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 0xd50a35b13bc3dd65616424092b12a38f60d10ad93ed6118c63f20eaf6254f180. 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/91f67144-16bb-47d3-9dda-072e13d560bf.json and https://artists.proofprofile.net/proofs/artist/91f67144-16bb-47d3-9dda-072e13d560bf.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 0xb6434707f6cd8383978417824fdc5229f5af31b676a183c6b622a39e6b795906. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZNMV2103330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef17260e81ea397082105e1721dfb40a89bbfc630539668bf85e636dd1a1434e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ62243611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe609068311ec5b87227b77a05209efe2aa8589eef50cede3eb41de73760320e0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZFZ62243612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5d42080425a6f6844abd35cc8cff9c9dd3f6dab2ee994553e5373d14d38933. 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/QZFZ62243613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc80de40300a6005e068e31384d35903422117a50c762b02b16c2981c4fe0d49. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZFZ62243614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf171c13bddab815ac14ef0b9e1b2f915fc7497082651e3a95dbdb307a3a2dd4f. 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/QZNWU2226992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7476dad1ad6d287a08d0b976dff48a72b07f1edb9e00ea903bfa766a73496c0e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZRP52227187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87cd0b6757d06042b60a5d683e92242d4e0f2e60bb488e8de1122356d61b186. 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/QZRP52227188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acc815d7fdb0b16018e7e021cdd72a5805fc179bdd15551cada3dd83c5a100d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZRP52227189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e59ceca0ddc060717a0200d7a9b3f4d2b3887e85cece12a8ed0eb9042db356. 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/QZRP52227190.
El Sinaloense & El Pavido Navido - En Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b1b2adb4b09a80040e67ac1e312bff29d9a5270c752a683418a65e9ad8b4fe. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZRP52227191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962690277111b24910383e39a9453025e4ad7a6f217c9e414c6f11855b34bbb4. 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/QZMEM2389787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88e2935b5953f34a4b09166f01d7120f979f4f7667179def80c21569601ea1e. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZDA42458794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4312f9471caf1b29895e78f493e12328305fb696b3650dbf9dafeb174c1514. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNWR2592440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1ea6d9e51c4530701c31bbfe3b4e92a1dfb5467d08b33f8b6534fea86ab8d9. 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/QZNWR2592441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652646879772ab1eeebe436ca376531160878b56580859ed31faba5cf6ed3138. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWR2592442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9d825c9dca1e2c2735048dded5439952b4e637bf949035b288eb5010521157. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZNWR2592443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b85499228944edc103373624348844a24e0fa5174212f97efcae9d791f65aa4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWR2592444.