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 0x56110250400ffbce3c72cf3fb871d9a076a4b21fd16732e273937fb0a5550c1b. 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/f63426ec-8fad-487a-a57d-bd292fc0f639.json and https://artists.proofprofile.net/proofs/artist/f63426ec-8fad-487a-a57d-bd292fc0f639.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 0xdb652b9329c4930f47504d60aec3e538cfc5fac53293746b53d86b786ef2a16f. 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/USBAE1491132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dde0145d07f2bfe7ed9225faae347cebec479efd1d83aeb23c7c3825526206f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USBAE1491135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8f44cca489eca42f48056cfc095c0657ca25d1e59ed7b6cc758727001508fc. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:34:00Z), 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/USBAE1491142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062e3c90a0be1fa76e06751ff84ce72b75da4007ffeb121519a1d707c6aa7321. 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/USBAE1491119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6f75a2091b011d63325eb7a5a04e08be2f0974f7e946fe766bb136a511cc3e. 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/USBAE1491121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cfc804c72d96b4dc9147b7a9e75747a811c221e7036336160604c5a2b2aabe. 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/USBAE1491122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0179a90750403f8b1aa9d8e76b1d02c299f7007ba5eef9f8ca98707a45a123ea. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USBAE1491128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f9ba89fe6cfd6f7c48b228e958c7e4bf2ad390410dac354369df02c49c8e33. 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/QM7281458039.
Popurri de los Bukis - Me Muero Porque Seas Mi Novia / Mi Pobre Corazon / Te Encontrare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4eeffbaeb94fc6ea4831c4f35e4c7a901a492a5a9bab9a577adc4089431380a. 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/QM7281458040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6311b3168517f3c61cf3285bb6b1873796317fa7b8e5c13e6a047bae7e420636. 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/QM7281458043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9839087e8c4ee374f93262617758ed1edc414e9b8c2fab12300821ccd06c37bc. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:05:58Z), 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/QM7281458044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6dd1c3dc20c9881bd013c1fed08b5cfbfe68f61250c711de4aaf2f1e031846. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZDQH2163964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfada96ae8e500e1affb3792d2af71251a397ed48aa7547baf1e854c28e7dfaf1. Chain 2 (Bitcoin): anchored in block 957622 (2026-07-11T22:55:42Z), 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/QZDQH2163967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546782728860d5efd19201cfdd36cd9360f640675eefa21d7416ef342c5f5a71. 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/QZDQH2163972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050f4d1f4504b97daaab60752ce58a8eda3c6737a9138089765fe8f96e4596ab. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USCGJ1506872.