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 0x269825ee83a97f3039f5cd359d6901643c6f8573759fc0534a153363ab629cfb. 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/4e0f65b1-ae64-4906-9b7f-fc388c59d42b.json and https://artists.proofprofile.net/proofs/artist/4e0f65b1-ae64-4906-9b7f-fc388c59d42b.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 0x4fe81ddd29458f8b6df67d6446bcbda16f918226cb5f49399310a42704ab2c93. 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/QZHN42328521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45403eb96b38219f1739965dd6547eb6d0c5984def16b6d56ffec73e3d99e967. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:26Z), 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/QZFYY2498574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4f068c6d7ffe5c8ea6aaf3907ac1a3b0c78a6546b50ae78369dbf6bd5b82fd. 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/QZDA72491349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45403eb96b38219f1739965dd6547eb6d0c5984def16b6d56ffec73e3d99e967. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:32:51Z), 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/QZFYY2498574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4f068c6d7ffe5c8ea6aaf3907ac1a3b0c78a6546b50ae78369dbf6bd5b82fd. 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/QZDA72491349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45403eb96b38219f1739965dd6547eb6d0c5984def16b6d56ffec73e3d99e967. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZFYY2498574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152e1fe306fe5579f415c99bcc94ff77780b7cfc5b1f0977527810b5c0c9f5a8. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZK6P2426834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1ae7e3ec73088b32fcb3cae061f52b5d1c0efc51322c678c5d4fdb44f90bd2. 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/QZK6P2426835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461e6d6733f5739974b623a50b6db46c31f848e6f65df606740176d182ecdddb. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6P2426841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa053915225fc82cdf9a1cc2529fa85c58bc780eaa2353712056eb3cfa648de78. 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/QZRP52422987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa4659291d2b04d967854d92fa2753a3b66e20629c0f297bef6c2b7452821f4. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/QZRP52422989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d40dee9f9fa295a60e161f05063624b5ae84b7f4e300c86267504da6b4ce1ba. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:12:34Z), 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/QZRP52422990.