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 0x8f8b4b363659496cc9d623794f8f5dc1a77fe6fd2bf62a95bec5b09aa4925820. 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/cbe4e68a-6f78-42fc-a66e-941895e171e6.json and https://artists.proofprofile.net/proofs/artist/cbe4e68a-6f78-42fc-a66e-941895e171e6.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 0xa58654372cc307bca5cdf569cf3d006bea876f2cc5ceda7030d7e4be8da59c6e. 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/UYB141603401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336b3ca0594488ff1fd224c3e09e066f3b65d483972f9c0da068ed8e8a1cdf2b. 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/UYB141603402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ce5f1afde9c446c8dcfb3ef4f44ebb8df12cc073f2647e80dff7b070a78e2c. 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/UYB141603403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc4c73384a2855255c8be47c09f806b18fab7b65dc82845113839a37f12708c. 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/UYB141603404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a962bd1d29586e17bb12be6b7fe438626bf8facfdd9f62ff33da0eda22c53aa. 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/UYB141603405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b85f6ed703d6d725899f6d454f1843dddaba71c9d0deb2f96a96f84516228e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:26:47Z), 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/UYB141603406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bca578fde2d54b8deb9473cc12e8f024811b6d8eb3d034d639c47ec4d600a0f. 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/UYB141603408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314b8c6dc48979ce1187b0b0c495e205455cc5006e591d579e7fd1b6a51eee55. 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/UYB140800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd9f4b23ebe0bc65bf3485cd9238a3542705c78814bf92c93fcee7ef953de2a. 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/UYB140800302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d974b46619213239dc438a42e880d5396dce75412737267f816f1b8383c9f98. 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/UYB140800303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f7c3411d1af69c4d70f6ef0f9bf8ab9532e5274caa3f4e1ff01be7248efa8e. 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/UYB140800305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736649602d69573e70600584ca0574420d0ddd440d10343bb2d1c91e65544d11. 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/UYB140800306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b585aaae988e7a3fadfc13bf58467037a7a897eab2bec28bdcd688f63263740. 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/UYB140800307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8b4ed509ac12fee43e7af89aab29d2cee203b046380e0d004b102a9332c1d8. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:29:06Z), 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/UYB140700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4ece96f124a09099ab5c2b5022e8e29307584fb7a02119ed520d93c64ea32d. 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/UYB140700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ae65373e8947c6b0bc1654084e9ab70ac652a1b005c0aab7b6a36790444b5b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/UYB140700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c754a61aff5e5a64e6235bedb1f4be23922251cf2cfb0aa54ca0870b8f502bc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UYB140700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a25877be1284b67df710bb9d8a71dc26e1fb82c511620efa4044f1af22e3aba. 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/UYB140700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1513f4781d0a1011bd3fd35fa58c7e692986eb03e444edf9dab4e191815a1b3. 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/UYB142017701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2ad71a09f7cd888654f68b39a3086c39018fa1d02313fe5647431eaa0fdb96. 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/UYB142017702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e77e1fd4e60267c365b75577178dcd452d0db0e975a5647c977fe70a7938a88. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:57:33Z), 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/UYB142017704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c9473fec70ce8bbf67f3562129da7df63fd5687059b7826835e21f55c2c43e. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/UYB142017705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc80ec3812ff1711e66eb071abc71260cdae2e86c954fbd265398df4bddba395c. 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/UYB142017706.
Solo en Busca de un Lugar (Homenaje a Los Estómagos)