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 0xc51282ef10e902d728f25f910b8dd70793e289fe6a30ff7002cb851a7f75395c. 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/0342c70f-96b0-433c-8fcb-575a3e008023.json and https://artists.proofprofile.net/proofs/artist/0342c70f-96b0-433c-8fcb-575a3e008023.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 0xb8031362d10c2b3d9bad1a0a72f0f4e71d383e6eca5784a22dd6474e1d358d09. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:09:56Z), 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/FR59R1730924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb57fd71d5fadddb38895ba5eb5ca56698dcc3e06d371734a58bba6db7ed1848. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/FR59R1730927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d1fe752d304229c21c18fb333a8a2fe88d64d35bd33203ac29fc4ebf075418. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/FR59R1730928.
Hasta la Madre de Borrachos (La Nueva Nueva de Zirahuen Michoacán)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb327819d4b64783d61ce2f6d3ff3f7e234375e38e84c53f64b83b74e13cc4418. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/FR96X1729814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afccdaa2e8159c179e2980ab4f1b6d200605d49f698ae7533852b10823d1ef3. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:04:48Z), 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/FR96X1729821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb66bf16dea33c9a5b0df56d46f9356faf6c1c74e6f886b58c6340ce693c48d3. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/FR6V82618504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b64717ec2bef97afc948fe9c4e82fbc628a7be9f20869cce0af4859ecaab962. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR6V82618505.
De "Party" Con la Llano! (La Nueva Nueva de Zirahuen Michoacan)
Y Que Suene Fuerte la Tambora!! (La Nueva, Nueva, de Zirahuen Mich.)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb82ac32d93736255923606c6aa4cd4a957239ef27e92943ff4f5f92908d393. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FR10S1558803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2365b36465f200ca9ec6b88020a6c23a30e23931611bc85147a1ce04822158cc. 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/FR10S1558808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f459896e5cfd233425599b07f252161ccb70d9b8deebb78b199d4e62289214a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR59R1795514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a4026a6117f6979c982fed81476cb785c4b59170f9d40f3976998470fd8103. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR59R1795523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90847d8bd29782526a0960f9c241889f27f3178d99b7f7091982ec600481f4b7. 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/FR59R1795526.
Popurrí de Sones: La Caracola y La Canaria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3c3aa4357b456f4718ce864fb165f62e5c49c1967dd6f3b9eeff10b58389ab. 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/FR10S1702478.
Tu Falta de Querer (La Nueva Nueva de Zirahuen Michoacán)
De Campesino a Ilegal (La Nueva Nueva de Zirahuen Michoacan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ff4e52f3010bd0378574776dd6346e10859b6a2431d06e5498b0cd04745404d. 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/FRX201845337.
Señora Señora (La Nueva Nueva de Zirahuen, Mich.)