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 0x66a3c3296757ecdb455f34080ec1fa6a9eec344f920c3216b9f9a0942c416eb4. 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/8a220ddd-19cd-4f2a-85af-fb417217adc3.json and https://artists.proofprofile.net/proofs/artist/8a220ddd-19cd-4f2a-85af-fb417217adc3.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 0x7d0c94c5bf58698656cc9d53e8f18b3b13cfe1c016254fbc563ebfbc775b6e60. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZ7R41852546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bf9be10a88d9c816b8626cd996a7a49b87c931b26fc30e9b1eaf1230454b84. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GBWUL1904101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bf9be10a88d9c816b8626cd996a7a49b87c931b26fc30e9b1eaf1230454b84. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/GBWUL1904101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd588eaaaed4b04c697183cb6864f32e824faee014e201d58f58365642ae5ee97. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBWUL1942589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e989230a0268a69b66e8c805850314047b0d67112d3a9c3b69ecb087f2d950. 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/GBWUL1954232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd544119d5ca64ad56bf5e235c185158eb969f51ef2a3f2cf0a59a909f685a6. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZ7R41853083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2308078e11e4c2fd47e90c3a365fd527d34765018f7fb529bda4b4de8e06d945. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GBWUL2068373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cccc490eacccd123ab75772161cfecdbb15d2b1a4cd47a2895f3ab4517f76ec. 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/BK4DA2510568.
Levanta Tu Bandera (feat. Yessie, Danny Marin, Mr. Fer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3b662b34f611e884eb5dd7366ccece27eebf80e2089b7840007ce78090ed75. 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/QZ5FN2084406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563795d5928c3083c814fb2681dfc6c1079963c6bb5994a1d51d2b02721d9d23. 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/QZ7R41950501.
Buena Vibra (feat. Ale Puga, Yessie, Sunday Funday, Pedro Cuevas, Hancer, Stephanie Zelaya)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8f9afd683478f36281841d7a85b63cc24841283f7b1ab324625fe7d26c86d9. 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/QZ7R41951855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140b46d46422928cb02f68b6ea8b890696dd95948d41c0c6eaafabcceee706c0. 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/GTA111900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b57f1ee6694cbf6eabb7240702463f8ef277ad7b05566c597d99d81040f279. 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/QZ5FN2129533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bc3d84c08d6c14594d550186537a3b6ab65b6cb31014a546dbc1bae972070a. 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/BK4DA2301914.