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 0x980c49d52ea87d8e8834f247a78e537b6e583675aedd4e3426011de0ae5a141e. 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/71885c18-41d8-4f5f-989d-22c04d88b416.json and https://artists.proofprofile.net/proofs/artist/71885c18-41d8-4f5f-989d-22c04d88b416.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 0xc9f65ca2e8afd78b5457a54268d467eda9e1c3f6eec6824a257a35e0f085fde1. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEPI82221668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cce546571aba546c15c0e902732453e83229e2b24dc0aadad25a4f64e943b4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEPI82222079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc666f94478d52691af78e58771c81b2e3f8567394c4322c4e892c8b243f312fc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEPI82302511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb186a295edc0a7fe2459ce513f15c43b60e41c0c1df18671d99169aab4d38b30. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QM4TX2305850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1060aedd0f66283cac4416b0cf143146de42b2c599359d4e22a27bd3b682b43. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEPI82303601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c6e60c852479c0b0edb71b0efc6e879c4fa8a2dbd8100d78fe5c7240b9bd83. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEPI82312277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46de6beb7e998dc58f1dcde34ba3d5243c32da5cb9a5a5b867caa91d6025ad1e. 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/DEPI82402751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd237ecc4190de1577e0711059a2e35284f238e73ee2ab57c548dd972a94c0bf3. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:29Z), 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/DEPI82412107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2b87fed6f976c778c355ab0e7cae9d0291da80ebd9c88883a01235bc42f69b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEPI82416188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9359dbf4a11a523ca669ddabedf50406bdbf4a32d0c656fed2518b3ad2d7bd1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPI82430966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8413943ef3cb610b79abb0b6d1e9f95f13437c08988560b7e71616448d39181b. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/DEPI82435663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9d6f600972f8ae19e6e4eda15d050e028f2c31dddd7d0dab3da18b9ae71b63. 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/GX4R52150669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dd91fdcee9ace11fe1b3aa306672f13394484d6465911a0faed504167e6861. 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/DEPI82306745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079ebcaeb39999418308a8f27df37b6266720a8c0e453daa1d1a79894dcd99ea. 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/DEPI82302498.