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 0x7501bf6f12e2598404ca10d5c88e386d15719614ce4d00fbc3f5f79639f47914. 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/96a44d5e-94b7-445c-9456-f3ed6176c4ce.json and https://artists.proofprofile.net/proofs/artist/96a44d5e-94b7-445c-9456-f3ed6176c4ce.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 0x40410576ea43ae11406c84e501b8db39ecd49c9ba74f058a5fd67c56d0b14002. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZTBF2414934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71062a9d000dc53344fd25ca2d6259d3a88b7eae7a8921d3ba24841631d6367c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBF2411013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac84c2271bd6ff155b1cb3d04287b1108fd93c65e9b4b7151c9daa6e227b5daa. 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/GBMA22338050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729480b5b4319e320e9d8a7e2f8a90d9a889fcafdeaf8edbe76c9d34951eb3ae. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/GBMA22338053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0773ed286860944856507869c37ea25349eefddf71466d1bccb9a2e626953be0. 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/GBMA22338011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9f7650d5bf3fa036fa5c3014f11b888073d814b2652e08100aadc64d9b6d85. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/GBMA22338012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a7fb54746a75f8842f60897a86dfd5e37c100f77d2a0966cb422fdb80feec1. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/GBMA22338013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2593f2e26c0eb8cc15fa381d85edded134c18c8522bcd2ea81f6cd0bbd505f. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBMA22338017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37c82262ff861d21490da9f0e4aec4cbe7c7b4b5aaf947977f08000b01004eb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBMA22338058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0392040f2122749c546988a6c99abf14d6ff0b2a73c84687ebad32286429775e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22338060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dc6ed55f7aaa02adb808fb999ab68f78ba1f823b79d752db44275cc0a0effe. 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/GBMA22338073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc93d8bd6b80f96fa154d268694fc5a28b8f15526874e99ac711991af739a40d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTBC2459099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7c19aeadfdf66806a792b4e31f35028f4115f25cec71230f134c5e9fbc78de. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GX53U2533482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0124c74a23a1f194a93d04a2233922dbbf7d0ca9ea0d6e47dfe5d0363f316b9c. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/GXHAF2582031.