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 0x7e74d43ad30f8ed09e0c15ba38d849c060e57f86a9baa97ca4e5323e478da6a1. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3503f2a-7573-4303-8483-b4d866cc727f.json and https://artists.proofprofile.net/proofs/artist/a3503f2a-7573-4303-8483-b4d866cc727f.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 0xfd25431150bb927a98c1dc10f79d29c7f1547c6d3f7dc1486cc1df32d4864de1. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/HKI191417001.
Suite Colombiana No. 3: I. La Canción del Soñador
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdbcf5f870cb55737e2a8298287baff8fc7c3fcc00ce8bcd4c791c0e5b44647. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKI191417002.
Suite Colombiana No. 2: II. Guabina Viajera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dedcb012ef918c5b73cd8e6cb0d5532991241b62dd239d6bb5020b27103de6d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HKI191417012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79d801b6a6a42c0cab0b25f55a8342784132d9af1edf529e1e133e4e11102d6. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USX9P2373618.
Para Evitar Que Se Evapore el Sueño (Pasillo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761b388ae8d2f017894f990b991a06d2f7dcc8ebe92c0fb081c702439c2b6b66. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USX9P2373619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db3b20e48f0d6f78ba2e42524bec1aabda5ff9830bd47beb75d54874990242b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USX9P2373621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b096b58790cbcaee882adddb44cb934d2bf079e0a85b4f3238e1a08140401e. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/USX9P2373622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa443b71629b2113033938144489c1a55ba806a1a49228d5b3ca5d9b65294aa04. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USX9P2373624.
Las Manos de Mi Madre (Como Pájaros en el Aire)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0e3882a8e62962549ba26a62ca168ebb538e76ce4f598f0d98b01ad4daa073. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZW9M2465695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96228ab307e676c82b4f513f0f21879f245d426e8bd705cc88257f66fdc123d3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USX9P2373551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91802068ce8cd11ca0ca8af5c2307a03f2f3b3fb504dc28ebbf97fdd5de743b. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM22174184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce21eed375d9fa19e85a1e9af662ac7b1bb27f3a486e19dfbb2b519c3573d549. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDY42181770.