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 0x904b4bf63dd77de33df7231227cdbf8785abe08a6002e263dd1c0a1d3856e8d4. 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/7f4e512e-1d1c-4593-824e-752f359d8bbf.json and https://artists.proofprofile.net/proofs/artist/7f4e512e-1d1c-4593-824e-752f359d8bbf.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 0x99e93fa2b80cf332971c99a1249f40ad6b837a4dcf972f6eb15c8d99ae32bbcc. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DELJ81922204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbe149aa0207963adccfe73fc30333eb839f2aa2f6db294fa0673893fa01afe. 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/DEQ022291583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4664cbef26b7648376f27fbac5784a241b4230ef187f7a09ba97fcf469c945bf. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:17:00Z), 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/DEQ022291571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c66c6800bf2fa2b87e71ad4317bef0cefaff18e6fa6d6842439dee090333e67. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:11:58Z), 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/DEQ022291572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3787fc048183195e836bd5aeeaac11cc7acdc1381b2c12f5443dbd6d63578f3e. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:23:58Z), 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/DEQ022291573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb4d594e738ff8df2d8b610ef64dd8a5dfd59d95dc5f13585ecd0df25c558ff. 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/DEQ022291574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46599d27f88937b5b5794b731fe6d1b298c532459cef12dee179acff8f9f4cf. 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/DEQ022291575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f2aff6c8eff3ff8dc6503e6a8e24887ad6fc6bb664df0a946a2c2ae4902b5c. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:47:19Z), 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/DEQ022291576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3fcf460ddb1b3505c2633b7e1ab0cb931ff24dfb012349391ff35f3ad193e8. 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/DEQ022291577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7a33cf19c30d8e83d3abf01128908c7efef2eb4f275efb155c40733415793a. 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/DEQ022291578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246b804b31fef5cad30b76deadecf9b6964cfc0a10b67a191a2734bc3cefe3ca. 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/DEQ022291579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10730e256f4213c34fc937c80e3ba5c8fb53ad4c853857ff19833ebb3d74881. 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/DEQ022291580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23e14124135cdf56d22922153d38f790a68369c7a9b0588bededbac1aa94bea. 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/DEQ022291581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2184c227a5f3d4cbb1cf02a1d5a2f410081d95526a1603658d3c134343a1e4. 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/DEQ022291582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbe149aa0207963adccfe73fc30333eb839f2aa2f6db294fa0673893fa01afe. 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/DEQ022291583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028dc489bbca8178b24cba65fdea2dc96d71c983fb259d6923821680181108ee. 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/DEQ022291584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d9eb2bffbee9965d121739b8b507c1b812606352f93141ee9b000ba96c6636. 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/FR2X42453207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf567a6abf5ffe53e1badac2529d14600808e14abab4b363847ddfd1efdd65e. 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/FR2X42453208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a8fe77ae17f846a90ce67cda415298601c427734a14763090c25bb464eab87. 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/FR2X42453209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e7e796419388e033d8c58feed681b949b2cd50d4c93857e210d9d84c7f6db8. 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/FR2X42453210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca24291cfa4d1db6526d06918e477d05c1c0ca685839a9ab410fdbe6e2d6727f. 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/FR2X42453212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4754dfe142c7e16f9a87916eeeab3e21b3723481ce224e5af01dc9561ede624. 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/FR2X42453213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5f3859a24d8633e01d475082d32cded916a44b1fc172274e14e3110cce4887. 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/FR2X42453215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275cdbb40abecd08a97b7ec5413f57cdb9bb6fe9751a330cd4405d2010a6e132. 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/FR2X42453220.