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 0x233de8412b4930649a238c5058cf8dea4487ea3242410d6118a7799ab42cb740. 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/827fb9ee-5b8e-463d-a48c-53a631cc9a5f.json and https://artists.proofprofile.net/proofs/artist/827fb9ee-5b8e-463d-a48c-53a631cc9a5f.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 0x0f17d99953120f0121652843b4f74e9f9cc7a47cebb416b95a915d41c3d71716. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:16:59Z), 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/USX9P1356424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c5723ead82705daed8ecadf1dfb0a213b34f34925789ab778b6391cf55e7c4. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USX9P1356425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efd1566b5d45439494687f223bfb02d573cfdb2c96dc9e765da9fa2efbe7c5e. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USCGJ1625626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc58fb530bb21397fd651f1609a54d3b68cae9ef483418cdf743a47609d1819e. 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/USCGJ1625627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f375d07ecd3767d90cf64feb78fa463fd403a1eabd06a1c5393af8c4678fe8. 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/USCGJ1625629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b924ff8948b96aab98ba464b27c9d479045380065c74f2e8f360b6a7b82d94f. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:35:25Z), 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/USCGJ1625631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5eb5350fa1d4bafdf712eb54339ab5452afaa6a1c30d91e7c90f4575b1c74b. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:47:17Z), 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/USCGJ1625635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4ef534b51b82635c199ec76842d1d43f5562da05c8cb8d98d02d3a5a0d4872. 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/USHM91874867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524d8eaab7e24a221dd630e9fc9d97e05cc276cf0ffbac98cb03efd312a4a707. 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/USL4Q1770727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce6b47f9fb768a2d187da9b4488093ff66ec3114a7655b53dfab87af3cd86fa. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:52:05Z), 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/USHM91874868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a627b1033ed4f0d24860684a530294b4c2f540e7365926f0aa807bbb28f5990. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USHM91874869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2d67dca41124a198473c5132f7a9bbaf7a929328e1553ad03ac8def3a4b4c1. 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/USHM81888458.
El Blues del Diablo y la Enfermedad (Bonus Track)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfead077fea35174f1382f78c0e6e5811a95d6a31e9526846dacab08ca79eab36. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:00:15Z), 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/USHM91874871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccda37bf677f4a225ee3c1513ff25df13d5fe9d962eccf3499d0eca6c35898c7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:25:00Z), 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/USL4Q2067407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce9fb6900cd2a2fcb5d5df375cf0edd93dfd7b89520a826f6b78a25dd10f32e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USL4R2317778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a48036f01fc74eaf93d78519f0979761652e1249a781093f1f2134a0875c97. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:39Z), 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/QZZ8B2503093.