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 0x13da4a5c16abb34d45febf6a53db142ab0154620ee129b82be1b54fd2a87fcbc. 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/c92d32b8-dbfe-4ff3-b9e8-14635349c693.json and https://artists.proofprofile.net/proofs/artist/c92d32b8-dbfe-4ff3-b9e8-14635349c693.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 0x09d5c0680e7f170a4ad08f92e4f9c3570e4ad1aa873227bc491e2b833386b024. 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/TCAFA2073879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bb2a20a8543f33090316c2dd730d81746f548d7431e8fa5ad606759d0cf86b. 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/FR3471695311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8611eeb353ba21bbf3654ebf234abb4af262c52bd125b1c5048350e44b413ec. 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/USJE62004007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4147f8a965d0728f04b1f8b8930b8ab877b9004940ea0ed01a9851be99d235f. 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/USWL12500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3b20c604beaf2f112c6fc330f26a318b61693ce5d9cbaa2ce7a77005aaa93b. 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/ZA34K2402643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f86468caa9a6f019318191ee9000fb82da3e879d2c13cb4be8b523592eba2c3. 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/USWL12403541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6778449b7a181138f0d0feeba5a53b0f7212861d11b046a5dcc7e2a5eff5ad. 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/USWL12402735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7811a39cab74269b4a04f69bef96f607fb8beb669fc5285ba7df89cd9b3f00d7. 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/USWL12401615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d58f325d744755993b017cdd673221e96342117098224dd371e210ee9295d16. 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/USWL12302221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17622e8e50d1b9b36ae72ccc9c12d61cc7e467b3bc743d89799457c68055f6e. 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/USWL12303196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb67c9b7a5eaef19ba826f0afac6770d20675cfb2442c010fc9962fcc066c262. 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/COC012235885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf1410edbacbab6554155235253efc8272e5705228d8496da21551a6390c64a. 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/USDXS2201230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8bd0681c64aedaf47dba2b9e56fa416083168e2d1012203f28ddc6b73455534. 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/USUM72202138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3495cb9922f6cf739b5465156cdc344e9a989eee648d7f681bf615ce3660234. 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/QZGLS2266530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d5a92e7c602ccd25f25b6dada4223cb16d68734f300600cc02b31fd79bf381. 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/QMDA62123274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038f219232861e0f28fd4338cdee9bf80d556845b659c0358d44398a7f982fa5. 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/QZHZ62136906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86abce4cf94c500afa020bddcdf965a5b26f4896692a5aa522fc3cba9541ec3. 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/QZHN62181418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f8fec37655ffdadce3f31ecd66ee85049d18584c480b5a6fa4df1d2c7a7335. 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/USLD91730412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517d9c25d128ecf78ddf5200e2b8ca47ff2e6a1e968e1d749cbf5df94daf5368. 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/USLD91729595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45da59167cca6a8c076c3aa99f870bcf67a444e930bbfd5797121e04efa0c764. 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/SE6I32065809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4ddc0b49860984ecf476550add48c580630fa6770be1bead66f1048779439d. 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/QT3EZ2426372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334af531704e17ebedb1413fe22a200a327063589d43215431bab7392e587c4d. 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/QT3EZ2426373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bf4c062630f5826aab6aa5b326184b4a027beb97912b34f6bf7369eb40842f. 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/QT3EZ2426374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853922a0d737df8773e7f9edb864fb376908dc93c7b793c757f52b17ad10dbbf. 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/QT3EZ2426375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0deb54431fa7507b3be1ef10626b9cadb3c014c481cc477b3793191293ecac. 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/USWL12303232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea5d4fef2d86b5b33254f29a0e0c1a1884b9a73a9b5504208205346f898be6f. 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/COC012034234.