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 0x770814425803c5ed95e8985ecf4026ff0d61211441c0fa1ad0a65e74ba9eae9f. 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/9cfc6b38-4218-4cd1-ad7b-3af8ab9ad7da.json and https://artists.proofprofile.net/proofs/artist/9cfc6b38-4218-4cd1-ad7b-3af8ab9ad7da.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 0x0c1436ed6a97441aec5d6e7e3e6c1064d16e61d905d0e0c9f085a4464946c167. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/ES7421600240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ecfa099baa2d44ef29ae188a673524e3bef98dd7cefe97a3ab87e755ddd6048. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES7421600255.
Popurrí - Corrido de Mazatlán / Me Estás Quemando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d09f9c333381523921e54d8a09a424857e3a16765c66ad371a3e696d390cdf6. 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/ES7421600258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab49d31331a81d24dae1a74c9f7402fa057e2fb4137f6a8c1d59e0841304e68. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:52:44Z), 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/ES7421600263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d6ae7735142d844ba77ed37225ccbdbc2f7c13d976ce853f2f81bc97a67c67. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T16:00:02Z), 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/ES7421600271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6273a6ec037d50cde0dec91f3f821feab84e7d519b8254868c2b0e556d97c40c. 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/ES7421600274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc02ccb3a3d34700262bd55059722bde714c606c51e236d8f103614c02d873a. 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/ES7421600298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ed7e1114598b07d4cab9e76dbb78dfc41212eadca779a281c52fbe07b42d58. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/ES7421600304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3031a3ddd66d2b99f56c9a9ec24d4783248356ca1a82cbb635fe789db7b0b784. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/ES7421600308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6638118a34441cb18736d8656a7eefb6985aeec07a2c28a51bb00c578f8ad448. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ES7421600309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f29f9b012c465446e02ae980024cca29a96fb3d703f4153c03a11de4c60d7f. 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/ES7421600277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5b9aec164174e957cf8fde3a4481d81c0c7e8fe0b1a4ecbc52ae2dd9c6101c. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/ES7421600279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc190c2c7fe4ef4d0066fd1961c3b437d495b991157eaca0580c9f8676f1b9c. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ES7421600281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f99abdbfb14d6b7895d63090cfa149bfa3d20ae19391f529bdfcfc23c04028d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ES7421600282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc4b93395e5800c3079506eabf6a09847e6e64be719e30dbab4bdc666fbe12ec. 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/ES7421600293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df52b6be4750d3aafe28169ffef96b296e99e82dd8507f07c463615eedfcc82. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES7421600295.