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 0x6e772087617a09d39d9c51889a7c0087271e5159955646a2734ec25cfb8f6cb3. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/015fbf8f-eed2-4f30-b1df-ed673d071ccf.json and https://artists.proofprofile.net/proofs/artist/015fbf8f-eed2-4f30-b1df-ed673d071ccf.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 0x040868099a45038fb8eb4fc3d3ba658c2ae81543ab7cc781dcbf5433077b0e48. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHN72472509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6a36235e59a12e83c0be1afad80194dc7aeacd3bbb28efd7fa4a0b7aea646ba. 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/GX53U2463111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd9437812a059201e57f1c8959ae9e36bbec0c0bcb798578f8eeedb27232384. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GX53U2463085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c6ce263bda8c7cc8313371e2a05b32f1920d6d2dad3311ea85035b14b6d101. 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/GX53U2463094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366af1aa560e8826da13e28af384bc2a33ff1fdf7a9ed044a441f0aa3150aec5. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/GX53U2469249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1180d76b08b0627e9fe12bdc348369c221c8d5a2326b382939e225cf3d175660. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/GX53U2458288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09795307f704db50ac05d82b8948278c262e7da00443bd96842b057595dc2bef. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:07:56Z), 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/GX53U2463044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe710afc383cbc92d728ed4640062661fd6f28ee7085aa3d9679828055a79a8df. 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/GX53U2463097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afa8de8b448ab18cf17d31666eca833672a394c3cd69c5a246ac52fd1235990. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GX53U2463098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a5fd6676abd1dc9b3824d3535e96532f75f65b74d42c223bbb750f094639dc. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:33:32Z), 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/GX53U2498379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53654cea840bc50d40581edab33b88a40f2a4dd2bfdfe11124361408e72956d9. 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/GX53U2498377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d5b6cd31fd0b5f708db02ac88a3822554d5edcde0fe63ce32cfb044b736fa4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/GX53U2498378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8526542ec131519500581c5ccee2169b321792038dc25a40ce5a3de3bbeafa. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SE6HN2472621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c630b634b969528a2b781111cfde60f7c651c6a1e9497a4b038abc3de4b95cf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GXHG92572895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd511b7884e90b76b736f849bf66b63869cbe2772b0d4eeb334b2f1811d481aa. 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/QZZ7X2563205.