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 0xbc93e2303db1e922ae4a5121a1b63bca0e5345f68c71006bda8e8a6b7678dc53. 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/47cae380-c81e-4d64-a8d0-9f9c58fd0805.json and https://artists.proofprofile.net/proofs/artist/47cae380-c81e-4d64-a8d0-9f9c58fd0805.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 0xe73cfbeeba93fe3de498039138f354de3ed6eacdf39f748b1c4fc8c4426c16e5. 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/QZRD92202055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be5c6be09cbed25bfa24768898b55a4470853117c1ea857bb8a7d4b53ce5f4d. 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/QZRD92201643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282b76f6f02815cb07512b5d34368c0a326fab2facbe72b5acaef7792276c7a7. 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/QZRD92202065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52294b1a43908c91c95476b4e2437c3c015b86f28d49923ebc349e32182bc880. 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/QM4TX2453202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2788baf8eb4db4dbef818916f99f14c284f9ef006f2e32a598b6547e15b6bc3a. 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/QZRD92303704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282b76f6f02815cb07512b5d34368c0a326fab2facbe72b5acaef7792276c7a7. 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/QZRD92202065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6227def4ec592a267b09fb28290d8581971229b7f8b2e87b5fccd41c25da7264. 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/QZRD92303710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73cfbeeba93fe3de498039138f354de3ed6eacdf39f748b1c4fc8c4426c16e5. 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/QZRD92202055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72b2b67cde271ea2bf1157f9f3ab74987b3c52c77113bc5f8823c33f0c8c823. 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/QM6N22427593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3ac70d83836b18e427bb21ac77e9767aea48c5ba3f8c220f8dd723e33b2bb3. 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/USAT22214214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba189ade6ca8318e5115b2be5bb7c1ec3128f05f19d1234574bd660d4bb4848. 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/QZL382250293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a637a9e4ca3798fcfe8c604a5fc6ac7fcaa5a42eecd44d0141aec1f6e31493f. 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/QZNMY2112736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f97367d9b5e7b37c37ed4e15f8926771a8388b5287b5f1bfb7e11877c81ca7. 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/QZNMY2112738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d89029536b481d5f99d47b74a9c4e5dafe60f3821aec111ad1ab683aab96f20. 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/QZNMY2112739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d1d64076b7cb15a8092795c182e832a99e802ca0554cd31bf5bd6ae77ce65e. 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/USUM72219311.