thumb|upright=1.35|A greylag goose (Anser anser) A goose (: geese) is a bird of any of several waterfowl species in the family Anatidae. This group comprises the genera Anser (grey geese and white gee
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 0x75e5d8e53a5ebb8e04233d432e5e4736e95f9962332e71ec1ebe9b792887b592. 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/e54ad364-eb67-464e-9267-8dcdbe20a3db.json and https://artists.proofprofile.net/proofs/artist/e54ad364-eb67-464e-9267-8dcdbe20a3db.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 0x26e3d519dc20a2d74073d46098c26d15a3f257bc26117dce2ed237d97c760fa8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM24S2100741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7fdc976a6ea9f9f76101ee28722eb604637c9526dd30b12a5b92218135d8ea. 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/QMB622317001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48f7a882a664086cc880d52dc09bb1cfda8c53aac5b99ad7ff251880717eb8f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMB622317002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20e73667d0f625fa4fb35af49d2ecde611db54b53b6ae580ba8b450cd9b18ca. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMB622317003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dec445137c76220ddd767f5a714b35194a700b4635fc92073f9838e70087419. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMB622317004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e8d30b1d03d73f71d41ba89deabf7fcba1d217bfb12164d841e81125bb9f18. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMB622317005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d02291fae933f38eb9418b66a541823c488a269ad4d6a227377e63e45c596e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMB622317006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5194aaa9db98c8bfd6131b5d689fc0da6be0c8fcadacebd9ed9a65d8220e28dc. 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/QMB622317007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f2b9717eb4d30c076564daff526af554873af0df2da9edf257dded307621c4. 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/QMB622317008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4ef79fb6a3eba5baef4b47504f761aceec7b1b269f3d88702ec57e9440e77c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMB622317009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3503b24ffa1790db6131b9281a3b8713d6b016b174acdc410ca1ba82a980c81. 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/QMB622317010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935a401669f9c10c0dc0339b787661a075ba388048ec46dcd7786dc9ebdc4d7e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMB622317011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3a977e87f143e60e43b23645dc53611e2ab51d2f8f9c9678c1a708a5fc47b9. 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/QMB622317012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89356ecb24499828421027716001d0a53fa30935e769da6166595f20e6637414. 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/QMB622317013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa980446f0815555d796960e930cf2f79224c98ca8cf55dcf7f3f529dd9ac68fe. 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/QMB622317014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28a8f38d5e8a0249f690eb6bcd3401909fec05609714a2d587e4a9c85af68dc. 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/QMB622317015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb417d1adcc2038c42128410424d234606657e77192c9e4cf041808711d437a7e. 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/QMB622317016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcc32bc07dd0838808954a7c5999a4d3c57ba684fbafac66d3ba09f8393fa88. 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/QMB622317017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f1cd0725de099d66660788a11f7c6609bbc9cdfd7c723bd71309c45b148856. 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/QMB622317018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d90ca0d984d5f4873061a2769c515feb1176cf3b244637867fa77cc411da9c0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMB622317019.