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 0xe2da01b7a271a46540350a9ae19198978452b7ce161224d1895b8bfb4b014fcc. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a22d78f6-721f-4185-8259-6ae5ab15a2d1.json and https://artists.proofprofile.net/proofs/artist/a22d78f6-721f-4185-8259-6ae5ab15a2d1.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 0x6e8f55fec630ab994cbdbf1499cdf5b9d835811533846def0d5be35e100a5d5f. 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/QM6MZ2017946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1417e8359bd5b93d1753da8dc8eca62ba132b8321009aff2a211d92e2e76aee6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6MZ2017947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1bb28007e6c4cf178dc193d47143dbe5427d70aecc9968d124c03016e92253. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6MZ2017948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc329e295889fa6c2bc20ac458d3ce883e2631383d085c18940ce55df5bc26c2e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6MZ2017950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a62a20c7bc7df15ce889966fe13aa88b5b2ba1d2f463a8451fe2caa39fbb625. 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/QM6MZ2017951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968dfee60c2229c670b4703fc344ba7ff103ce0d8109f2fc31a2464699632786. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM6MZ2017953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc6d8ac8e2bc1b5e74834b1e43c0fc44c65b95c578d39e6bfaf52dd72288c67. 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/QMFME1991502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3a74de652b32e92edd628f1d5484df65fa54966b63e5ddb90804f2dbc3b406. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFME1991503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc4268325bde80113f7c31cedec109113ead526480c079e92cdcaea459afebb. 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/QMFME1991504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6daa1563f870deba8d2948e96206e5afcb80edbe2f488b9af363c3484fc5bf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QMFME1991505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755cecf7859334ccc319cd68565cfb51f42b248eb4ea12abc9f25de75a97c955. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QMFME1991506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592c35fddc8e177f238e07fa5d6a0fc8a2473480c1cb3958c699c6d7b8c16355. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QMFME1991507.
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 0xa81f256768dc5f6dd278667624298ee26caee3d782b4b477f332dafb9b0b9e6d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QMFME1991508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12762e962e20f8b7db97804af7fb48cb5dd73ae7c237d883ddb570d356f9660d. 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/QM6MZ2020061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb779f08d253f00387d778eb2bcbf3e4ca03f9e940ae80feae04e6940db04e8dc. 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/QM6MZ2020062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195f4b39306aa5fe1577a3166f5ff20a4438291610c70e7fc49f9168c7bfa568. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6MZ2020063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16bc8124ac7eda36cf87701394c3ef5f5997500287635bef97e338841d9d2bf3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:09:39Z), 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/QM6MZ2020065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d9c96d313e38ae649dd5e2c9c4de5c401cffc83c483d505e3980d2b67c048d. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QM6MZ2020060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6081aa983b551e864a7f72db17b165e23b457e4bcc4c00df4f2a414bd5b79f2. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/QM6MZ2020064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686b3072dd4d6941907ff77ada5db5f7d4bfd1a66549db21c4ed8ff5a7aec557. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM6MZ2020066.