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 0x12de3c668786a73abe615c22963eeead5d9652be7315acaba07920a38ec5f800. 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/732b0025-0ec5-4eb4-9b7c-3ac757862f1d.json and https://artists.proofprofile.net/proofs/artist/732b0025-0ec5-4eb4-9b7c-3ac757862f1d.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 0xe72b7452a69210cbee55ddcce192404fa4f98ad86e4437fa24eceda459604778. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USZUP1014104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623ccc7958b305c0b2722a688332ac36a643aeef21090825de5fccb33782fbd7. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:05:57Z), 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/USZUP1014107.
A Mis Hermanos los Soldados - The Original DINA Recordings, 1991-2010 / Digitally Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd4f7e3eb238fae9b1b68a6172aa343a7fc33cce0d3552224b9586393132abd. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QM6MZ1504061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f220c5a48de4f48d99bca9f0339a04ab920cf8660d509cd3667b2f20374e150. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QM6MZ1504064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd113c888fab0289e9d2fc1756e83f5aaf730531668472c0492561fb93e8830. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USZUP1011611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1bd6f258cded0c8134c823768d07837a17cfb3bb0d5d58984c7c991ae4d46d. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QM6MZ1504047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe46dc68ef2072583c529b7a673a9a5f0270afa4dea4c9d47cc5a809921e4554. 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/USZUP1011627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d312fba2fe53d3435c630efcc85d0b5f50d94a7047d4724487c4e0e2e43e742. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USZUP1013384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a160b2f4d5efd399c44111099c13db7597b62f282f70839d79e8a072417fb0e. 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/USPWN1010126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e08510830bd8e5a739d38799993920513b3b49e15242673f1df7ed9ab61975. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:35:23Z), 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/USPWN1010134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bf9802815a1ed2d7bbbeb252844a9769e49fb394460f45dfcd1263fb572d59. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/USZUP1110833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb03f0f97720b7c628b82e4c26caee50eeb79fc065bb176d2839fb9c7dcddc2e. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USZUP1110836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc368a7de02228fa2d544e88f2433229b79719d35a6f8240013efbfc8a346e20d. 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/USZUP1110837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9cc5ead8d81f6f2d1c0a439ff754ff1ddaf4f8c8d6956e9522272f4098a89d. 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/USZUP1110840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ffc9eb3f693797923066c87baaf04d67a398c6d58fa874fabc49c37aeac0b48. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USZUP1110842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7f5f21d8433f1447aef028d37ccc772b5e3e58a90345985b988a96d298c601. 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/USZUP1201222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a5cad4cfdf39a8175f6b5a089b3d0bc8d757c27d18ea3fc74f19cd2fe32b1a. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:31:47Z), 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/USZUP1201223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd128c4fe06412a16d9c581d38d838ff7a92fcd687ab13224afeb11b9c077b757. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USZUP1201224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2001fbd407d54734674c9f430c01ad9425ff3b4c842d7ad98a8d51b6d4527f26. 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/USZUP1201225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d60f084c888d8e0ca37ab7e60718a74b1586551c46779643d13f25e7c10f39. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USZUP1201226.