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 0x1980a1716f8b85fde2307777097bb6a79ea2ca9872d1d56dc6c06404c50d5ef0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2814d55-3586-4c2c-ba5f-ad759dd8a2cd.json and https://artists.proofprofile.net/proofs/artist/e2814d55-3586-4c2c-ba5f-ad759dd8a2cd.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 0xe2e5ed3fe08932cb15fc5a76d3b2704ba32d84c6387ff9f327513943f181cb20. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNJX2424888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd571d5756f2d597e2d28ca407b0c14f4d4b9d0aae286909239bb4d66379d5d. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:33:20Z), 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/QZNJX2424889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e77fff0fb45c4858f80f35ca817457fb89bd81ba80ce41392a84ff3a57ab561. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNJX2424898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c0c4203fbb87ff0e3f7276c6d6cbcaa270f2af825c5125d2e8c0252b307edf. 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/QZNJX2424902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9f4f267f0369329c69b49179387acaefdde65e594d80555e2c54b230780d7c. 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/QZNJY2575127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2465dd3b10d854ff12fe0fa084eebbe934201b46bd2d31bfb1c73bfa9fc23c2. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZNJY2575129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ecb456a263e9db90fbc0bfe1019e7fea2dc5f1a3fda78bd392fe54ad726fc1. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZNJY2575130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc052f29c507e5a89159e2fa2deefde4de3e3d45232398d9334a14822c51feb02. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:53:08Z), 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/QZNJY2575132.
Historias de Amor (El Poeta de la Canción)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05993ac103b3742dda889903b86aa5a19fa60279fef24136418cdf9861af5952. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/FR59R1758527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a975fff4e48a15fc46138374cfb3abc5c54f43faf8e3118935d178e7e3e99f. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:05:21Z), 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/FR59R1758528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc11205a1f455839ad01619f840e1a5f16d79830b795b63032befe1e7fee8373. 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/FR59R1758532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3406dbbcdcbf90e7d1cc8e0e3e900fbb0c48c60c150eb23b593fef97308d62. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/FR59R1758536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ef28c2c3b2e47ffa13a622770f75545950d514b1bcd75085457890fd5ec884. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:48Z), 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/QZNJW2481628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf2080c1f80f3e5d671e517ee1301c524b99ea52fd62fa84f387a6a7eb847b81. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZW9K2329605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0cd80f4be3244dfaf6f9c94389e6108f11f95e2ac463ab1d1423e2142b3e4d6. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZW9K2325982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0736b8eb09d378f6ab62f4608759631124f8f6fbd86213e33da243fbc7248e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZW9K2329578.