thumb|upright=1.2|Ulluku (Ullucus tuberosus) tubers Tubers are a type of enlarged structure that plants use as storage organs for nutrients, derived from stems or roots. Tubers help plants perennate
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 0xf80e31145946aed92b1397ed7100e0a6e227d391795da45fb8be7f41c9516488. 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/b3712671-39f3-4f21-a9a4-cecf80868120.json and https://artists.proofprofile.net/proofs/artist/b3712671-39f3-4f21-a9a4-cecf80868120.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 0xb9d0e570f419a7598ae15ff52c8a54ba6ea6ec79a01f77a7420ddee52b2fbde7. 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/TCAHO2379557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6921380ebb48959871046836c49b4f75c197c9f64012e86862a08c21dea4fb54. 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/TCAHO2379570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3c64bdbe7bc9e03d362d8c7678f5a43f1eee4912462347139e7a82cb4f946e. 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/TCAHO2379689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccf59a428aa87bbcbb55069ef439cd971dcb00e16a250e6725c29ccb066454f. 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/TCAHO2379723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9da9d2b83064082d36e6b3fe9ed95503b1f0dd9a998ba5ec9f092c8ae02264. 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/TCAHO2379732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a03c8894dceeeaa977167a3309f78ee82bdbcfc5f7b29262e581e51dde53ced. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADC1732532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77892585463283e495a3d73371767dbdb1129a14a3cf24345c379cb2e0a15833. 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/TCADC1732533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654b7487c8e74880905e85eb9e0887e241eda8c140456780fce506e4705a3224. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCADC1732534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e69d514f0ed792632e7740db53bb99dc003ee7dcb7ea76be22fc04934ff268a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCADC1732535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9ffdabe9cabde57d9785bbedbeb2dee3db403d6405b02d2257d67aef8ec92c. 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/TCADC1732536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b651ecd30bea0732dbb4cc29861c0ad61a189c5f2d886e8e523f0aa10c97d4d. 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/TCADC1732537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822c528988b389521bf5f3626b3ad6b39a607ced2d855e37728bb0f9e2825d21. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCABU1404336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e1eac3dc31c1f6eaec29e616f597816520369317380c883c306cdf152d4deb. 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/TCABU1404346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018670a46a01041cc76ec811dc7657b75c6c11f4ef9c103c8822a3d54f94c47b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCABU1404348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d213b1df736e18a31ba4c0291fd1fb3e77b8457557836815561dd5e90c60842. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCABU1404349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0b391e6932935333ef0c62d0fa8cb543abf7520fd2f14c63d90ce849cb758d. 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/TCABU1404352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35945bcc09bd7f514432f5ed2e02f6dd07bcb7648981666da147ec6bc893bda. 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/TCABU1404353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e02ae498480f7ff09715992190f278a20df6f3b3e24195fcb627523964c6301. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCAHO2341557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d7921ee8d2079fea9e184b0e7b835645f215427818716378976d38dad883a4. 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/TCACJ1506545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6735ca2f6a71b66dcb4f2a16ab4ff399ba17d2e4ab993f43b0c4c3ac3a4a11f. 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/TCACJ1506546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee583ca13ddc5c759d6befaf9ed4ced6af2a0995232450c070190a484a241a77. 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/TCACJ1506547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52617e748bba401b74fa162ebb5176dea5ff06fae0e36a9e2212259247a1442f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TCACJ1506548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03244e0a9e07567214f4d1b96aa75fd9a7f13cc4930e828f16e7c468a0ec71e. 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/TCACJ1506549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5098fb7d815c82b46a5d222a0e1c9dd8355cf4cda2c89013de6d76df0f0f66f3. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QMFMF2333105.