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 0x7d6155ff8ba8d8bed13de6686e987ea353cd23d75df650a55f262c70dc84ccca. 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/a7689005-92d3-4396-aa37-d4ccf270f5fc.json and https://artists.proofprofile.net/proofs/artist/a7689005-92d3-4396-aa37-d4ccf270f5fc.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 0xa07a1e9c245bcbd6bd7a6744600649fc0c1a0a170b8e2b6fd0362f720fd84fe5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM4TX1953820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0021f92d5366d125d5140bead189fecfc938491e56f4f5ee5097fb9222b74541. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:35:01Z), 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/QM4TX1953822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00960c7722e7f7dddac3fcf91e88d33f3b1fea9f32c32a7e7807305158a30297. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM4TX1953824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0864d47a9966d389ea8e65cf0a7af95760e06fd0c08d7b3ed3bb1bcdc353c34. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:28:20Z), 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/QM4TX1953825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6931e2df621a61121331f180c3f985348743f5a101be3f34cacebcb5189b60b7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM4TX1953826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809bdd72fcddc6c1d64194e9d4bd906406ca8bfd8c941d49905eb930a5770c70. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM4TX1953828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5595f53af408104ec1b7d4b4d49c06c8d4dcfa7bc0b4771553861b6bed77c93. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM4TX1953829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd202abc59a6009acef255e89e9ee2c6619d5e270e9f3b7aa3eff7bebf7129fa3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:06:49Z), 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/QM4TX1953831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff660d4b1b7024e9f716fc628e6c175c7b17fb7c798e87de09a7bb9fc8c8429c. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QM4TX1953954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e8ae5ceef08e24f5185adc6f091c572d22d716b477cc00539e952f9580fc42. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QM4TW2056876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb548613b5dd35ad84a68502a17696a86352c5e9de2c5218729b5b95dffa1d1e5. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:38:46Z), 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/QM6N22070566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a454646658ba33688bfb662d24105159f1667de8e47d4cfa8cec98ec8c0b60. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QM6N22070567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74201bb3b8954dd54cdc833130f8421701a90d3540d816908a76e50e9b7c3135. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QM6MZ2206663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8e63a4bf5fa3c7ea38bce616a66577279ce8a568cdd899668a9991be40a557. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM6N22456095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8b746671fbe3c609d347a8700c9140ccc7932446b2f6af0ea6d2aa3cbb14eb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6N22456096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cd3442cdc1790959557431d5727af3b844382dc84ff5aabe0bc509d0336f2c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QM6N22456098.