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 0x3981fb37f38acf600b309451efdc4d4276cf57e51a9b77a836dd4c87d37caa1e. 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/7a20da94-18ad-4b4c-8d06-8f506d9b351c.json and https://artists.proofprofile.net/proofs/artist/7a20da94-18ad-4b4c-8d06-8f506d9b351c.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 0xd63297ee8bc918314bb776c41705a5752b85131bc60ebd38be793a99b0ef4d23. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZFZ72115703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe035907171bcd8b09f319b5d987e3e7fa862bbf3c1011f61bbeb10e9529e55. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ72117095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc091c43868ee9dcf70e68a8ecac4147c61cf953470f80a940ddabddf2772cf3d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NO6FI2307030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0418f86211fdf818bbd2945a2252115146a1cf5404f5e622144ed271ea6b59e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/NO6FI2307040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9d3f575ee1973bd92a3f949a70703f37c31c00b4708d2b781e1c6e5c00ba0a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NO6FI2307050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d03f09846e9508380c8c2b6a968e97ea7a8c59551d80dc3f16a041b95520ab5. 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/NO6FI2307060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cb7e788c6bd583b9af4f559549e16e27bef93446247e30733ca48a379b9293. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NO6FI2307080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24850952f3c4ea970b7db4b62a4bbd1d4a27d9471cd9b75f7e8475b7965f7a8e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:13:16Z), 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/NO6FI2307090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fbec96074904cb06eb45b20ab3dc5b8381374e1dcaf0e01e7c972a4f7b88b1. 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/QZWFG2499100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfb8d4ceb0f5e6f4de6badc29fdf1d22c90f1f096ddcf12673bf7acd68936dd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7W2401713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132ec68f79efc7fa51477e35743b37862460e003a7b875c369e61660ec9a4f20. 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/QZDA72572252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfb8d4ceb0f5e6f4de6badc29fdf1d22c90f1f096ddcf12673bf7acd68936dd. 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/QZZ7W2401713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597be146dfb45e74bf43ebe8721baff37def2698ae72cd53a4e73293047c4e1a. 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/QZPLR2532733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33479f0eab34ab21ee25d424f097c052f58bd3b8eaad7b2605ecf290868655b. 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/QZPLR2532734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720e158811ffd05a616627621521f5d4af5ba869559396d3005b5af9262f7a14. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:51:01Z), 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/QZPLR2532735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd806b4dea9762cadfc30825b47b5f1604969643f7522a76ac9bb3e4ebe747e09. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZPLR2532736.