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 0x71eef8de83a30b5dcb745456f14a52196f33e8b8be6b8fff82a22b5c34075c20. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/676ed9cd-3064-4ede-8ba9-85a62d1a9c99.json and https://artists.proofprofile.net/proofs/artist/676ed9cd-3064-4ede-8ba9-85a62d1a9c99.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 0x84f33d6a15fab61f6990d4ebc02298144de55f91f74981d761fb4b7ad174a2ff. 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/GRLP12122066.
Sex & Technology - Mikey Barreneche Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6edc9b43f2368de925c895b049fac04c1bc25f1d14ef4445c245941d6d51f3d. 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/GX3Q92018124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d285da8d02d0ee2d3dc14c79fc9de4e00d21b55b77d6108b17f4dbce6701d3c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USNRS2543925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c0c66c5a45b553ed39d051a82db7eba45b5486e96eae0ee3d3b1c2a5bccad2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZTAT2409747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f977630954145832b0f97b6f56381ae5e9f901b039a5fdf4678f16e0bc63e4. 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/FRX762235609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613e6eb812a83577403480bd738e39cd36cb4c70c94a3ef1bf9a2cd7700e7f16. 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/CA5KR2210614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ac4e2abf66a04670500c6ca95d0f5358367225660a3b5ae31013c407bc617e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR10S2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ef99e6ffff8139c54438c2263a3b90fe4b36db21a1009dbcec707c5d6bf50f. 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/QZS652479680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5d4eda65d3eef596bbc45dd5e6fd95399b29c015b4060af9e65986e91ee683. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/CA5KR2305410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4f9f45045bd8d2ba5180e8cc1fd85ae0e82dd1449cfe51b430491b5a8e43cd. 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/CA5KR2305411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a56bd28d303ce63eed62e168f5a2bfb6e291ffe1ddc27557eec1a2ab1e15d0. 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/CA5KR2305413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913d1226053fc34f522db32cb29e6ad3406e60f8161cc8680f1a7e533246a9c0. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CA5KR2305414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c00dcb703e25899aad3138265600bb8291c0f3712a5a686b16b4997d5d3415. 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/CA5KR2305418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32671c0239bc4c8c97aa4023f5780d4aa83930ada120e65704d164c9d56fb77d. 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/CA5KR2305419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b849f937ec900b260af30a6a4cb5df6685251b896c4ed7cdf4b9b6cc4c792d8. 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/USDY42125195.