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 0xb21e204c8a30fcdc18c407eb07f7146c97a32a07179cf282a13c0cd3a3e1e760. 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/f7107545-e0fb-46cb-bf7c-08a2fe5e7754.json and https://artists.proofprofile.net/proofs/artist/f7107545-e0fb-46cb-bf7c-08a2fe5e7754.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 0x2b39998796c2b9abd9379b0a07fb5a22444375af0e739afe19079dc3fd2ef7a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR2X41610426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2851f7b2cf94690955ed053e74dff31697488bc726cbb2eb9d3acac823bb7ddd. 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/FR2X41610429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cc7869cd532ac6665a2b3e3b513298a551835aaf17cde1405fe7526ee764bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR2X41610431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735a33b4ce52f2a4342d2b6646ae1f697f48d1ff1d25b571c20a69dc0ecaa112. 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/FR2X41610433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a74d166160da7296b8240343b990655ffb13db8d74f5a3051bec6d577004120. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR2X41610437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff97b941f18e9aaf479aca585054056c3864da5b91cbeb48699cb96e81967e7c. 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/GBLFP0203295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7ea71b07903de4928e92de09769a566f74328cc1863ae819f4f737e71a84f6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US6R21346163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f3701c703b303cd99a90ff363df5a28118af5d2df1f2bb14fd4c6712026d65. 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/US6R21346168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c6699dd3aa3c146facc14fcbf9296e11ccfc25f41aebcbb18c0f17aea8cf6d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US6R21346169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bdd1739f718a4bce97d37f7d595a15ad105270c51670d83ad3d533e4c68c5d7. 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/GBY711010041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd04f1b9ac81ed61990d34980ea27505a6335fe9b388c4a7bcfb2bfe78bfe30. 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/GBUDY0900207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8885b77182f9c0c3493edad68ed74e84c697a7e2e10712dbd5c89522f9952f9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBUDY0900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa334d86a382b0cf477f849a15c1dd20565cf5cccfaa6c73a4f808d654ecd772. 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/GBUDY0900213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4863b807e8d8954b111e6388a948200a864d528557c832a928cdfcb363b5771. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBXFY0800183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9c07d01507ee96e394b49264059968ad421b3003a03468946e7ffc6155fa87. 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/GBXFY0800194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2812c8e617eef9ad3c67148828eda50c9cdd5fdf3e7737c427201142ca70a047. 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/QMDA62248028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3a06a320fbed1a93d728fbe4dfd796f922731e68c0fe67d99f28137c9bae0c. 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/QM4TX2230514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d801132879e23bddd54fc2e4740b9ae42820ab4770a699f16cfbad525471a09. 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/GBY711200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7d1c7e1bee7c43c7f297124e24ac1464934a414c575527de2ab6c37c24259a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBY711200093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd718da5703b33cfda7100623c1eabd328291ede16184a76ac4c5c1833059df. 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/USA370668456.