A vulture is a bird of prey that scavenges on carrion. There are 23 extant species of vulture (including condors). Old World vultures include 16 living species native to Europe, Africa, and Asia; New
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 0xda8116aaaff543d0c3f88eb9758fde3b25a5174aa656ebcdf022670e0aaa907b. 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/477fe536-d5f1-4009-9012-6bd79d8d599c.json and https://artists.proofprofile.net/proofs/artist/477fe536-d5f1-4009-9012-6bd79d8d599c.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 0x09986e0d63d1aa2475cbe09dd9aed59a3895e3505728fbf71ad42474f0dbbfd6. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEQN41600113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660fba61c5a7b8ae2fd7a14c9452e1147b3f38cac8a8536dd7d29e058544b0fd. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DEQN41700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95958a10af91821d6f4f4de77e40d8c4ae615716f1f5c329f93818f736716c43. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEQN41700052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cffa9b8df3b6f9eba9445e46ac804d4c9fa3ecc7d05455f45d9d94e5730c3e1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEQN41700053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f1bcd439e91c04e79289447fc3b1a7ef0f3e836be0b51d8ead1ec5efa79c66. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/DEQN41700054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf895d31cecaffa521e46fe6b0eb193cb5db49898c981f9904937f7a0db072dcf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USMBR2114717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf895d31cecaffa521e46fe6b0eb193cb5db49898c981f9904937f7a0db072dcf. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USMBR2114717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec15493fa9e91a45904865b6d8866a2f78e4cafbf783b9548b287eec1dafdad9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USMBR2114720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fef26b1ba41b07651d11dbb9fd3ae059fe00dca8e2330a3af688a83bff83098. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USMBR2416138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87891508a564a29ecd49eac6b9004d7316803c11e6cba5aac4fa846d39973ded. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USMBR2416139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11889ca2ad3d00b504d69a6eea9e6ca9a9d09e66c379b8736104b830e3f45fb7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USMBR2416141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06c32f0e9267edb908e3568ec1ceb3422f9007755acbf3b54adc4a0164d2695. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/USMBR2416142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83d7dea0b28fef5a35fd9016818b558d18f8ed9750efb3942fbe1d7a5f1d962. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USMBR2416143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ca3cd9c78d9678c5a3f25dc5d30045183d1aa664e577aeb3dd3edd8c826b0e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USMBR2416147.