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 0x10dd06382b5f5e54e91c405be20220d5b1ee5ac2c99919db2af3fa24b6f8a311. 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/d815b2fb-1118-4020-8d1a-c641e1d47e8e.json and https://artists.proofprofile.net/proofs/artist/d815b2fb-1118-4020-8d1a-c641e1d47e8e.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 0x88f4d4b94880ba678935d583599b9ab66b2aabe29508698185d24f0f29d8a7e8. 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/UK7MY1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90609d3079877b97eefce2db6301196bce6e9a7c649f7dd316bbeda50f9fd44. 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/UK7MY1400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfbe17cc216cb8a7de0f5d7d6a1f54eb72f0ffa0627e3d4405232146edd0a55. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/UK7MY1400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c3a0de2ecbff6d032ef27f74c70f95be2fff26e01068819d0729f39575014d. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/UK7MY1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a44c33048362bda60c8d126c97f1540b79b45b3e209f4d0ab8aa706ce9fa2a. 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/UK7MY1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c42fd71a150a4db8d7ee78bd4088323f09f87007a51c079de8d916f244cf0c8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/UK7MY1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb900dc8a393eb2ca7a4f9d9b44a2acbf83014845bf98d8533a8b9d4ef1e6542b. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:12:54Z), 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/UK7MY2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfec216bcbb11beeb59f594f7c967137daba5061f6f2b582db4cb38015a321b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/UK7MY2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edcb2a35806dbde488c78895d1ab0f1f2a45c5651c067c0c5b8a902a6ebd6d2. 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/UK7MY2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afdd4b8d5ea1e4561999e628931ab8c52d37ba249c612705fefa8bdc637c247. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UK7MY2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd75506d888ff1efc66572a38b6ad51766d5cf48859b48edfb737aa14b8454b9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/UK7MY2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb900dc8a393eb2ca7a4f9d9b44a2acbf83014845bf98d8533a8b9d4ef1e6542b. 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/UK7MY2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11947885bb2e0d1fa97ef12c85d2251c2e90f9d6ff8403913223a426c724271f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UK7MY2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31eab49d42f5f185ff90b523fb172b6abd6daa928fa05e2ae0e2c9c66e6df2e. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/UK7MY2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d29a70c3390db16ab14df818b63825abdd669f1aabd319680b1d36afd916921. 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/UK7MY2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18dbbbfada624e3a91e096cc245f37af5778948ddf63d52d3b74aff74a22cc1. 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/UK7MY2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf6966e000f8e034bb7bcec53ab67f33812df181c9e3b47458f9b5fefd56cee. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/UK7MY2400001.