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 0x85509ac3f1ac581503172c230830a7fa282a257cbe9dad2eb887f1ea4cf3ffc9. 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/45f6ae9c-2bf9-414e-8e49-5000f16465be.json and https://artists.proofprofile.net/proofs/artist/45f6ae9c-2bf9-414e-8e49-5000f16465be.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 0x330733bf4c22cea15b77b5734ffc643404d668343b2ff834599178206bc25120. 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/QZDA82139607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda007dc96c830ece22240af6821cf391ab9f91238501054c6125a555406b9ad. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHNB2172262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3942ae798735c83cedc390c4dd7610f102ce1bcd6a72295127e91333faba0763. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZHNB2172265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e8c28813c0425febacc2fc33fa6f72860d9060f61c2668a2d689c98be8b296. 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/QZK6H2196802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216710b7dec5594b406fb8a066508bfd63fff3776fddb016a6e099e0897d7715. 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/QZK6G2149395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8522fc8bf30ef0d2ac7b0e89ddac6d4dd4e606c4938a3f7b1fcb58d9541fbd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZMEM2153436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dede6cd1e1e21a947077d39adbe43cad4d7e151bfbd734ea3686f22ef5a2e4. 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/QZFYX2260578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0575f8cf0958755c339256d4c7392ef47c517de96ecb4f2e1334fa4a55bdf769. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHN82299811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da45b2c0681e383c61c2302d260e821232697f7bb34f3586d89e3118b2348c7. 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/QZHN82299812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa3909934bba0b2ab070d42e1671f537b4cdf61127bf5cc589fc46569797e15. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZHN82299814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d51d05637ee846fb771efbac75c2792e566f33c1265e57473322f0129b1e806. 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/QZHN82299815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d86f4eb745a6540bd47e789fb410f244696b42f95568cfb54a81cab0cb7f76. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/QZHN82299818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e58adb55fa14bbe2a0c75a869442c41235526e79ca6f6e763697791e7ee7e7. 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/QZHN82299819.
Solo le pido a Dios (Ukelele Session #1)
Solo le pido a Dios - Ukelele Session #1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd7657e56bc09ae8e8cd580f494b60a158b0f8aa83bac3bbdbcbff2cae441f4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/USA2P2361658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80de7f4ef952d5db78ca35c056c65976607cf00783016567b331ca5b9b11ce6c. 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/GBMJG2406678.