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 0x48e5caa0c9958b29e6bd6fc8ba22305eed2096e10abaec447eda5cd46fd320d8. 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/d922c1fc-e985-4c6d-a8f7-c0d10d4f99e8.json and https://artists.proofprofile.net/proofs/artist/d922c1fc-e985-4c6d-a8f7-c0d10d4f99e8.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 0x5e71920caafd4fd97d9922e0bee1c01ca11a3ea6ef59d171f10b3ef0c9f49696. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH7811820332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daa50137d832d103c3f9010a4f798246585fa8d47e6174d40341a7837fe11ae. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:11:24Z), 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/CH7811820333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1174b7bba7e4a22794374c1bae9276c1d47ab8ad65f81c6eaa297c5ec2b557bb. 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/CH7811820334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3872d6efa9bef053f47f0261ef9a9fc19ef144fc1b9e23e8973f1eefbc11c34d. 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/CH7811820336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cd8b2358ccc114a66fbc76243b7b3a8ac5be919a48c0e489b2cdeb4226daefe. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH7811820338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cf4adc747d59b325ab56baa1e9de5abdd467e37310abf57bd4c161e4ac113e. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/CH7811820341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7588c8add67c57a5f0a4850c23f893a88e7447944751e91439a774046770f9b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CH7811927909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc944a5574d6ce6f2ec9094883227bc05cfba7db007d5dfe35169c09834352742. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:48:57Z), 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/CH7811930283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8342eee3fd343c23d63063062fe4cce000f1f217ead3f62cf4b6cbd1792dae3f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:43:09Z), 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/CH7812037593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b07452c61c1df283f8d9b950e2c53957cb88d9c3e1c1e4773f2e831c54ec18. 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/CH7812037595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290e7482a7346cabcea9ee937b43c9f3c0402ea789528b9ee38ef4246708234f. 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/CH7812037596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2157f2395e7d9a933cf2956963665c4743ec2a5231139f2bdb3c794eeb8a332d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CH7812037597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca57882579be779f9490cc76b57662748db125922ec273fa7c7abb1a5db4c8e5. 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/CH7812530500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df9e549b39ba3829dd73bca6484001e01964776ca472c9ec089da3572fd252d. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:00:23Z), 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/CH7812530501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c7b7e40cbd46567eef9ab097efb7778148c95acb5699fd1c0575fd53907afb. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/CH7812530502.