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 0xba3eee938b3e035d104be4f54f9f6dca8b5eccd63ff5560b7e69ad312f6a9512. 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/ef6086e5-181b-4aaf-9114-63ac4f9f2c77.json and https://artists.proofprofile.net/proofs/artist/ef6086e5-181b-4aaf-9114-63ac4f9f2c77.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Through the Trees - Anna Yarbrough Rework
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 0xf64a02c1b06dad4951297ca398e25d0ea83aca76318b37813b9df269454c65f6. 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/USLZJ2033685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a30af8592b447b5006bc46064f30ce443bd7948832029e7379aa5c9cb60991. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/USLZJ2130216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a30af8592b447b5006bc46064f30ce443bd7948832029e7379aa5c9cb60991. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USLZJ2130216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd998ba2cbe0fb247ec5e847d881bfc76cc717397364d394315299b8f3c56d694. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USLZJ2130224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb365b176dbc5844d6f893d7839848fac642a57dc3e8a5f1a35c5b007ef4604e3. 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/USLZJ2130229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4831fa5e03fe66121a98dfac386f55fa00bc68b0b78859ee2347f12d03c26ad4. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/USLZJ2130231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38b087d001ed0fce5f006192b070d41463f37aad0b21485c62145db8130032c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USLZJ2130239.
First Light (Orange and Mountains Rework)
The World is as You Are (Glowworm Rework)
Hold Your Own - Jameson Nathan Jones Rework
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e57c56d4072e702313d5971e4722eeba072284d9d639b50c2799f8ad709bcc. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZ5FN2216290.
Happiness (Drexler & Running Notch Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d15f6b1b914355bb4b4b28a4fcdd31a09d26b6c286d446a6bf48b7f8517cad. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZWDE2584273.
All That You Can Be (The Hillside Project Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d8677393f4de7881b1d859204dfbc5238893ccb9fb47e6789bd329a9502ef9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWDE2584348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06face414f7560ff543217a2b0d035ffa7b3122226ef589a5cbb4ea098a482a9. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZWDE2584360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6e473658ab89fefe5e4ded67115865d01d2865b4bef7418911fe5efa393e15. 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/QZTRX2299210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6e473658ab89fefe5e4ded67115865d01d2865b4bef7418911fe5efa393e15. 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/QZTRX2299210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3808bbdeb97a40ac7a731b071b503e7d60c9c59c54043b93f1347b7648df92. 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/AUMEV2424160.