Only may refer to: Music Albums Only (album), by Tommy Emmanuel, 2000 The Only, an EP by Dua Lipa, 2017 The Only (EP), by The Boyz Songs "Only" (Anthrax song), 1993 "Only" (Nine Inch Nails song
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 0x890ae36fa26cad8ac125348c3a57d4573fb63e3ed15b7e78fe067d2813953bf7. 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/b93b59a1-a7f5-4aed-a8bb-254b98b4e8ee.json and https://artists.proofprofile.net/proofs/artist/b93b59a1-a7f5-4aed-a8bb-254b98b4e8ee.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 0x91ee0ae56fd2bfb0486602e61547f13c75a83c5296e01868ad94a70f9904ba88. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNJY2035938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fafb93b67f60eae0170655d60261d6583187647495c535a434c1904f5311f6. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/BXJMK2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcc0dd312aa7a5a73d9138c1dd28f18cf0f57841b85bcbdad055d606322de6d. 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/BC3PG2303402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d759dbed6b8935119b9721980b8b1170238f46ebac953cd48c5910b47d16c32. 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/BC3PG2303035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7930349a44584d3958f34c39d078646ded29c6b08513dc232bb6284a36c16a7. 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/QZZEB2303012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78cdbf8cbb1d37687e1e4340046b45d68bb03cb5467ed11c1b9415034ef333c. 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/QZZEB2303138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d1b4e210b520f738f2af40d87225b0779f575c724bfe08bbf55e463da80b3e. 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/QZZEB2303140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb8d5fb94a94381e863cd2a7189c0035e3ec74a7f66e29ea6b36d121e5052a7a. 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/QZZEB2303176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8800e03ca6a14b8e9be4b517db540e13fb0240a3338f73c26c3ac6e27bd216. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZZEB2303183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1726209d4072a9023f96ad400ae424653a85e6b7b3b523de9ab9eb4e5a4a7751. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZZEB2303185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f7652f04ec6247a5d2d2a731af8ffc70039348a9fc59850ae6885f4630d190. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZZEB2303192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba51ba3ebd869fc60e9bb79d9e22fca0015807deea7d1e6dd39e945ac5c093c7. 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/QZZEB2303248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0514be99b4d6cafc012782d20a085bd53b4a2eebe4a734d67ddaed3f166813a1. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/QZZEB2303262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3521e2f784cf3b326f9a3c05f5ed189d80592da6ecbe95fee4ebe7d19fbbcdf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZZEB2303270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787d5af4719fc5bea0e28f0fe572f0400704f0af591df822d362803cacfc0643. 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/QZZEB2303277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e3998c1077647218fb6ada3ab0dd67e0cfe78df29b49995bcce6c8c491f148. Chain 2 (Bitcoin): anchored in block 956995 (2026-07-07T04:27:57Z), 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/QZZEB2303280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c5730443c05c250da8ae90211b98610002d50a6cea53b2346c0474bd03e103. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZZEB2303286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b4ec5c9e5da2d4399e81d6e7f8a43e04dfe3adb1e9af50653ef7b87eca16c6. 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/QZZEB2303289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd3ad2b99e4edf618145b14392ad78a5cb6566bf1fc2ec8d4ff72dadbd7c540. 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/QZZEB2303292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f303ad57b3533eef4a290f903a43f816e8b1791a18be9b5eed522df0d5eeb3c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZZEB2303294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0922ebcd374847b44610b68d8d8a9c3c69ccbbd9e5cbb2e8ee7aa448bc650db8. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZZEB2303296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e1c7fac3a0b089a97710a797b64b9857fdf676675fd512f76de92a247d2952. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZZEB2303301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cd75787b3129489f95ba8f5442f824bfae28ebc17297b14ccc7a6f33d07e0f. 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/QZZEB2303302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e59b6c3af2a959d7ed83726abf3ff066ee5e73a82e3e6940edfe4250724a0c. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZZEB2303304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415eeb0f8f01d2cdeb4fbe4cdf1ee346d987eade1fc746b1439f8b8c84f6210d. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZZEB2303305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82e9c7bc23ab9cbd47b7c4c4cd633b75cb347387bef4f5f66ccd27bf86d0c75. 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/QZW9M2207560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c05e18368cc78bfa53fa37769b8b2290338bd03f87d295e3656dbce81f040b3. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZW9M2207554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35380f1f1e55172fe81d8b84229e24aff7585e4a0561987787748c07b71e8894. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZW9M2207555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61efef1aade2659a027564ed3b6e3d300301449099ccdcb0874e4c6a9293fe5a. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZW9M2207557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72488df578576bfa45009eed8eeed3b7acc0dabff025efe27691c325386eaf59. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZW9M2207559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1295a927ba201a360b81b340742d0e83932b975472b7fa8e7d0729ef40485566. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZW9M2207556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7b0733bd726bba1d2a4652fea3c53eee015721a0598e976f75e93c656474c8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZW9M2207558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ff37ee58d7e1caba929b564a2006fedd7f7b215b7df449a7207dc9a10556ee. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/QZW9M2207561.