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 0xf8ed0ad5bb80461bf5e9c7e7e19868e4cf96b2e8a408427c0ada36de49caa178. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3edc3770-18d0-4051-a3af-cf492fd20510.json and https://artists.proofprofile.net/proofs/artist/3edc3770-18d0-4051-a3af-cf492fd20510.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Willow Waltz (feat. Will Ackerman, Tony Levin & Jill Haley)
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 0x287a291ed7e48def2d0bf70f2bc257d6ff8092f73d8ed521de908ff87c869b58. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:07:11Z), 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/USVRF1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b39a4c5c10f3f47ad8eb052235d103bafc8c052dc3ef026a97aea626a2b05dc. 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/USBZE1200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ccefb06c0fc1a02992488b2307f32f5e193682fab97440501c811213f90f9f. 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/USQYH1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ad098c7b40ac680297e59d091041972f3f8b563f58651e1300565b83fba83e. 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/USK4N1200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a9fb3277e35557158aebd109f82cc5246c5b8ee7c9b1672f24b6b5f4302933. 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/USYR80700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904926c65f1cb2b1829e39aa71ac7189fefb1c5d719475b67351375198cb1e80. 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/USVRF1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac779d785b9301e1bc428bc93ac3da77095eff5eb6e52c359f91e3d2c05ee3f1. 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/USVRF1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fef86f9b023fa0882f59c787334b1e33aa474a0c2368f512dcd0d0e81721e57. 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/USVRF1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24eaee96c5d457f57b2826042cef4668fb3ebd2c0b73c73abfdf30da4502e55. 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/USVRF1200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d7825f5ad6a57751bb47a46aacdbfce0b2c8ce130322b6dd41960e80a1aac4. 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/USVRF1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710d9389bfad18bc79e5c9468ecb03d9a5372860369b1954c98b37a0d17e1d81. 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/USVRF1100007.