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 0x3d19c9ac5f6de833fb83dc2d743b5c735f99e799b2272cc7f098440af4ddb966. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b388c99f-4ae7-4c7e-9baf-d2a9950144a6.json and https://artists.proofprofile.net/proofs/artist/b388c99f-4ae7-4c7e-9baf-d2a9950144a6.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 0x237014b039bbef3e5284c5fc1015169e96f439ebb4680688c97a6704c3047cfe. 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/SE6I32406304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91501e2c6baee2aa3aa2e2d5385781811aefcdff8b5127c0375d650f96847861. 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/SE6HN2415433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd83d56f17685e3e27c1b90c59626f6ac5f414c0adc58a193064cd2f9ccc1025. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/SE5752485804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0db00f9ef6ae82a1a6d43cb422017284ab39e2f590d3212b066595117cadb7. 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/QZTAZ2222643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b6b24fe494d1805ea00fe59d154230cb74d4a5e4c6b557aa8c5707073fe6e0. 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/QZTAZ2222645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db48b36a119aa917547ec712492d1b92b98d0475dc98c39f0961082ed0cf128. 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/QZTAZ2222651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248fa8b38863a4a5e7491ef5d450918f00a9ef062d58160cfea5b3b9b5250687. 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/SE6QE2464537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb015a68d6f44e0bdc609a1406f01f5f4d5c31b1e058aa4ec378d97a151a77d0b. 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/SE5BU2478840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015bcecc0bd7282caf40552e48eedd2a8a7543390f18d74f54d2a2b13c65f6e7. 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/QZDA52431010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfb6bd69934bbd7b9e35695e7e21bf1b1b61a92d69c783821bdc6eb74c79b94. 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/QZWFS2331968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55955f6b33692c19c3259f6745676706c97447f15a3ee467067e002d0543d851. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTAW2388978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f4066e9f2c8af0f93088b7222aa7d2e7ad4d623ff2298ccf58f954e86ec8f0. 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/QZMEP2328433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d6433917c0c6663fc45f3d71cb3531bfb2d6926ad816dc07d0a319667e3c92. 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/QZK6L2311824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42a25cbebd37ef10c7acb07aaa818d996847814f51876354d28f30d2d020061. 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/QZHN82308482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193c7bda169b052179afb07cfcc5d45f8cbf3ebe193a69227624520e85b5eb5e. 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/QZTB72251054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85455c2d49fcc5f1da13d0ff52f27be6b7efd290613d99255af090bc001ccd30. 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/QZES82291337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ffc0e38d0843f2c47fb708bbe1d9f0cdcbe964e497d778698cf69e1f298c8d. 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/SE6XX2361848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf513ad218613e9337365b93d20ced66a58a0e6b20bafbe1a5b0738eef3f2648a. 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/SE6SA2446665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9b54918f98c35b1be3b423915f577aa9d05d814e099720036da21ae30d1b61. 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/QT3EY2449258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5e002c7994445504395fa3626c818b2433d21c7dfbbee6c892d304e1dc0b27. 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/QZFZ32572457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfb6bd69934bbd7b9e35695e7e21bf1b1b61a92d69c783821bdc6eb74c79b94. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWFS2331968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9b54918f98c35b1be3b423915f577aa9d05d814e099720036da21ae30d1b61. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QT3EY2449258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322d3e42793162cf4bf89728ed9d3d44854561aa8c760ea1b23826a28447f11a. 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/QZWFR2484711.