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 0x02748642eb0cade2c4b7b2da147fd17c34f57349606f6c0533f610e907796e4d. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26bdf4b5-f8a3-448a-911c-1133f66d7edb.json and https://artists.proofprofile.net/proofs/artist/26bdf4b5-f8a3-448a-911c-1133f66d7edb.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 0x1c1aa8ce5a8c29c0f912616783fb730e1d0f3e92ffbfe578c090d1027588d072. 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/HKG731894208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c5168dd4757818c72097fd4fb5a132c92ffe973226b373dc10526d3f12cdf6. 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/HKG732147367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9637935bfd95a4934a963bdac66fe2d4ed8a31ca387687fa0fd8e78921b2578a. 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/HKG732147368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ec5819399af6c1322cec29f87d9150ae10a92f1eb9c15cbe937f2780d4f911. 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/HKG732147374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b706e435b572f3011f6d9407a488e5cb0d1199939b991c28ac5a8c1d116877. 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/HKG732147376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93cee96696364b19ad6234ee746f158d93a4b31a6c8f8b7fe6b8b7ee388c85d. 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/HKG732147377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f308e8a719d722c1a13b5334494f83f556ce9212ec93cf9d605bfc7ee2bb67. 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/QZJPM2486603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135d7f9ee01ecc5b811252845e61c0cbc556a56171863ddbb0ef60539525bf3d. 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/QZJPM2486612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0b718daab5a3eabb478be3beb10f44d2fcf47eb4df3c61340490a02b463ef2. 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/QZJPM2486619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99dea3e5f808be9fc4cfe60a09e4884c2114ab190f1c46e4e23ee9493be04b5. 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/QZJPM2486628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840bb787f6b947bc0c8aba05d1bfc7dad11fed85ff8cc472eef6daec7ec3739e. 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/QZJPM2486639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534e0ef992c4b84761ee421bf8e3a3079a8e0519be86bda8bf4c1f3f01d88c4d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZJPM2486645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f14fa26097b011b548ff0e00cda9fe2e88a45adb4c9775349b0bc0a631e48d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZJPM2486604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fef36ce1e498e191aa9d5b297aec6fcffd77724bdd42a5cd5d93c460905d1b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZJPM2486606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7598bdfb461a3601948249dec4dcc5ad3b36d9ec969fb5665af7e7c7a5f0528. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZJPM2486608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ba4543c2c19246b52542da72ab22d9276191b53963d23b5285470afe8854aa. 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/QZJPM2486614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x015bb2ab673b6854d0607395d205fedad2824ac3f54533a471bab0b43def6dcf. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZJPM2486622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09c84e58099eb135ab60de35a86a451610683ab0e7281a1e8af687c5ef15ded. 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/QZJPM2486632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807d7893ce8b8dec43f9fa55f68966de44073c9af945d91dbf2579b525526c11. 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/HKG732252036.