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 0x35b644fc713349419962805fa399c66440be381d662b11ab49bba3fc172871f7. 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/2b20884d-eb22-4932-b784-f788551fb6d5.json and https://artists.proofprofile.net/proofs/artist/2b20884d-eb22-4932-b784-f788551fb6d5.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 0xf704de06ae2c5268473887fb9c633f07fb385a51afd37a96333955072d790bc2. 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/QZGLS2023141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e971c304878b705e090a575b48482aef20dc7e74cedfcc262267ad637aa721b. 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/QZGLM2175904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4afc7085fc2207553e5623e73e15d47d49d195016334887eeb941731dbaef3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZGLM2175905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942936f07d4380060483c79d912a92b6620bf21808230d625f57229d1cfbfbf3. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZGLM2175906.
Popurrí de Polkas (Sube y Baja, Bailando en Camargo, la Temblorosa, Atotonilco, la Cucaracha) - En Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159ff0874da0b74186ec32a57eada89d678e068451e1b3065daa00ec482b246b. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/QZGLM2175912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7912cb4223184f517ac567ca0387327343e6356cdb255acd109a7376ae73442. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/QZGLM2175914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d8c554a1c8994c522e4d612bcc3c968fd04705274396b5801563c6796799aa. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZNJY2103258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28dbb692834f25286c8f6c21f88f3e901ad22694f022c68cd3e7570b36c7e7a6. 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/ZZOPM2117394.
Con amigos desde Monterrey, Vol. 1 (En vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe709df097a59751a374a6421437174362684ccea8a5403e8a0f56d237d0d00f9. 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/BK4DA2309057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919b2627a91883e9c9e4148ba9061c280262f2b32fc5e6d1683ff60dfa4c7cfc. 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/BK4DA2413711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab362ab76f7d95e9cbb0296155b82319445fde8bb3f4646f7a87d3209702b48. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/BK4DA2402930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fd022113290107053ce8a4b744409cdc9bc221938de72b82206c1b152efb9e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BK4DA2535277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f72384c4019ad1df0ba8538faefcb62b47918511a427fe4761c154e8c08d92. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BK4DA2545908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a5196edf730de88789c9781d59d3c3b6f87fea84c4e4190fa920bb8353eb26. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BK4DA2545909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08aaf371ed1d821fd36912a30b539fdb1fed3eaaa0eac32babfa76fb8bf7a8ec. 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/BK4DA2409936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbc62473830c6870e178efcea0087784fc1b4489cc0d2d9b3ea8ea2758026f9. 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/MXUM72300880.