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 0x5a27ff0096cb0a3bef434e149a512978bc7c8fe7b50826b2ef9f7db640b47595. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb427051-df52-49f5-a8c0-9ca60858521e.json and https://artists.proofprofile.net/proofs/artist/eb427051-df52-49f5-a8c0-9ca60858521e.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 0x2f429271bc215e973af2069ca7660e186311db5d8c589cd970a18ab96af84ebf. 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/QZDA61917380.
Kitsuné Musique Mixed by Sasha Rome (DJ Mix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb7beec5fdaf0993e0e482b8d6067dd328617acd6c905212ac4d845ae665e51. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRU702100198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b2f5a6a347c77b7885d79cf03a215b9a499bc0a540dfe21c59541cd15e392d. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/FRU702100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb32283ae4cd9fbf707fc8620adc16c275f599230df6bd7725eb3110f5edf448. 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/CA5KR2257489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecd9fcd053ec2ffa5ba4fd1d73f5ca9769853521dd496060e4e33d3c5b15c66. 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/QM4TW2443192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d7b63ddcca886106d1f115945ec6e023eb94a88df2be54c2b9cba626e6b26f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTGW2403103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6b011c1e561118a4523ac28baa3571a1f5d646cca5c2865dc4d53d80e31f40. 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/QZTGW2403925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ddf5e9dc97dc8326cc33429cc64eab3ee93019389fdce8d5101d3ee4229240. 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/UK9AV2501562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb97f75a2abc8bb60febd4ae3ed183488c0a327610925c8b18601360f697338b. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZTGW2404702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc091cfbeeeb9c6bc38cfce1db80ba07324cafe6612033ddc944584b2f7281b76. 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/GXE2S2500023.
Blame Me - Supertaste & Sasha Rome Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x073f83664d02fbd44657f3a3bf03b9b98ce011c17431fcea0c02b61aea0bc6de. 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/US25X2105889.
Future Disco - Poolside Sounds Vol. 11 (Mixed Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfa9953854c5d8270e63915019384a46e0c801707688195ae44db1e802bae9d. 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/GB6LY1601551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ddf5e9dc97dc8326cc33429cc64eab3ee93019389fdce8d5101d3ee4229240. 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/UK9AV2501562.