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 0xcdcf36f6e7acdc22afdf26f9aa593787ef400d1bfdab99ce13acccc7d9254501. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc3cc537-9fba-4383-a466-7b5474cc68c5.json and https://artists.proofprofile.net/proofs/artist/dc3cc537-9fba-4383-a466-7b5474cc68c5.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 0x4e7caa131c24232c7b0b45b005ebf8c20b25b02196e217d75a3bdf8eab98747c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/CZH441601180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00522792267814aaaee1dc350bf9002dae99d9f19810dc5d947258e2b605021a. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/CZH441601181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0535e014d5e764fc5cc3a2960913e4b7584d91028d7f3a56f2aa1886a02f32b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:51:31Z), 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/CZH441601193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1471e5288efa0b32731165427dfdbc58877d9e5cee3d3fec996ad1ca4de6cb21. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/CZH441601799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d3855e4501f27693863aeb16d76f149e21539fd87bc4f68d2c89c828a85cf9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CZH441800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bb486442b95b0775696c28ae0a73935a8dacb794942f8954079cb12b21888a. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:57:27Z), 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/CZH441800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5dea42c29e9c2af5dbbc66b40b9993ab78bc396dcae950dfa84961dc4977ad. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:34:54Z), 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/CZH441800157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5a8e10f69c4527ecfdba426f6ac474f20652f138510fd669042881bc043269. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/CZH441800158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da12ae042e037f38a5023b6d71f1abad94829c5ff2df0ec1fd54ea6247473b8. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:43:18Z), 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/CZH441800160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045a0c8755ca5097f3ba322fb210075383b43d14757dd28ee0a496e0b268b601. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:04:33Z), 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/CZH441800167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d262f2d25f4c830e69d0f9fec8295794c2c93529f390b0b686f94771a96e60. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CZH441800168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c9c3395358d0d6e8604ee2a3e021f5567b6f1efa4c0d6cad39e617b567de1f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/CZH441800169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347ac05e4beed9e2d0c9f0548b020ab128f2423ac97f65f39d3cf172164f55fe. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/CZH441900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001611db7fe214b25d78c333524acfd17c333d1b4f039a8672a8a457ad641fa5. 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/CZH441900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c26e38855b5b15636317ac5f084d964da6c9e8f26229fba2208dae14917183. 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/CZH442000060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71d7733d87ff6c537a000a048d888ee02bd47fc0a9375b7f1b6ef02e3b9a526. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:54:39Z), 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/CZH442100197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa361b458c0f025a18d9679596cfd182d1f36ab15dce1115118a771b55c46bb. 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/CZH442200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3458f85003b931938a9ca92c47423b2d9c2b905f2acb7943ea1c648a56f895. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:19:46Z), 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/CZH442200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53bc5807cea1ee628ab625a7fcddcca095872820718947efc9d55a6080d45b9. 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/CZH442300145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e654f5646e4c1145c76c71f8f0e66df396f21a721b616a499e25cda6ac5f0e0. 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/CZH442400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d340d22e9e39d8d82658175d216918d12573ca192005b33daebfda6d903e66e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:47:02Z), 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/CZH442400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb74d1815fccd91f9e4e9985ea919921e51df04e74e3721ff2026a27b50a448e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CZH442400183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087dc6dada62492278f40fe47d0c14c8d27ec9b3f3e989fb359e214fd0338e36. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CZH442500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcb465d1db6ae94b48230a07d884d3c1a1d907024eb10b76157dc803263c744. 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/CZH442500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf581f28635db9c27a448b62c2327fcbde8fbb7ceaf1632fc52e54058cffbfea8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CZA162200382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd12dd680ff95c3da6d48832e2f6c97ec31089eda44fabb99c8087f886f89163c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/CZA211000077.
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