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 0xdb3452b19618fec38e393d70861321bb492130b9b3864cf19a30fa3d2cab373a. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27c5f3ba-057c-4223-9267-e0bba96ed1c5.json and https://artists.proofprofile.net/proofs/artist/27c5f3ba-057c-4223-9267-e0bba96ed1c5.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 0x8e917e466127f8c76b9760ed0d18037dc678fa92d0eadba51a5d41ac4f70507e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USPWN1300992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184df1efd3804b1ab5c2abac2cc4ae0d5febc53fc7a88786e594048a190d0c9a. 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/USPWN1300994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb428eb8269e9cd8d14ddfd42c175283bfdf356c1730345cca0ffa8b97c0d280a. 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/USPWN1300995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ecf584d22099549d6f50013dc2776f83999b388988b7408dda6230e96eae81. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USPWN1300998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa04079f56e1e5f03ac70b6375ce88084efd577d4c3aa47ab8d9f2cf89734bf81. Chain 2 (Bitcoin): anchored in block 957244 (2026-07-09T01:44:02Z), 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/USPWN1301002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aca01ed2d38efd7909ba20b1d17b915bd833d66c918d0da556974109bb0bcc3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USPWN1301009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c278bcf5c18c787d57d754f06da685d808102bd94b9ed9e788e88a08fb5eea6. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USPWN1300993.
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 0x39a6d1f4d67f6bcbffb6ab61469cd67f4fd89a8f4bbb7f6e2230c15640455aa3. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USPWN1300996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c377996dca542aa9351b9e38154ced01f01ef66292003927c38f0ddf67aafe3. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USPWN1300997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a582f5666c92fe02e924c56d97690c9cb536e2ad928b6f17c223282546e3871. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USPWN1300999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x391aaf38bd877f7a2b61697294f097a0f5ce2eff741cc669c9b0e3e7ea54a7c8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USPWN1301000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cbf01859ac202692b8df4fd865d12bb6a11ede6028ca65c277834ef5bb95e4. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USPWN1301003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8cb858e6bd213785873e9a232db23868a1a181360d3ef8cb0525a5dc6acdab. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USPWN1301005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6764bf4da8f32d5d183c1d5cc81dca94534ef17a306807375f0f157dc7747cc7. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USPWN1301008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef1aeb4b465da0e5bfc2ed9450fc5f535c55835b189cb74da55b5782b9606d0. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USPWN1301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae20ed76716d360ad23a13622379aafd321666b1fc76aa9da78578eb725a6705. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USPWN1301011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5461cc2ab594fc019809e35af66a18b5fc173399b6d4fd76c03dcd287b8a1caf. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USPWN1301012.
Mexican-American Border Music: An Introduction: Pioneer Recording Artists 1928-1958
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa3f4c00bb8c2003523bdb6f23600dab3d09ada4db10b33ef74d2931f63864d. 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/PL0B62370826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531e4dda05f3c7b0dceb74a05680da49e514f2c4c6c22936881183e16ac3aca5. 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/PL0B62370827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f449c24286c0688b88a6fbccd80ae0ffa140341b4322a503497ab2f0b5a917. 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/PL0B62370828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb08f1d3a27fac4ba215b0ae5a827bf3a71ed93782dddf9735e7b8a143352a62. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/PL0B62370824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff66462555f1352e8adf77455af6cb362207b6b7eef63081ad1966344193b5d4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PL0B62370831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffc750e940cb53799161e88322c442c5257b23857fe5632bee0fc038d3b958b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USA2P2123742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ecd9ecc0ec6cb78d4d13c2c11bd1f9dc1fd10139c119a192e1b1f50d6d953b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA2P2123748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3566bc59518fa0729a11a94f0938e13457daffd39c09aae06488350993ecdf2c. 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/USA2P2123745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3753394d1f2430d13718291033b454bdea3ff5878e428b447c4b2f21908456f5. 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/USA2P2123751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620eb7692a6445c36022a28365b208c096924641efdfd1053db5c99b340ff68d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:27:53Z), 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/USA2P2123743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe16c07a615a5257edd53e1b753bbabf4990c4a45c6130576a2d3179642badcf. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USA2P2123749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651e938fd2547e6c5ae900c22ca72a16c5f7a439e388ae74ecafa678c75ccd8f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USA2P2123750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcf77ff7ced43578af6ea3c0f480ca3ccba098b55b3db096fc1d22dce854ad0. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USA2P2123746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46a6d018932cdd869837892070b37df8a4dcaf0ca2c4139ec2b75e1ce4aa5c7. 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/USA2P2123741.
Tejano Roots: The Soulful Women Duets of South Texas