The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this
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 0x68f6bf56436fc8f22944ffae921b0aace841c8fef73de0b05cb795622a05fa70. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc76e3c0-7540-45d3-89fd-b8d2241322cc.json and https://artists.proofprofile.net/proofs/artist/cc76e3c0-7540-45d3-89fd-b8d2241322cc.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 0xb7e6c0f4ef3026f322b8eed08acb4636b34c0b0ef4628e2cf4d3d7c5e3eaf5fc. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHNB2562519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc368d1b55004e5888198948b4feca7749ff978d0042aefcae69769f64ca3f0dc. 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/QZHNB2562520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9c90bc723353b84934bd256ed81df062d4dde2974a0e65fb17c098ad50f5d8. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZHNB2562521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e0f5d821a80e1f939cddf719cd2a95648f0f2878cf51b1c96a0afb6d0290e4. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZHNB2562522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51c3a86e6eba47dfacea03baf0a42d3068a5afb8e5bcf3e2c73b63af2bccd0a. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZHNB2562523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff45345e67e368a5caeb53a507c3ef4cd163481c03cddb861c5958fa86da791. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZHNB2562524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f583102320414c7bcaa56f57bca175e598ee3791faca65640f70e0b44802a9. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZHNB2562525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef001713e4b4d7eded6413e4e98b76f1703aaddc86739b5114482167a617d966. 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/QZK6L2540063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b55d1250714c63687e30f53f714d07b775ba478ccf842d0f54fb1e2e02e236. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZK6M2554177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb66bab5864ffc89fbbadab0585fa20e24635cbb765bd3b497ebf47db3911a2f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZK6H2501679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddba54453568ab549f0a8321008c710352d521a4c39a65e0b7b2c41eaf73e39. 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/QZK6G2588596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9fe249766d0e2dd97fdd2dd1a9fc21afef5a893466565882088f3aec515c33. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QZK6H2510050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de1819922cde9f26375b8380fb66d63f9c3635e864b92a4ec6b1c4848aded08. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZMEM2565134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe54d2c09b3698a43b57e66ef188e4199e395f5e58270d2964baf22fd0e9b06b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZK6H2513547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a2d1c0cfe612f8b99b4b93faf98dab7a7c0b4b1b291aae1cba323263411dda. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZK6H2580531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4879934b4fe377aaad297a29238795257524bfde642fd10ff5df572e23ccf50d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAS2518842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612a9ea7b1d1f91c2ba9f4f2663e5f710e494182f7ef5f900c03a91670ac5205. 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/QZTB22584475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f47cf60b7c20bc7394844ae51a255454ee23cc6a44f9a437c02665ffcd4aa8. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZTB32568448.