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 0xc06d54d09645a44536474dae42b5378d73fb31945311a5177e364f7617a01d36. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c70e72a0-fb36-438d-a03a-8d56251846b2.json and https://artists.proofprofile.net/proofs/artist/c70e72a0-fb36-438d-a03a-8d56251846b2.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 0x72e3ad6da3e6bed7f4e0b7269a901534b43018c46f32562370a1303e3d1d266d. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:05:59Z), 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/NO2KP2302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3cf77af32694ffb2e4ec5d56da129d9a781b1b6a58dbe3be787b10fdff0f18. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA82410513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab4adc7804b80119c41bfa5f4f7f389d673a1f673ac05290a5bf9e54498d9ce. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZZ7M2435633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89c8ad3fec30ad7c8a22d8d0e843737d2470d9aa3f6c07e5d9c564e68be39706. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZZ7M2435634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce82d1f7530ee7bab4d9391e10d50a7e600b5ec772abfd768580ccdf47af6f2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7M2435635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862733a91733af66376a7c24cc523a5b9ae0ee48f5decd229798acbdc8395587. 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/QZZ7M2435636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e9e53464641435f7bb9e75a439242db2555f42ca904a92693aa4a6cc1b6b844. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7M2435638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2d8936a6806971fce42ad02e667ac79a669f9ddca58804ae72c10712805be2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDA82596265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73d27b9426a429c6d8e02b0f25c4857cade8079bc60c56b1568ee626a5f3498. 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/QZTB82393395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126c4630d4bd301ec5403f0c504c3b627651ec37babc9621c077c81c0d1cb9d1. 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/QZQAY2432846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6188107ae193193c42b271b1a2cc6b11c811ed84a8d2afeb72544506a7490f23. 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/QZK6J2451744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612ee9087703e20e332f7b6e969f443dfad6b17b985d0b02a48c29b77a35d29b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB32315484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853d8b07ee00ce6719690e37c28b9af76d151cd943ccdf651d6e94c73868d1ab. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZTB32315489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0960eac6ef1ca70e3efc76e3d495a51c5d15ebe810839f8209473a6a210e22. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QZQAY2442604.
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 0x2142c7f67cfd56707aea0c38ec355645aaa78f89ae93769db979f8ba2279e71d. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZQAY2471525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca131344395cf5738a6ae21365e50aa718895111caac7abc7b0da85047752461. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZTB32315483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69acdc0dbc79e8df92aa108d7ec8d152b9070a13c9ca20944bc1deb5963b3cab. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZTB32315485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce336b650ff2f4242f150393ef64e06ea4f9a1544cd3adc05b8e867ee5cab5e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZTB32315486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123b304d5c74a40539a935c58dffd771f05c07465baed7de202009441c208a10. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTB32315487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881b2f9a1d4d091a5b131dab4c16616cde3599ea6668429585cba3dcca6da8d0. 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/QZTB32315488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36bd21e4688ab1af664760e3fea3ba622d42d54ec8beb14b47ed77884adb7c2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNWR2424360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a47d5301248866336025d355c85eef4d7de277341b7184091fd319c452a5154. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZNWR2424362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64367a0993e2b93d4fe75afeb1123ef0dfd8401fd885fea18ddf829f1499b631. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZHNC2466985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5207a72c12794f221f8de8b8be32db287c264c61afbe57f3bab4dc7f19536ce4. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZHNC2466986.