Bruce Duncan "Utah" Phillips (May 15, 1935 – May 23, 2008)"Utah Phillips Has Left the Stage" , KVMR, Nevada City, California, May 24, 2008. Retrieved 24 May 2008. was an American labor organizer, folk
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 0xbe5315dfa81cbac4ef23748e7f1541eb9a91f9014f39131981a330ac536c7647. 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/008ffaeb-bad9-434f-a8cd-bcea7e4dcd79.json and https://artists.proofprofile.net/proofs/artist/008ffaeb-bad9-434f-a8cd-bcea7e4dcd79.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 0x1b1ca530bccd95932155b5026604ef8f6ac9dc2e2c037531983dd888eb76776c. 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/USRB49600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d748981f8127839d2e8921821a66f79b5a9142913f28ef9ffb19b3d95e9a2e. 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/USRB49600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d211b4b57f3e9b7f57f93f058944d9d695fc9228d98e074dad0dea57558afa. 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/USRB49600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe244a5bbf9f34c46c0dbca67170b09438b4c385d24947ceaebbbebff6bfb17ec. 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/USRB49600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295fa1c496f4a034d8f768d13e6da821699971893456b240dfc12af894f81d91. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USRB49600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b35b8ea0079b850b6a6dcd269b74df55766a55b4ee82a7235b4b0ef8d9039b1. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/USRB49600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0741613fee4245d7d73cbb09779fa8a42b9764b9b22737811755a5e69c4f1429. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USRB49600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc5d07f338f5013ce3daf31ffd204140aae8c6564a84c9c79f1f17fc00ec73. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/USRB49600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0493d867293b6ec40393fb8a5d60fa68bf4944cc8b2da913d7a9a1dbe040e99c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USRB49600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4d3e8f694be877e6d794428b360be303e7dacf5c03f5c540d0c4627d4e23d3. 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/USRB49600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18daf9739b4b9503bc0a02645276e8c426f3fe3f6202e90231aff4605e10d7e7. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USRB49600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212a5e61cef7a3292c3c9876509742abafb51bca7d6cd5d528203f989a83dc94. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USRB49600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a8fb389ec5707fd19c9f2105402808778f568a9cbbf6778302e11171b3b49b. 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/USRB49900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874d7f4e4a1263bdfd0613903beccb82d09b74f22d41e4af4d9de7ae633fff1a. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USRB49900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42e6941ae6ca418863a0750e87c3451ed96c3a22b3127575b6789ac316097e3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USRB49900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef821895e63a8a35a3d3d65cde55d97594037cff0729f0dbd679b1b6d830a22. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USRB49900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5646e3c3b67e430dd00ecbd136303051bcd7f8a12752b2d7ffc90f8c498b7888. 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/USRB49900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a3f7a749e00be0b80c4611a78299c72141d2cb85b94a4f30b00e5958dd93969. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/USRB49900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa779a32072d7cee6f807384b0d4638c5a2d101a975f406f73cb4decbfc5f0aac. 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/USRB49900008.