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 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 0x491103610e199e9d5f0d5cece4f9582ff2d08c0806b35346833b92cde03a4c11. 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/6243d5b9-bd55-4cd2-a6d7-d8269267e71c.json and https://artists.proofprofile.net/proofs/artist/6243d5b9-bd55-4cd2-a6d7-d8269267e71c.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 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 0x353319b24c7a8797e22b571d11cabe534e8e6b8d8ca0af3ecb93a660b125c313. 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/ARTJL2300339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43e3228d34a83b700bc6bab37032fae30954b70720ee54ab499f249da235931. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/ARTJL2300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aff7d3ff00aee53def1835f0d0952e1b7ceede0985425c032b479ea6c86dbe2. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/ARTJL2300341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea98d0e9b0e6a529b7a3d1a1b0a5a41afa37a1045c74d5964a7056558aaed63. 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/ARTJL2300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038817806aa2f904fcb74cfefeed533ac5b3f8a37cd94ad2829afe5aad9fc107. 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/ARTJL2300343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9a8845c3d2c6cb98e35b932fa13bc304953e4e894a0ef01166194bf7073a45. 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/ARTJL2300344.
Homenaje al Mencho Argentino / El Cangy / La Caú
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513cad434eb4249cb04d303e4f6c9e72dd6a31588215679b38a391cc48c0566d. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/ARTJL2300345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e528e393771ef045246f63c1d3a8216ad1037f5f1a7b2c2bbf18774f96c1f32. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ARTJL2300347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b1e896d09707f294c44171c4fd6e7ad2a3ed031d59847fb7f2017011dd8dde. 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/ARTJL2300348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3a3bc0ae9cedb0464857df391ceaf0fcced0d7a58364c923712445adfce9b5. 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/ARTJL2300349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccab58e5e344efe7802e14aef2857a98a698c03e443ed6a1300e9ed1ff77ff23. 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/ARTJL2300351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d00fd9884ef5396de57d3572629468bbdeae566737d254f109b4ae9100ec33. 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/ARTJL2300352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7afd4d049417361289e423c6623075489490734929944ae6d6171083c13ea1. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/ARTJL2000203.
Mis Noches Sin Ti / Recuerdos de Ypacaraí
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b8dcfed2370760fb800dd4b9e7b47eae10b8c7e4cffcc92db37b6823ed0beb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/ARTJL2000232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b13d45be568865250a7da10a82cd55b50d15e92829668435980b4e4c9f54eed. 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/ARTJL2000238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8275aefcf4359cab7681b09f1e5af96eb0e6c2b78542f5029a1dfbaf8aff695e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USX9P2454478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd573c31ddb46dabef95e9507ca9a79e630c6b43ec43555759e50c83a5df0cdeb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USMH92300550.