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 0xe80be836a0b773d31d47e6662291707450adf808e220008e4cada7cd027f6c68. 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/f61c40f2-e84d-433e-8253-0ac51b75f1ea.json and https://artists.proofprofile.net/proofs/artist/f61c40f2-e84d-433e-8253-0ac51b75f1ea.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 0x1c683ea1d15f1d4163ef5e3492fc8b673d6c4bb72c124a73b14cc491c95b0ea3. 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/QZW9K2326382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9360e92433caa4f5a4809314456df989697fe6384d17be0524dd0f4d1a2213b7. 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/QZ5AB2415104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f7264f19c3740f3da44857074c5eed742760aad59ec5d681dfa2ecc53d28da. 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/QZMZ92401854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b732ac41b8e2e304e5208468a958e089e06a65c2fc1b0a75e5b88d78e97071. 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/QZNJW2480209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f77a0d1e479bec3c92a7fdd5e5b1e4f16d014edfb4e0d2c577cf633e617f4a. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNJX2402609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f84801bc6bbfdbe773c9f70058eb32db59a58b0eed8a31987b14b157f5e8268. 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/QZNWU2446546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ab50975e4c050673583d770690cc9156779786ca4a1499a90e02b8c705c66f. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNWU2450183.
Freestyle Pa La Carretera #javierxsiempre #yuyinxsiempre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd001055b213546e5d16d429f64b92f7fc91b3b0bd2eac123612cabca023a5ae5. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3FD2553560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7054b142edc5f329b4c5a74c93b787fbdcacf944444bf35885c4ea33d33b5f9a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZHN82451399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e63f4250a65c66104e1b42b800739df6f992639251943dd3361732785508184. 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/QZMEN2380372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf188d23807ecf8d1a6099c0dacb5b8658b27f67412f6e07f61465ecbf0a5e70d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM7282412068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd8f4bcf936f33a2c5a04efff54316b544b32a936e11e8768889eb006c4226e4. 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/QZHNA2372968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88894f762930349aa8d3402a8b2338f04c19531a9b53643068bd83ab3ae066e2. 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/QZHN92318542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adcdd695bf1bc5b520d3dbdb900f6ae56f4b4bfd5c0d1b6af7282adaee4bf1d. 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/QZHN92310199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5ec07591d6954173ccb267f625d5f77544b665ae61a01d7f68c26e77ebe684. 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/MX2832264238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9c742057f7a2ee2d5037b53602154eb64f46ce01c0161910283c71d85bdfef. 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/MX2832251742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9423871671695d6a4f8bda939ec82828f13962a80a06d9f4d1782242a336cf1. 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/MX2832147259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e3a2aacb83dc3fa895db38b15b74f15752e9fdaa4897b73a683e535d9e82f7. 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/MX2832145995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8820efad8362ddc0242e5d8a8b803a8da0b55d8a5b46ad072559aad00c3ea7. 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/QZW9L2493964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a96c31d409be822aa15f8fac71c4bf1ae67868cfb9c7c137d7a6563e439029. 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/QZTAW2492999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd60276820944292065f3be50f11f8fe42559e312388f3cc6b5a37c6ba09ca4d. 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/QZW9M2439527.