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 0xcf600b57ab5df4efe9abe014b739b203eca67c3f4acfbf393d7d540719ca4f0a. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab80653a-4c98-4a4e-a78e-8d909d257911.json and https://artists.proofprofile.net/proofs/artist/ab80653a-4c98-4a4e-a78e-8d909d257911.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 0x9a6cf8076b27c1ec04167962ed80e1db4cc54d2be8dcf8d8e2f5aca603d0847c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEYJ92222401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa498a67411f746a8795ee814aca1ad61447ee0b9c2b6f881cfa821bf4e88aefb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEYJ92222402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11ed5df0b48e9b4ee701fb0c7935a40177f3600457510c112e4c74c16bd0249. 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/DEYJ92222403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d155e804684dfa1a2eeb019dcd14b62f9c4e6c6a9dee395e64fb1fa28fa70e. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEYJ92222405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc070f10e694a5c764f5090ddee9a8f2b763291064691c37380d055006bdf4c78. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/DEYJ92222407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b47577b527782507232345dd18e4b3f15a1db17e3f6f474e2d3044c5c640c6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEYJ92222408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf11e9518e56a59313b75b050ceafc9e7efeb494d7434b6077cda2e9dd39ea3d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEYJ92222409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830d593eea9dd916c3d44ee1ebd98ecc86fdf34ee0b7643fd59c31737db707bd. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEYJ92222410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e68444815a44aa53d1839217e431bd91b7b626a5135619938f03b0eb483835b. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEYJ92222013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6696d16ff91a8ed9355094f0765016573237946137889b6571ffb9946ff8ac42. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEYJ92221901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21983e46ce9754dac8095b709f326c78b67d2444e94e01d7b3e8a3019fefb5c9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEYJ92221902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed96e6480059aa6c6b268878e11ead5af429c72b73eb75db9313e5de06bd739. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEYJ92221904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b789416da9923b4ab9af6e3707113b1ff0e17bfd3a2586024db4f6d9c9de8d7. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/DEYJ92221905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499bc993970a4f6de2d3e2adac73924fcf32843d420ec9e7fa9ced1eee186d3d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEYJ92221906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6136d20614031cff2d25465fc20f64a1796d8f2f9cfafb83a803dba3a5270242. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEYJ92221604.
Classical Cimbalon - Bach - Haendel - Vivaldi
Game Show 1 - Themes - Tension - Elements
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609ad0d239c940c553494feb60abee0860375b43393f528d4f336e0368d87deb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEYJ92119901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b988d5410bf91cb3d8ad1c6d9d33aa820adb28d428ce44cc15379d81fd3aab. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEYJ92119904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8dcb222e08315bdc718b4e9bf2c95dc50a03ed49337d45216d16bed169f383e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEYJ92220801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684aa426681563d61e81d790dbd52e109716e720348514e96dc949f722eeb050. 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/DEYJ92221503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a8285f4311f6277a2db24202fba8a433949da6cf0311d65eadf506f3a280d6. 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/DEYJ92221508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe567e6f92cb664c623f8993c1de7af426fae2b4233961a6943b644fc462a79. 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/DEYJ92119603.