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 0x7c6bde93567c8de81db96fc7db5362bb0964e04449d4a111a9dc9f0bfb3b3831. 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/41580b7d-3955-4b62-9597-e3309640fc43.json and https://artists.proofprofile.net/proofs/artist/41580b7d-3955-4b62-9597-e3309640fc43.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 0xa2693229cc6cc2e4931331de5fec9835dccac643ecdfca3b562fee8fa1746f81. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAU119307635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10914f2989e9ce87461ea80ee49f11a753e41ae78df6b394858e7f05f7e37895. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAU119307636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3267e706df4a5e8eb939badbb05ba77750443ebe4935d2b38b14d37464a7450. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CAU119307637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdaee98e1c50c2614f774a5267417540050a94c34991d66ca9902c6f8fe78a42. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CAU119307641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b155e0df85dd3ddef445afebe4637754f415262242a74c3c053a08df9a662e5. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CAU119307642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fdfc45b0c4d8b02538a9d6c423a7223273e932d1e517bef65a5d2fc407a5a3. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/CAUM70600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8e9c9558fa9d7f108472b974a58cb37c9f0d8a350eca5662d65a5b255e560fd. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/CAM199600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22fd0a6fbee5aa920b0f2085774ffe5cf6f524e1b22bcc2196f7b2ff01f7e2a. 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/CAE159800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1720e10f7f2d027cae633be552cdfb7bd23ed4ff24713fb1ed52dca45a7a475b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/CAE159800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c2eda7241d13370dd3621bd94d94bc9062a92d264c6f31536e1fcd65200da4. 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/CAE159800018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3d2ef0ccbd86cd8954e43d344b17b586d59dd5cad86f994eef001428715ea8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/CAE159800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6dbf6c7146835289cfe5c09b14d7e2f1cabf8091fe2a5742029715ddef26be. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:29:54Z), 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/CAE150100229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319e03568188bc21ddaf05bd40bee1d650c3510f28b87202b671f48887594cf8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CAUM70600049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a44e820cecb3ba079c8a231a9a8c9e2762fd4f0c32513d5792b76ab474e022. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAUM70600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x982c958d5d5da5c2d5c08b5ab43f4daa8f93ad30525822c79ae8de449da82e84. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/CAUM70600048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb299e8895ecf1d971b0a2aa63cf5416e407372565e374a23a96b8200c78a3b15. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/CAM371602296.