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 0xebb35ccad1ceaea197ee3ed0d079f7808ed6bfc8e5e3d3056eea367dfdfe560e. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42125df2-ebeb-4d34-9ea4-97f2c1c9c0e5.json and https://artists.proofprofile.net/proofs/artist/42125df2-ebeb-4d34-9ea4-97f2c1c9c0e5.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 0x4e01ad5503a4904b19a41e7a55b032f5b47d10e03513ab23cfead2acf4196383. 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/USL4R0770796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd94a7dea499bcd8cfe965632abb71fb8443ae70886916a4389cba8bfcf9750. 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/USL4R0770797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800ea44c905dd41512cb1ab8679fccf175a7b84caee595b42c56dd3565052fa7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USL4R0770798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe1e706d3401c95120adcd3544ac3685b029c86efd54fa2a80aa296ff57ad4e. 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/USL4R0770799.
Sophronievskaia Cherubic Hymn, Russian Chant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b3243ca35a99705ffd1882a5fa6bafadbb4c164aa31208a7470e3c6b8cce8d. 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/USL4R0770800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e451f8e51fce3b7f0c67dbbe5031bb83bf8bc88308010f1c0dd6433ecbe8ba. 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/USL4R0770801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fad9d28d7fce3c545859202ca7d4482faa815b2eb13ec1a0ef73fd6a477fcf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USL4R0770803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972d027a5c9e93679d4c3367ddcd0f2711f81f20bd495d346865ec2610932c07. 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/USL4R0770804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5a3a7c37b439b45ab04dd775672610237342ecb4a9e8660be242b5c401fcf4. 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/USL4R0770805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e69c916d7c7bdd9b81d243496e81504929b782c5e414297c36a2ff9fafde696. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USL4R0770806.