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 0xefd42dd807753b8a43208cde9e45f62ff513acd59591915a426ca9f310031a92. 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/04d956ee-8d0c-4681-bf87-f3addef59951.json and https://artists.proofprofile.net/proofs/artist/04d956ee-8d0c-4681-bf87-f3addef59951.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 0xfcdf35b2b174a6041363642e85eeb066f6e10284dd244b78834fbafe48083002. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZHZ52269018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7bf76b8571fca33d4f3423aac3c63c2d552a03fa8eb45b8c6f8dceeb98a5bf. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ52269019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3cdef1fcb441e87698cdd497763adc3f709cab1817f9f4e5e847f196aef719. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZHZ52269023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde306c6cabb8e3155d99114b2c4f67e21353503a647dd4786922a384bcfd2f4f. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:17:51Z), 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/QZHZ52269024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4032c1eec15af6c447094c66bc790dae0efb38e1c78accb4951c4aec05608b55. 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/QZNJX2215752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7283843f43ba4d8f8b8c89b69ec4bc14604b6b06a60620424354205efe36339. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZTVM2206919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904a16cf86c99c1931ceeca92dfd5d9a3d331dcd70441f64c463e41a7524fb8d. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZW9L2280145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe47862c0b1d6612aa4b37bf39dfaac76bf58f2bf83360361bacc537f822c75. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:04:34Z), 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/QZ5AB2334817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07d3ce9503a788d88090760f0e2d9d79aefceee87022838f0fc3c211e77a190f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZNJY2332588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e9fe97aae7e4965b893840025008b6138e05da027cfe9bb038e5c40f4713af. 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/QZ5AB2440371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3119dc3717ec65ca8074f5a9aeead3f5d8c8c17eefae5ddee9517f46d95f641. 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/QZ5AB2440373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbcc9a736e78823e23a80aa276f195e0c1e9946ab411e7b5714edfc856a3055. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZ5AB2405572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8109aa7849c0e89efbb423c70f492dee85b4c3f1e9f670a7f2633049ec3836. 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/QZNJV2414585.
Mix Sanjuanitos Bailables (Basura Seca/Rosita Mi Amor/Alma Herida)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e41ccb89373f98a9dc6354ffbc92ca8a3be36af93407ad9d47a1e21bf54c230. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZW9K2432845.
Mix Ritmo Amazónico (La Danza del Amor/El Suri/El Baile del Masato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcaf7cbe8f839404181cf4c1a4e268c567df71fd50e1e4dbee8c36a22ea8e64. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTVM2555646.