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 0xdcf6d75dd3d411271dbe623808ecc4b60d99b2f1464ab5a4d1bb78772504b1a6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d36049d2-92fd-4490-8b11-589d657760b9.json and https://artists.proofprofile.net/proofs/artist/d36049d2-92fd-4490-8b11-589d657760b9.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 0x40cf8fcb3ef4a59490ec13b25c6e34fbb7f4bc24fcb625909d6118d96c64a912. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75fb24c643f82e22bdc68e2e2b1f849d56f2f52f5fc4d497eb5f2a634999dcb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd64a25a6d77d7856c4def0db901d25c79aa39b5ff7d01df695a3be7e70ad21. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ffa0357394b81f2b0cc062ae5f4cb0072617190c1fad1af76bf3fe4314f22a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd2108e434802d8f07a9b91cb6f46c75e60fed60648bfd0d016ac9f95c01668. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa626a63a270c4d8e345074a4092dda579afcac942b7bcc4f9df4ccab87da5e0f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0181769dcbd41a7d2b8aba1d2f9a6adea241bc13d6c9638a115739251d35071. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f24fd1702421e3485ce4a22ae263bc313572058e4b97bdcb459bb9fe5a1311d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25c0999722b081634e458e280f206759af39c0195282e99ce32dd9a245635c3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99721d62327c3115b5cff5e28bbfc45ea7f34c6dcd8a66390e1ee92e2ccae6f5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34401723ffdc16a9c7466110abc92209102042243e77223a0895ab483e47ab89. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf096ba48d948cd6501836bf5c6b44f1e3fb363a2a85d9ebba7d84ac66ffa001. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc721fc27f8a6384d0afb322a0eceaa78a750c24247977c4a9025e38391b0d6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEBAA2102013.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfc13d1e9df6dd9d594b17f1e996dbc19f18a54222d5c15422d4c213e374865. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190567111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7535205269fa9d49ebc97d2d180d70e8bbe67cd8d584d15a3da851f2afafb28. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190853511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013760f140064b3d8f390a7fd1416df5d1134797e85603f93e9562993c98d6fa. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190567103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06758215c8e5424ddf1beabcca2a1e8b4877224aa400f4f42ddd7ceacbb71931. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190567101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2110dc67115f256f849bc95fcfb05f4a01142ac4e6568eba281045501fddac83. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190567107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf226690af1eccdd7c92f684812b5e9ae25304de59805ec2d8abd8b3774cd2d05. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190567102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc065ef1df14f93bf8e050a41113a6d4b37e126addadf5de1f67769ad2e5f6e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI190567108.