thumb|Cover Mavo #3, collection of Machiya City Museum of Graphic Art thumb|MAVO Dance Mavo (often styled MaVo or MAVO) was a radical Japanese art movement of the 1920s. Founded in 1923, Mavo was pro
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15af45707a010911513ce526ab78c9d67dac72cfbbf851af76de1c1db015f7fc. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3c67661-4c76-4215-b5e0-01052946d8aa.json and https://artists.proofprofile.net/proofs/artist/f3c67661-4c76-4215-b5e0-01052946d8aa.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b086453258d9cd17bbcf52f1e03027520ca3c792d214404f8a60f12b740d16. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:43:23Z), 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/SE6TI2113101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e93535024c6ddcfa5a2f2afd38ef90aa9413335ba85d192d77074264ab2bb2. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:26:28Z), 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/QZMEP2508480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8f7d504e196dc37f04a9351d071a674996e8decccfe9905a80cdfb09a274bf. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:03:42Z), 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/US3DF2549204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b7c20036dd31dc7ad8dfa5d3338088b6d2c83e865d111821388ac43dd31cfc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHNB2056802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41550a099a6a6d3c3dd1c4c3ee028c53ef970bccb5eb43981f65bd1bbc792c95. 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/QZMEN2458288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a00ba637ce8f0620dca3c991e4839c94f681c40ec4ee82fd47211ac2f39285b. 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/TCACZ1792363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96412d3083a6c01993e3fc5339fd36521c917a62403db868c6e4de559169dd8. 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/TCACZ1792380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b256953c355777da94c69160cbfdae8699db9089e2f88e6dd778e7177952ac. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:30:05Z), 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/QZTBA2480409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2aa24fb902d2e3e241520e9da55f4ec5b4d132fa63166d30502d2252e262ca. 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/QZTAY2223552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3af0c9972b8fa7c7579e794259a63bec32dbab06ddb2d62d14a5c5a2159402. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:42:03Z), 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/QZES82001401.
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 0x8e655264225b19716bd2b0772c37f682b6eaa4e2927fbde4249570b727dbee08. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFZ41941401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0056a44d9cb1210b75d1f7ffef73c3166ddffb39e2b8f257e1ab923a92516367. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/QZFZ52068528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d55220bfa3d460f795faabb356974936173403063eea97b0f4c942d12dd9aa. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/TCACZ1792370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98bca7907166aa9b807c810a1835a41d12b0d0ace672cc56789b2fac3587efa. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/TCACZ1792375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c18cb018138dae17d9b6d56c6a7c2deb23d586d5cc4b1615e96b4d60211c0e0. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCACZ1792381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd95897f18a8fdbdd08f098efb24504954ba914ff47b192ac386d9917d59d38. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCACZ1792384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c34fae8768d262f9347cdb9ac5dd2ae04e5214e1a8eb668a2232afbfa70f52. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCACZ1792387.