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 0xe3db4400725151193a05e1a1e75aac95f0610c508ef8664e2b5896b4f4369d42. 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/e5ad0add-ed92-4669-8cba-2c2ffa016d80.json and https://artists.proofprofile.net/proofs/artist/e5ad0add-ed92-4669-8cba-2c2ffa016d80.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 0xcb62bc3dbd8233a034c1ce57219597ade87826a1c114c18b36bd3b09dc3db92a. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:59:02Z), 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/QZS672266907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ce2e7786f35358687c3581a1d96124c8e1b4b8edba50b9e78d1a63e5852e84. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:50:52Z), 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/QZTB22395706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcf894869e29ec2f42a157947f43477011eb0611350b70c3cb911d87ba14334. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:33:26Z), 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/CHF032416403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46689fc6c2e313676450a3b12eb7675f796001fe627c04d017a1ff855986dd6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/CHF032420724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37579e734b17fb9ff4b15e8444f378a2c05336a075962ac9ab5eb5bcd34e0fb. 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/CHF032501902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793019953ee8d8c8d087ce0ceaffa286ed0945b3df0fd301258bed517cb05d2c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:10:53Z), 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/CHF032514016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67fd35730a506acf7474ccadac5ae9650e7fd3f643a851805699eeda08f168b. 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/NLRD52266024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51ad0232a68d99b7990397b91657fd0c646837615c48cc9e51b4feb72ee108e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA062447030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f0baba1337ad1e4d6a72e9a57a0b3943b22a2dc8d80bc5ce86b0147b261e28. 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/CHF032412824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edfa4451011edb86d3efc9b97b9a10d9559fad2df27d206d2dd45d953f50218. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/US38Y2507427.
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 0x29ac0500f48c28e645c0150fb4c9c5af50bce868df435b58b677e105d796b061. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/INA5R2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ba5e2362143c23b4b283b331715f1ed94783305c651f2c80b6ccb2be1aa675. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CHF032421015.