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 0xd61302380a64d4ad2591db56988bf131a0151f3b30e6f8e0143d4f615e886b9d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0339981-d1f2-4deb-aef8-f7f19c2d9389.json and https://artists.proofprofile.net/proofs/artist/d0339981-d1f2-4deb-aef8-f7f19c2d9389.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 0x14e24c9603fd0da8a9e4b5f1a3a12581121b4d4a48cc779f9eae1ee51dbada0d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXIV82421737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6446ec96fbe6d3ed92cbf6f3db300b4cb214d7d0a3d0432b194f661d477937bc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXIV82446950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67490e125c4ef97e73fe9d0c094843aaf98b853d2b14209e4cf641f29800be87. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BXIV82438164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7c634c925bd0b9dad1c87b7da08bda96485cb1224067c12161e69c992c479c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXIV82440551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065814c4ca1c3433c9ccf718dcbff3f9e52b0a860f57898bef9b27303ea95687. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/BXIV82422300.
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 0xe3367d18d568046f848e1d35bf541ad42dfc06b4aa33378c0a171a3bc031096b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BXIV82441095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8408e7ed80c45592d35b3da28730aabb702e23afcddf0c6606f44bd75e8bc3a8. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BXIV82494568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d280cd3e1eb5f093126109860e43717391a1134c5c338710189aedf64c1ab4. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BXIV82445670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59195bc7a5464f11d187dc7df3ba2e7442298f9528af0d3ebb134bef737f1fb8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BXIV82418277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9382d6c57cf72a80c489146bdd1fe1f69d7a865f8296ca618897ba1c726ef784. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BXIV82466030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34677acd456d5c6979acddddad65467f46ff09509d5f9fab68265e5f83f995e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJX2280210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa497fc8f1f1551be88353b245b533445c49b9500013f469d8ec69ae2436601d2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJY2178454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56be41dd641b7a6eb15ee7acbd2fef5337a98005be8ec173cc941c672876e65. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZNJY2178451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77696e5d0684310f808685a3c294e6aaa1a633527836c4e7307a99791f47389. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXXYI2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc2fdaaf5801d9b81752c89b856d9b5977cc1de1e88ba0528551b9b227ed3f3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXXYI2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95273d928586737f12e13df4a22f5d9b918b674b4b44f10ca1c342024d4cd480. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXXYI2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ba13abf729b45a8377921160405f2ce1547dca7a9a2838fb077f7e721073d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXXYI2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8813f22f90528cc36a43695ee9c0f47f85fa6595331c90887636dfb28d17f067. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXXYI2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7459315560078828700b87e206eea441a6720ece0790c7821bc88873236ad3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZW9K2304727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752440bfd2a3c28e34c5980281a0615650d9dbf221eccb479151ef0ab5ab0231. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZHZ32233271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27789555fd3797e0d7101397449541a22b2c17073d1c08696d9188a74580165. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJY2313332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9288fdba93fd417f046d420cb45ae7e1420537af130365ba6c47906ed794cfa4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZW9K2304726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f5e3c7b6fa20293eccd1c46d60b07e500fe027e676912cbbd12005466309a5d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/BXXYI2200017.