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 0x9f25a2872900962c5a0527f7d6275171f2ff271f3409f6b37d801098a04625fe. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5196695-5086-402e-8585-bb2889c3f53f.json and https://artists.proofprofile.net/proofs/artist/c5196695-5086-402e-8585-bb2889c3f53f.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 0x5684ad118eed3ba7dd1ce6241dc8d65cc0cf99cec983e4a361d1102da24c536f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/TCAER2015993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d2a62f7e10776131b906263b490021a531cb999753602887d6aba8b3fd0921. 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/QZFYZ2011567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba343a8067f0f0376a2c6adaf362d9310d7df920c3302b6246d641aa0ca155d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USYBL2302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1422fbfd7c6016951bb87c67611f768a671937ced6af1ba04dfd0c9e40f66640. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USYBL2302011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960180ca01e93a6896e9d87aac86444706919a63710d8668e34531c86558efc7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USYBL2302012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a093d6d4425bc51e8728fc869cd4531f114816f75d2ad46fe88faba5217400. 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/USYBL2302013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c0a65bae46729cd172f4be7ba4be1e34aee55cd269fb51bf6028f8f700ff96. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USYBL2302014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc9f6a299e461e91f61e88aa0d546a6c83833ce8aae684edd7f8760bd40cc97. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USYBL2302015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5034ecbc773e7071add4305fc94634fcd98a74f15d031d62bd6dc2d0f781263d. 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/USYBL2301897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a577ebfe8286a4ffc086ff0401c25cb8d091ad1813e1e60a59093fc59ae2080. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/USYBL2302017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70185a5af4188a3ad5fe6cacef168c6645fea99c203887ad7556c839ec538dc5. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USYBL2302018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23a8136237ed16ba6017ee95a5ff4db464ba938d5f5fdd327c0fb700820cb36. 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/USYBL2302019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad20f3de89f3668059271b324e656ef3d5c04dc22a73d957b1549c99650f479. 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/USYBL2302020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7db355521c5c6ce51877868025d81fb783bdf24614b0a146391140acfaae45a. 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/USYBL2302021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b30e5e43190efb44a360045e163a1833f6a6e0bfe1a7ea761df7dd29661acd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USYBL2302022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9617beef596cd6347253978da5206c664c10bc11a2d26930cf875d20a6ed07d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZS672133194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb240c19cf3c86cb2d78daf9741aad7b38c71d8fd6b25809f889cdf34f9b82dc. 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/QM24S1902280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc162c0bcdf1e8b0bddfc6141a97d2a271561303a3a4d7ffb9de1a54f81238a5a. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZWFS2468516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab267841dca79776a991ba6053b1c6914864d9bb1764e762e7a31a8192b871e5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NL3M12400304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a82965bfe34610241e5709e670053d446da57a5ea3e73673d6c46697bc020e. 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/NL3M12400315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64452a067ce8479fa73f4d24ae3d40bff798788503f722e1456b8b1507acbca1. 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/NL3M12400316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c03038969d70a02edca5abc6c18219c0df9531a671947af91bb051f76958a5a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NL3M12400305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab267841dca79776a991ba6053b1c6914864d9bb1764e762e7a31a8192b871e5. 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/NL3M12400304.