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 0xf6a4e012517286bc4e03c7fda0af66b797c3e5e4ef8bb8de40c6900cd46851b8. 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/c8cf5eac-1d08-4c1f-978e-2c50145685db.json and https://artists.proofprofile.net/proofs/artist/c8cf5eac-1d08-4c1f-978e-2c50145685db.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 0x5ac13ce60e64357b717d500cdf4cb691512c4947e8e5eee3699bbb441274de09. 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/TCACK1543787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80315f29d7fbe2a06b9f5ff06a57d05ae92046d5aa9ea668ababb4d9a7382622. 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/TCACK1543793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40761ed0af36e0d6d11985f254cf7a8ff66dfaac4e181f70f8f7f7b32e70726. 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/TCACK1543796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0697a0e3669252077eadc0f04830f6fa81441365c470e1adc1f5ea92e81974. 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/TCACK1543798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c91c4a9490469d1e13a108c680c8361eea76c72bb1b5733c610c2e71523f22. 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/TCACK1543800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56232b588f2b1649c3e85ad64870e4e470b64b45dce2d594bcf10d906681383f. 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/TCACK1543801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc0b00b35ec88fb26032f5a2897dee2de2deee19948d9ac7d3149e17b14fc46. 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/TCACK1543803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc178783a23f2ea0e1af646db6b202527efe839063a27bff8cf13b61fabea13. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCACK1543805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb997c157775bc99917a41e362f622dba4318ee027220b6414f5cb34cd507ac83. 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/TCACK1543807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca11df710ca8054cab58093d7af7dc3c5c5f679e56560011d6fec1a8ec356e08. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/TCACK1543810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8878132433efb56e4e125660ec4596e1ee7eff27abeeb02f1532440ce7841f9. 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/TCACK1543813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c9f4c9246ff2b1c4b52d1df1da4caed68ae8f00d6212b8ff9b9efafa1de418. 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/TCACK1543817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588299fdeb8599069d09328527a14950c18322e2c7bc0be7f6cd7e86778ab40f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/TCACP1601880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d5809606a3a8dfd1bfc1aca2408d2c1e35c0da399256618ad256432dd69101. 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/QZ5AB2041299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daf810f6b385b85e06293de2c1154a74cce65bf15971bb199bd9e552987b18b. 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/QZ5AB2041300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d59c410dcd87a28eed4cd42125519be3d56d499291b79d895492a8593c3a6fc. 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/QZ5AB2041301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0346c8c4a99ec8d01e1d8723c81ee338ae2a8c76f8fc5ae91f32eefd8395096. 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/QZ5AB1895545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c92fe634fade10d7272c124ea81ef5d6437c70ca95d2724ee1dae4bd121763e. 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/QZ5AB2041303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40d6f52b0c0f72967c6999d247b3f190b88169ac549ee67b2f9860bf92003f1. 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/QZ5AB2041304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212ef5e878f09eca0a9296e7a6813aa0a7b093bf6f9f6c0b4fbe5757492108f5. 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/QZ5AB2041305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752b529e42dd110adde0212ee809737254bc05883ad4c7528983cb8715aab77e. 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/QZ5AB2041306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf44c7338d2e701de163692dde8f01abec9bbfb4730af2cadffe45480870c837. 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/QZ5AB2041307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149474b54fadf552f7ff50a55d507e51c4580ef279b5e86c62c703b5f20000e0. 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/QZ5AB2041302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a820836c65d63d6a7b8950e168a01b704967315b77029cc99047ae4d8d008d. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/MXD782104671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe212c7dd61ad878fb9c4c023f9e1767ab8fe58283847a08bcd9d41b111536b8b. 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/MXD782201987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe212c7dd61ad878fb9c4c023f9e1767ab8fe58283847a08bcd9d41b111536b8b. 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/MXD782201987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbf85125be0cd79d502d86689d5fee35fe274082324341d29f47499e63bd1e8. 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/MXD782204032.