11035d014a4338e9af843fb. 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/GB6LY1600931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3206c4965d6c49090b372f3c12af8e4fbb93d06b2de2d08b5f54d577ab726b37. 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/GBCPZ2120440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7af4889a9fa4ba8db0576383392e49d6af933f669b67e850324b5b8a40ed1e1. 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/GBCPZ2120441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ed85cab5edf670287b795f275bc5e3192e131f46b96f94fca6094af5862c32. 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/NLZ542100235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8986b5ff8337435f620d6e397b3d4b7d105cfbb1c97b6460e060b1e1d31f3f7e. 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/GBCPZ2322379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb0bce5ab51009baa4867711dde18160ac67fd2d72d6652f9ca0ea6346f7fee. 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/ZZOPM2237433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acabff770aa0f3150ecc9c1c575cc3e969622be05b52f9d3f3a6b894caa54a7. 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/NLRD52302367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708874047e3d44e0d8dc57c72e4c093939080d6a6ad0474dc7da6c02ac1b4df4. 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/GBHAD2102600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccf124e2daa26d677160ae464d4da9407e3649a0f7cf8578936adb4a211b650. 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/GB5KW2104635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa777511aaa7bdeb7d16a914430f716d8d1491f7e43d595f628d31b1e2dd632a5. 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/GBEWA2103000.