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 0x4ee9d525a46c37c91326d26a41f3c65e6999afa170f696c359ad3b7849414d2d. 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/43c53401-2219-4ae9-b5f4-042d9e754898.json and https://artists.proofprofile.net/proofs/artist/43c53401-2219-4ae9-b5f4-042d9e754898.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 0x46746c7a37f12eb442f582925174912549beba3036d7ec8f93465d79e4b51f86. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USRVZ0800231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c82133f39b5c35da0a6d654ffcff5a8f8127fe0b69703b475831e333eeb0095. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/USRVZ0800232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e3638c9904f7493d667be4a6b9309891c2a33686d8ee249ce18fdef8931bc9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USRVZ0800236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ea59d3285179bf412522c628551285d59de2d15a339b627eb4213fe7c5d018. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QM4TX1805397.
Malvada / La Guayavita / Que Te Parece Cholito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72574470f39c0dd6316fe960e58696b44bef51d29c65764e42e4aa6c85b3a6df. 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/QM4TX1890448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ee73f7773e49587f01d0d95205a13ff3754ad448b06038ec6e5c4ad370305c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QM4TX1890440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cec556097439ca0169342ae08b5a542e1e8e36734d78516e3f553375290321f. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QM4TX1890441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d94f9da70096cb0d1c3f666e765552ebfdb4ccf4724ac9cd97c7def7c3f5d5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM4TX1890443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fd3157148aa42c1f32afa525ce9a5c27ca0f9ff2f03658544348ae93e849d4. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QM4TX1890444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9dfdf04c8196eb6a8ac278279043dfac420d9201ca7d3c658da8c11b27c951. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QM6P41851242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46951b8ec9a241c9f638bab3604663c2513ac82c6471418a5183cd5092e224dd. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T16:00:28Z), 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/QM6P41851216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9907d8818aabd5828a46ce513ce4e6abc06f1818869c01571341e428f3673a4. 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/QM6P41851218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edc598c1cd45f44209e11c8c3051dc378280f669e6bf74d912b3911a81f6101. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QM6P41851222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55413b717b3fbc7d3be6f04b87dffeea473ef923efe96c122951b7f1351b6f44. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/QM7281706288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9394443677c5a7461c66e605d4854a9ba0b0c43d231aee599823496c5851a86. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QM7281706289.
Cumbia Candelosa / El Mecánico / El Conductor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879abdf92d211f7c704ad58f51f306cf7a285c6b5a8788424a257b42fa110534. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QM7281706274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cd9918469344823801cb3e922c61199fb25f0bb93ded36d66295b2912d4fa9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM7281706275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c599647e5dc543efb98fbe61ff4a8eb06564309f21117a7da0d9ebc32ef7191. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QM7281706281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d556018b545b957716bd564aa40e619d52c8dddf9eaec46c21b8671a5ad8c2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM7281706284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55413b717b3fbc7d3be6f04b87dffeea473ef923efe96c122951b7f1351b6f44. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/QM7281706288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9394443677c5a7461c66e605d4854a9ba0b0c43d231aee599823496c5851a86. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QM7281706289.