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 0x3c474be743d6e8621778baf12548f2bc1fd7a464621a0683ef11a6f1a723f62f. 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/0bc0591c-0409-44f8-bc9d-e47cf28ed363.json and https://artists.proofprofile.net/proofs/artist/0bc0591c-0409-44f8-bc9d-e47cf28ed363.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 0xccb816a5ac94039ce1b236824af4d11385def8fef29150a8b9ecf4a394707fe0. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/INS189611451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58837043db6d70f4d977e0c2bc32f9759500ed6de8069430ff05220497f4ac20. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/INS189812674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706589d548b9b9d5ba07599785d9bb9cbbb17976529988aeb5836aa8c7308b46. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/INS189812675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45410488be01adc8b88e1ea16821b82f590071f0b08236d973b23afaf99e361. 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/INS180033776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c2f6184a5478b5c82fbc805693830e013e6cd988b83e3b7e74bb33d1adffb2. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/INS180803379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111940fa5c72b089f429bf78e1735614a9a6ffc0e6430fb367be8ac10c396330. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/INA180900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218c132bae82f37c66530cd6359a5482a0967aaacf164a374d35a598a80b7db7. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/INA180900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7e7f930bc161f3293e85815ba6f526b4c1186d6b7438eb5a275b3df7edde22. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/INA180900113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddc896f65d4c68db6ac08cd38308f1dabc1835064bbc2284132d2f0395d3593a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/INA180900114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbb5c839bfa0f3c26731ee328993b240c56460f025ae94855cdcb0a0258c2de. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/INA180900115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2685740432f7ac01d0f210240552c6508dda980bc228461f4b1a84f43fd687. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/INA180900116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1175ab56f6f2c3c69aad501e295cecfaa0268743ce1a33aab62352fe21be2ee1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/INV351500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aae307f5c94cefd301aea0f1dc785a921ca180bfb134e9f9a3d749044b78ba6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/INV351500053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b64d69a046f241a00662841fe1afa2ef3311997dfd96fdaccb21206803e849. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/INV351500054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722e85597d3761a07ae2f6d62e6f4022c453947ce3ad9cfa30f85a7dfdc6b455. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/INV351500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08bbf66199118a38db5975dca07ba5d5e1e521c4b52b484f1453659ae2249a6a. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/INV351500056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb014f632b2014f9d3e320673bdd69b302624b57c3b6eeb7f99616c5803d542ad. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/INV351500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a9e6d5687e1bdd371ee3b0566f4a2777566e19b34d953ae22d00903ca708328. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/INB942455383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90eab010777c0eb5a8510a24bab8431b42b75f43bed3e63807f2fe8fbb4146d4. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAJE2582631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fda3fd03c0ac102531eb09aca9c5fe5fe8436c81ab821dbf5a5acbef6064473. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/INT102500206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f966c9f4b83f47c610fc70b14e4d3def09bccfad452798240fc8f581e5cab72. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/INV792511407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b57cc897bf3904097ef0ceaaf5df76844fe313c5c9ac240e31c1c05ffabcdf. 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/GBEBS0200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88218d5cca5f57fce7bdaf383d403d4f2dad49d20a9c65687a5eeeeccc56624e. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBEBS0200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a518f556494041180236f06f46b9ab02b7a0a52049b350f858e05bb586c544. 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/INS189732777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d52f4fb299c277d5a90d19f9c306e99915f2e2778c90846c6bbd5aeaca1ae5. 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/INS189732778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6282a79936e66ec49b2ffec90a5d77e27760d84b53ec58305a8cb2f29d42ecbe. 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/GBEBS0500194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f841ee851fdfdc22b3e9102a48c6684c3fe54a8d3498dc903551b50ecdc26a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBEBS0500195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8cf84fc8bafbe164b4409a5b9091d83787953045f73fed0a990c977cc6f3cf. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GB5RL0900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6754fb3c425cbfafd93270d88450474e294f2e6daa70eaabcb01d61f64072531. 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/GBEBS0800485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19e58eb52652413ef69e25d30bbc008fc55de2e0b28c674bf4e6f754bc3d001. 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/GBEBS0100003.