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 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 0x6a94f7dce5c353ba4ff41275138012f1daf7682fcfabf571fefc9d31b76428c5. 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/9f93262d-0bdc-4f19-b9f9-cbc2c05cb2dd.json and https://artists.proofprofile.net/proofs/artist/9f93262d-0bdc-4f19-b9f9-cbc2c05cb2dd.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 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 0xcd5d47129867f2a183dbd8a0ca8c7e084f2c3c9095e972ce0bf85178ae9c3242. 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/TCABE1267954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aee96e4e463c9a7d9bbbd1a1e5c8c20adbd4ef4402cd833c34a8ab9970b4f46. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCABE1267958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597d031f5c16ca63ae976e0d13f0b5482246aad38adb0682ccd02751ef1623b3. 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/TCABE1267959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7784422c048c6e5e93a5f0a0b6900b060a68645353b988de59c85ea828a5a3ee. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCABE1256994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83ac24fb66228b47459fc142dd18381c949ccf5e8c65e3491e66d551e766abe. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/USMR10400220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65598db35df1dff8362af0236e459723063caff50f08f6d0177d2683a39cbf11. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USMR10400239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ded0183b29cda7b417d9410b4470e8dd1c9b228c7731cb3ee4259e2ab45d6ea. 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/USMR10400240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca69706ec1cc713739ce51aeb194eff91710cdae117f8c69c86c054a7e151d6. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/USMR10400242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0948fd3fc498647cc68d7a6723148db8e3a2d4eeaebcd343ea7ccaccfbb100. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/USMR10400246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92864d2bb916847467438dda9d1d40ad5e4dbc002068cacca9444bf7c3723a0. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USF470600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20951301fb4b96c49e43580945ebd2f373b044243e36474c3ee7221047e5415a. 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/USF470600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22eff83519a3627195dd2f02e778d6f2679a15a10a4f26e3f768aabb52155851. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCACP1645631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597a50c0f87b7bbec66f32fd2855434d78c26dbe91b28b09abe1db3a30b65ba4. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/TCACP1645639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588f343bb174c2ca233ddebd9dcfad62679431dac0ddecea9df4cdad83341a69. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCACP1645641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e03d455cc02e6a725b09fdbf9af1e9a9f911cdd8046947b5b99b793b61dc08b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCACP1711801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ac45a672f88c54d93e5268e2a147348bd7edb7befe05dc79f082ac05fbaaec. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMAR31608317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634a6ddd186f9ed7c33763fe7efc19f4fbc4db9949b7225166573ef47aea38c8. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USCO92280701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec847767cedf7d48940d9181fe54b15eb97c064024b30dfce6d8f066defc0c49. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USCO92280702.