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 0x69d78fc1cbf38cdd4eed2366604a42f86143317fae0ebfd68da10e8d4f4982db. 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/5a4d1b39-f9f9-49e0-92f9-cbdf80b3b267.json and https://artists.proofprofile.net/proofs/artist/5a4d1b39-f9f9-49e0-92f9-cbdf80b3b267.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 0x73e10d8b0d30bd3d1b631438fe7da4b1db6f02b33b351fb282c0fc26eeda7865. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:54:19Z), 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/QZNWU2553604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871525aedad9fadbd836bb698f4b5aeecc75eb61b399652c895470a339761401. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZNWU2553605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c54fa2e4f2ccfe6ba5d34262b7c5d25f832fa3ea1346e386f03aee138f06ea6. 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/QZNWU2553606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20385d3959ac04359c1bf46db987aa66837d47acc584c4dacd3e8916abe6d9de. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZNWU2553608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bff1c04ecc09e12828e5d65cf742f4d7c0c598e46d2210acf18e0714771d39. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:34Z), 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/QZNWU2553609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc065f22ee98366da1ee6b5d0539f4899ccdad768bb58bf163f00e02b9f0afd52. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNWU2553610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db64e59787af6609a23a33032f51af29564d4302aa682205cfc8d0679a22bf3. 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/QZNWU2553614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6719eda08d4f51ac7a669ffa22fc633bb3940eb570a8ef8c52ddcb4522d782. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZNWU2553616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba2d5829aa7211a3e2db3e3fac8d92120db9d2678a8604decfdd101284b724f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:20Z), 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/QZNWU2553617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aefbbbf555d60c221f9787a09cd022bf05374af86e33e9c227e29e378ba07f8. 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/QZNWU2553618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162247a0338995192c50d2f575d28d93bf1cf6385c9f0ed79ec4f381ae82f3ca. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:53:04Z), 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/QZNWU2553619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe489ee6c2c9feddf1dedcc90598bedc4e322981ca2facc99e6ba221de63438a5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:55:11Z), 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/QZNWU2553620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9989cef51fbe977fed5eef466486f2029ccf8d1a17dc6d16d984cc77d7679766. 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/QZNWU2553622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3d4a2086da0cdfe264be1eb418ce7575c42a7dc3530265f06fe0013edc73d4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWU2553623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c2f4eaf50e23132c0a9e12978c0dff899027a5a6f2348aa04f0b2ef6e13951. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTAY2546833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1835814368d1c25d80e356229b1067c613387bee369d72626c474d897994aa4b. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTAY2546834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129f83c0879c8b9e07f4bac8f48a211efc50878cb74da1c2d1240d0cdf82a50d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAY2546835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9e967114561cbea73325b4899b9865b463ca64d32a8288b196c2f5c0425a0e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTAY2546836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b30d3d5686f1cc2e3d06f04c23818630715fd064a4b4413ebfe464d979334b2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTAY2546837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cadd012fbaaf5d1996d6d3f46cbb925653e3b12a99df407a26e1e7647861b8. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:07:42Z), 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/QZZ7M2582190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3125a06623e9131c034cbbb5360bb3c51ef36caa5051932948620a9e4758e81a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7M2582191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112dabc5afb998a69cd40d74b44d20c3963ce5304f87ac4a08c368d754e82502. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZZ7M2582192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523337325061927abde2b47c4a7abb2b15a6df920a180633775c648b22493aa8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZZ7M2582193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ae46aa6a85a52de2f8f5ca2aa7b2c6c650c4a38169ac9158af18eb7e76edef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZ7M2582194.