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 0xc4f6a18d41994258eab1a7492ea225aeb0425df1580d8dacaa6f8faa9f82a254. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bfbc9e15-4e89-4418-bbbd-d550bbbfa8f5.json and https://artists.proofprofile.net/proofs/artist/bfbc9e15-4e89-4418-bbbd-d550bbbfa8f5.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 0x1714ff996cbb1e267b84c08b9e8f050e0175e46850e6dfacfe79a0e4f5748cbf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USLZJ1465205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5b88fd56a78cd0e5a4623967cebb35585c8ba697dd468b18692e930075c97f. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:59Z), 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/GBSMU4262886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43d5d1639837528706023490663b0e00ef2e87e4a26fba3248e499d9fc1b218. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:57:06Z), 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/QZMHP2073054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf617c6a9f3074b214ac75eecf2af4b4db89cb4a8041ed7d053b2976d1e38d104. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZMHM2095867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b30353f74a119013a0662f8752112cd3e474f620ee1b072066d34ea269b052. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/CA5KR2324607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2cd74905410d09536f76529b61109d84deb5ec5f1d6e3a22053ac4fc385abc. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:48:04Z), 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/QZTBA2475257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0efbda1a3801d6fc4007e9ca219e6772a3e43f4c68408d62385f144bbb1eeabd. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/TCAIV2422768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe169c7e53fc1c36d3a6ff94998273dac78ae8a6f12d7e496545c17bb33d258c9. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAIV2422785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50e63b3b9ccde634bb4d79dd429ea2668a68e8928c719f13cfdc2c808140bce. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAIU2422795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebbe405d624bed9f66548cb1861eb3228a2ae86d32ee5f3e8ea1fa31cc24bab3. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZFYZ2569913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3133e0761e1ab5b0bda4a9a373bd5165b0a435d991e4c0f349564bb45599265c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAY2586309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4ed2b456fd102d68afb2df049672f3ada7de36259ddf9f3f3df1bfbf48ed74. 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/TCAEQ2003931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13277858cdc892e6ac2a39d218cd52ba6a8708b4bd54c6590e387c084f53cb21. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTRX2474418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608cf07d10d37245578fbfae426fe803b39034692ae1df31dc2671b6d13e61b5. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZ5FN2010412.
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 0x79aa58969aadda968ff81e6e8a05b4d35441f19ed40b7b6057a7c11a3e9f5d2d. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZHCR2000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563b6a081140e410e1b3d4e3f14b76e0ae22293a4707e019ebdf6f7a192d6697. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/TCAEW2018032.