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 0xb229b0463f7509c1e31cd767429a5f2f52cc27ea4f497cca7223b7f08695c872. 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/4489251d-5901-4076-8e53-2cd9c1f92abd.json and https://artists.proofprofile.net/proofs/artist/4489251d-5901-4076-8e53-2cd9c1f92abd.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 0xfff35d8408b58e81c042ff86f35f221e5bc70594005cc5542833a0faf03662c7. 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/QM4TW1733251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a14a3fa8f08c14e7979b70cc8d5c53159313ad1883f3f2042269724db7ad6f. 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/QM4TW1733252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285854e5895a4f111c2707e3df2a32e0dae70593fd13078799d799f39e8c6d8c. 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/QM4TW1733253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b1d1a899aacd373663900668ca916a35e96f7b0ddc19956d7a58daa780de73. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:03:58Z), 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/QM4TW1733254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f61a17400dc72aed8a2b69f7ea84310ec2f484a9fc488af49ac33d7e14c8952. 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/QM4TW1733257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020d9d78bcabbbcf5eb20b62c95a1e434ab806943cda83a56c8da75498843215. 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/QM4TW1733258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb4d218cefe009063f3aabac79ea13737b6899f07afa7923d089ceaa7b3b09b7. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM4TW1733259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd0120ed45d171cfad89824b365791f3b5ae43db8d34577f1d880c00ec62a0c. 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/ES7051400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ee726121c4e6c4c7a1063bb74326e70c93d694b0f44102208249a163c0b406. 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/ES7051400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04a6423175dae415ea01c3c8f97aa7f35c70f20a3af16ff695e18fe2b5d762c. 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/ES7051400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1a780166b585a2f91db5f65c3f66d364f9534800364a5ea4b94d4129b98ffa. 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/ES7051400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb19912d5281074df26ff5888be49c7270f2e3ec22e8647907768c9ec3d62091. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:19:23Z), 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/ES7051400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc003d5d7be892be5da08df93709761f211faae3b80856b898a19d16e60196768. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ES7051400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05e83d4086cf0b52c1cbe8d25dea2c01811e87ba3e52662e68636b7817c629a. 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/QM4TW1621385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea5832ba10f52a48d6c8b64f636b6d22b896efc8762220f7f7f41f2ac419628. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TW1621392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ecdc9dd5b2a92436cf992f413825cb818366079b614d7962a0e102975aab3f. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM4TW1621393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9f15d7558844ec7e3d86aa73f18f9fc8df9e8428abbba185b7e7e8e43e2040. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QM4TW2011639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa02b3941bd211d12f0aa662b03ddaf2a867e8505af8dcc6f6da87230bd2803. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:40Z), 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/QMDA62206935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d17b0e4058e559c3df0b18917a4fb4eaec027ae839f0700fff14323f32909d. 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/QMFME2308004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0c33b5ce8a53065c889c619ab5a6593e5ab5823e01356b839fbc5c90105501. 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/QM4TW2435707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d56759af8e2c8d821644bf937947d4b440e9e3d96b0e700f1f7c0edbd53d90a. 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/USA2P2122679.
Somos la Fiesta (feat. Juanito Makandé, Antonio Carmona, Estopa, El Kanka, El Canijo de Jerez, Mr. Kilombo & Óscar Jaenada)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6926d6129d4862acb851e4aa40fe4923e735cc986f54e951974f96846e72ca8d. 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/ES5021900392.
El huracán (feat. Mr. Kilombo) - Acústica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f1ce35fcf38299eb04f2d924a82b075dd6e5b81f06ce083f66efbfe8c34c76. 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/ES5151900722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e671963184b458e5519e4f6be42d9155b76355a6faaed4a9f1d69bf8dc44d0. 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/ES5021800873.
La canción de la carretera (feat. Mr. Kilombo) - Acústica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe3a142e923df34b983115a16c72282cd0d19a295a245d705c7ae5b5afd5a91. 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/ES5151901626.