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 0x5aa210b14c79bcd080326ab18d1491993f81913abe293d7e28dbc200a275decb. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53e5fb88-ba61-4229-82e3-0123716980e6.json and https://artists.proofprofile.net/proofs/artist/53e5fb88-ba61-4229-82e3-0123716980e6.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 0x49fdb97c0f0d3070e69bde46d05590060b1a1a0dbe392c3f12a2ab10e2311f74. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAT2144715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b23f7f212d6c31952b4cb9f3e4afd1b05a7a77343094b540c094f2e03f8048. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAT2144716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc374b79dfb849d42202f0bb1528b2d6d369348145c4e3d5e8d1d5a7df4f7c900. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAT2144717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83e2b23f493a556201f95655448ad6882ea3f21eb3ef58f88760f3b3f11578f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAT2144718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fff4841af35d5512aa917327fccf70db92225269a05b5598ed23d76b114108b. 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/QZTAT2144719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88926f83dcbe3d7d742e5bf5cc61d375035b54288d2b9de479076cbd2f84e8d0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTAT2144720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7cebcbfad6f9978c8a43c585f2230debbd3d1143e7cd4b5f5f00d81bd1640c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAT2144721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292736a85259f12d739a6f1dcc1935d802a1a147e241a6ed9dc129077cb36027. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAT2144722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed8b85e4fa1bc91c9f4f332dc7a80fe3428737c3346346bf1fc0aec81aedb33. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAT2144723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb140b64d7cf8cbea80648629c1ead2a270252048a8d6f0d647e931f7ab58d010. 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/QZTB62383426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dc1034ca5d0cf78112369c262e0bc61da7e38d259c4d1cbe97d80e2e47a98a. 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/QZTAT2154338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bddcc1cf433bacd5a675eaccdd2e5a30ba68cc6db2e2896832faf6a804fe04. 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/QZK6J2076143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07234b2df294fc46557242a1fa978c71e3b2cc4dc8fe23b5cd833395ab1e49b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZK6J2077802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3227814056183db3671b108d104bcac0857977b6a92451ca017cab64e1c11b8e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6J2082953.