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 0x12ad0f97fefd6bf728cacebe618d8a2f3408b30d9a7ae991475928c41e57f9d1. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca6fc468-50b3-40b6-bad3-62b6ac229b3a.json and https://artists.proofprofile.net/proofs/artist/ca6fc468-50b3-40b6-bad3-62b6ac229b3a.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 0xdc43dca71572bcea31e221acdb37e6df9afda5658abd449475058344437c2136. 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/QZTBA2330663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b803e56e0f15427b936b69cc3c6e2a07e80d50e89c1a24d82c3f325bdf7541. 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/QZTBF2381932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6054e7bf61c4cbd08716537944e354b1349b694a3db5bcc03e63a4900099f1b7. 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/QZFYZ2475310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ad07cd5a9f828b3cdb916ad275ef16a549dd938fbc29e275e95ddaea6c37f3. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZFZ72495265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31725f6f533bab5bd0cda525fb0f77b849e49cc922893b85cf054551e4fd6b22. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZK6G2428468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19645cf94f0745d702810c52c56c689064ca7220c560d40b9d8456c9f0f1426b. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZNWQ2412120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ad52829c0b9f26e4456bc14ae0bd842e1a7acfb65abd757a936004bfd007ef. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZTAX2469214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a856b29f10c361fb946f03d7e7e64c6d561eacfef8204b19da0a34d5e4ad0c. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZTB22419194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681f371d18a367e37a1f6d4b69c310c3224653ea0e47c71499a2ae2f96503e97. 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/QZTB92454196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fd19c40310022007688a31da316d0cb02bf8819ed022491c00d28ea2d9994f. 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/QZZ7T2441362.
The Last Disco Dance (Definitive Disco Remix)
The Last Disco Dance - (Definitive Disco Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a51daeef0d477ea8cbbcbc5c05df6257a163a2e04250fc9a626efa18add7ae4. 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/QZES52599336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c8d29bfd5fd16cfe36e6a14f9acdf2c702a779dfa18f77f74a69d8402178b2. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZHN92565782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0753ed3f4ea1dcc40f951db55f663d04f03c308b064b32889b35ebf687915cc. 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/QZK6L2513381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813f9ecd27ef9ae0057ec796422a01002c58154870777d32f0968d843424bea2. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QT3F62557859.