Presence may refer to: Arts, entertainment and media Film and television Presence (1993 film), a Russian drama Presence (2024 film), an American psychological thriller Witchtrap, or The Presence,
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 0xb4456aa8e3a26bce584a184e6fb215ae3eec41b484826eb47e258bf46d331644. 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/05d1d81a-27c1-472b-8dc1-f61864829175.json and https://artists.proofprofile.net/proofs/artist/05d1d81a-27c1-472b-8dc1-f61864829175.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 0x8e7050d854e4158a1f12ca28bdacf6cd746d6896a560916c063c140fe4095378. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZFZ42038831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7fabad62e5e4c37e3f60daaab6e78561f545a27a649592f02436d9a018e2ff. 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/QZNWU2066747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa731f3cb3adce869e624d18105a82e99b96aeda50bf92e3cbb3c9b01c2c9badf. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/CAN112200716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca81543c067923b372486252119f0118c0e995f7dbaa077380ef5aca56cfac5d. 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/CAN112200817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95ead64b1630986c2e3bb31418b1872bf5f1005f6292b8506fd53f815ddcb58. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CAN112201117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc7f01c907dda7bf94c97bda828e0697c09a72c10acf1103f183b7ff77fc070. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CAN112300458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74827bebc7e62a15f267fc66b2e22771f8259cf7ef2cbf647749fd42ebba282f. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CAN112300605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eaaffe74c8c55733e519a4fe5b4dc6df354793de7aa0bc65f68eb78c233383. 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/CAN112300771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2ca51c83dd3783cea256076eb91e91efbfa3c5f03f7dfbcc6054078f952c03. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAN112300772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e94464a23f5711f1698f9f818f19c3c10b7de4f23ae558388a2427f8be96df7. 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/CAN112300773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb941cd3b8d13e702c95c697adcf0d365ba45764cd19e63ef3374932a6d4e7949. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/CAN112400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6188e347da2d9cd5462ca7387385aa81adf73103239b2661e3e3e28c97797e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAN112400692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c9aa5ee020c6436aa427b62472547e271d2f7768fdd926e538dd2c5a9e4fe4. 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/CAN112401583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ed124b4b8c078ba49f140126abb86290c8f36edc595473664400a36e44c8a4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CAN112401581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6188e347da2d9cd5462ca7387385aa81adf73103239b2661e3e3e28c97797e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CAN112400692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f1f3d5bbf953ca05f54b0283d8ec34f003bb42540783e3c1e7f0674ab4bf83. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/CAN112401582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b64a3a5a90ef9e76dc01a4b3aca96a3c0c35a9a18e512c47be94d6d68014cd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CAN112400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebae822ad39ca5bb3aca13382104b79bf04977db6c1dea958d2b7ef9a5c6f537. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/CAN112401085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a01810daa4f7764238243384ba04195d99f1363117008be494768d7dfb152d. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/CAN112401584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ce86d9bcd36f40cada6747a48911082e8c801ddd9f5dd1b3699ac6e5b5680e. 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/CAN112401585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b73dad946eb99d0e06553de31fe2f4505eae1c202e2528f6a3c60508822935a. 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/CAN112401586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb941cd3b8d13e702c95c697adcf0d365ba45764cd19e63ef3374932a6d4e7949. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/CAN112400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc1fc6c676b3fabba2d61240732810a3f9693dc187d4dfe29ac350b25ae4825. 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/USL4R2042521.