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 0xbc2774ab2a51b3286637b73379fc44e80d3373f0fc0c26b14d585849bca3c320. 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/535c6ccb-ae87-44d3-8320-60132f16a0e3.json and https://artists.proofprofile.net/proofs/artist/535c6ccb-ae87-44d3-8320-60132f16a0e3.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 0xa495be527323753f65193f7c3a3bc5ef2c59d63fdbd2b07bdd7400ab2ceedae3. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FRZ042001099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe71cd662a89bc9ce857e99babab32419e9c35ad1611a48a853fbfc8674213f0. 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/FRZ042001245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c506dbda6dc02f6817989dd82c89cc457e5b3533400d40e090dc91dbf9fb9a9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRZ042100776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b925d6259e811d19edd612f7f5b921e9482b6acdd8d8495815de0f37c1f38d9. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FRZ042100939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcb59605bab9991d943a61d926c0bffeddd17c9a5fbc50a32287934d05e41c5. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRZ042200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca04aefc9d770cc8aad31d99dbe5ed079feef1fcba3ec78afbd7353b8b9dad2. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FRZ042200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb811ac1d18a67ec7b97cf27844bc5975f2ebfbb2e1fe1fc6b9a6e44af8e55e5. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FRZ042200054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2482e96b2bf29d843948cfffacbe65c0c886bbae7240305ee79b5b76526a30. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FRZ042200056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcb59605bab9991d943a61d926c0bffeddd17c9a5fbc50a32287934d05e41c5. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRZ042200058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a26b01e410c950a9e1bf2477728b29678ee706f2a2fbe9c5462d33b88edc923. 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/FRZ042200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1656fad8dd273b4cb6a85a2d570225c10b1ca8f1fe3b684df42ce388d3b295. 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/FRZ042200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7540fc6315efafb0b19e36d1f7f3d135f0eb2ca4c4ddaf2063ba6d41297ef3e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRZ042201594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7158d3f1f0884faa26f29ea62c91801fdba55fea5aab65e35fc872ff86bb11c1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRZ042300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b47cc9bedbc3407a9ba27b01428215cf3693785e1c2045bf0cb56abfffc7bd2. 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/FRZ042300677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b47cc9bedbc3407a9ba27b01428215cf3693785e1c2045bf0cb56abfffc7bd2. 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/FRZ042300677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a6344d35fad47658ca6e01e3251cc27e847a37066fb76e6580549db96ed301. 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/FRZ042300678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4eb838bc18258e43563ff8c02c49e13be94d6d55a1882a772f9659c5de5c75. 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/FRZ042300679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282430c63f66e20740a74e57f96589d2a350ef7d9debe82897ad6a9d6635397c. 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/FRZ042300545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246c55d9e79ee189a73ecdce33eb9ad3256056c29fc9d3f5bcfdb7cd9ab6d38e. 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/FRZ042300680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b0a4525bd5d6f5735ec3b92932ef5b8135fe3f74fd08b24acc2f1167b9f169. 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/FRZ042300681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8956c7ce3867742dc0ef999d3ef72c64b5b4d111062409de6817efac5910c977. 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/FRZ042300682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a2542d0ba64142a089324df10b0b0548a866002939e67312b837bd217154ba. 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/FRZ042300683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7158d3f1f0884faa26f29ea62c91801fdba55fea5aab65e35fc872ff86bb11c1. 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/FRZ042300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9baf2add7d01fd0755c95a96d8d53e0e745f8ff8a843cfefe0019e82dbc5b2. 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/FRZ042300684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3178ae4cf2590b6f22c2a54a77eea86770d8830d9d774b6bf1464acefee3fe1d. 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/FRZ042300685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc545b3ef91674a218ad766fe369f04d6e8a2da0358f74e192e6ff3f60923d34b. 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/FRZ042300686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841dc34c5fe5d260c3ec69a3ab876c386071c4dc12b434c4c122d577338e328a. 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/FRZ042300687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3f17280e861fc4609452c9567b851f47baf0bda38cd27c8a2a7a53ac8e48d7. 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/FRZ042300688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d164307abdda627e2b5abbddf073cb78a18b73e5843f1deda3271268ba9b86. 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/FRZ042400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3081939caf1a9b8a78cbb7d829f39f58e46d89dcf55946db55ae695fabf4056. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRX762405935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1b6bcc596b1c4322b8e7a4dadff69de1c37ca964b9f0470f255c63681e5ab3. 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/FR8FB2209130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe71cd662a89bc9ce857e99babab32419e9c35ad1611a48a853fbfc8674213f0. 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/FRZ042001245.