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 0x09ee30a3a97b8675cbb741ebac2b1a379d8d127561d9cd35cbcb2e5fe0fdd52a. 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/e3dc8d5d-5b78-4ff8-90d3-edcc0804fb0a.json and https://artists.proofprofile.net/proofs/artist/e3dc8d5d-5b78-4ff8-90d3-edcc0804fb0a.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 0x9196d433dc2ed54b80969f650d2316e8713a89d5104dff921f0e87746b5f4863. 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/QMBZ92439481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64580b5125a0e2f89a582987cae5ca7c47d388ec4ee501c3aa91ee9f7a0b597. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM7282414406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50e0e552c1af6be5558b3a11ecbff7af709e586c14ffa52a00038bdb19c659e. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QM6P42468779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef56b332d87a949a9bdb367df5ce149ca95d2daccd7b6c753d89d4cc5d898d7. 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/QMBZ92439498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964be6ddb6552d4649e155f15b9fd1c5b87f61e44a5cad1eb831bb836b9d1c35. 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/QMBZ92439505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9196d433dc2ed54b80969f650d2316e8713a89d5104dff921f0e87746b5f4863. 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/QMBZ92439481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64580b5125a0e2f89a582987cae5ca7c47d388ec4ee501c3aa91ee9f7a0b597. 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/QM7282414406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50e0e552c1af6be5558b3a11ecbff7af709e586c14ffa52a00038bdb19c659e. 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/QM6P42468779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223455fc8fc643cf5056e6230d3740393d03c0ebbbf8df4334691fb91bce1908. 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/QZTLA2412491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65508c027f7739d251f3e500d386c0eb37b66095b214c20e0f9f4cbba9fa632. 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/QZS7J2368474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be72b133858d31144be3dc7c2bb64998336cb96e16bfe3ffc9e271fa0e1398c. 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/QZSYP2325904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7de9c7c650cc363789166522a0cd85442d6d176abfdc489366f6cce6405221d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZW9K2277710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ecc95a1280fb4daf47a7980d78c4ad8475e27272c990f23a1faf8a481d3d38. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJZ2238309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x594e8b0e25b229412b7677c1413c934eed04ec9bd6d51a0c5cb5fbd7bf9a3b20. 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/US7VG2363097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17fb05c439dd73050dfddc63aa88f19ac7022970d9d6e46e87e4729240b4da0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZW9N2250092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17fb05c439dd73050dfddc63aa88f19ac7022970d9d6e46e87e4729240b4da0. 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/QZW9N2250092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7de9c7c650cc363789166522a0cd85442d6d176abfdc489366f6cce6405221d. 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/QZW9K2277710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ecc95a1280fb4daf47a7980d78c4ad8475e27272c990f23a1faf8a481d3d38. 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/QZNJZ2238309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63da34a3ed4923f12b134fe7ed787f36d2c52f04d6f805c2f0aba4c9299c3fc3. 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/UKUDB2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30657018d6663fe3e7ce0174e2017fac6d96e66f66e0230b3f409e3fc0246068. 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/UKUDB2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ae3ef28d5cb04fc9f2f0da959ff68e9ec57d08379cf5638110947bc0eccee8. 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/UKUDB2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f0734405e214e02ea8121fea9d1926c9f42b77bb05a8c8ddacb7da98a5e038. 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/GBKPL2029383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbe021217f73e6d58c626abaa9827370fbbeb367e9fffc27a855d8666fc89bc. 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/GBKPL2086928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b77d772516c1ce21f0638b615da7c22d15978aa7059c058085e6d9f9e16279. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBKPL2004146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98dd776908619ca1ac946a80d1b6cf56336b0afcf61257b8bd2bb948019226fd. 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/GBKPL2009470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d42b6828eec2cb41ef7666a5afec58fa5d28c88d279f9d484ffe8f1389da6f. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBKPL2096026.
Unknown but Somehow You'll Find Your Own Space
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3385b745ed2a1603790326ec4fe35f987ae6c2a43d440ce9320f439ff7da9298. 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/GBKPL2009471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb390e4f06172a0c70ced5c7a12977f726859dede6be0bc5a4ad294320f5195b8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBX721900568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ac1728710648d672a145fb0ceb766e9e4c8363651cc8dbdd7abb7dc2a94cdb. 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/GBKPL1960776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde2f8292255a08e8df221b9c797cee8c8161baf8e07b0a5c76b1b230538ab48. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBKPL1943106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010b063326af874bfcc5589847aaed1468d96acf6b9ed356c5425d49a93fd35b. 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/GBKPL1952313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57b1bcbd248d3eb4f12af140b8144844bcc24630750b7713cf44e6be6bf473b. 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/GBKPL1947710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283a8d0d0657a51395a780f616d8d137deb395a30efeaaddfae7dea188e4a986. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBKPL1955162.