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 0x990b78d9991004856de3a7825ed994bf545b456c9a5b26d8369f9842b806818d. 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/7706a644-f440-46aa-a09d-b904266b6b0e.json and https://artists.proofprofile.net/proofs/artist/7706a644-f440-46aa-a09d-b904266b6b0e.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 0x8b74d0000dc66ee7f1f4cb47ba08d3fa816c846b5ef3d45f8e43aa94dce2b815. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6N2480038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92f3dba237b23eaa9e2309174d8a9e3be199f2f3306e4fdaaefb2b891d01464. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB62408328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab327ca63aed750a80c6ed6552ee46e079d439dadeae245b38ab879553cbd06. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFV2411074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd9766060533be6c3ff9e7c7e3b9b655a3feb94eb1ab75fdf185b38a41dc4bd. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZWFW2409753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945466465ee2c1f3eb8952777032671f0ff16796f5be50b7558f2e527c268403. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/QZWFW2412804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6304fcc22ce47442d90b9d664a1ac65b84829691def65b06dfb7f369f46511. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QT3F22420073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f10e8b4d08070d8e6256697afc90cbaf7f276a37f05e78fdc1033a79e3466e9. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZTBA2471842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69bcc681b722dbc8a613bd17167daeeb95e33bbe055c6ac714cb30109afcc50. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZPLS2488273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b74d0000dc66ee7f1f4cb47ba08d3fa816c846b5ef3d45f8e43aa94dce2b815. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6N2480038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be1ada355d4e462d176fd95b5f057431fddef93eb0098e007356c4c001107e2. 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/QZHN32509530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf21e93daf533886747e421155d45b53de372b27d664ec385faf1404bb8f736. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QT3F32477221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2096cdd188460ac21c9e4c9cb899e2b9ced29b4b577a98da53d4039817ecf3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFZ22574320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c33513f57a5520a81a50c59b5b092f2d326ff4fd305ccfa1fe2c7a0eb0b963. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZES92565001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd62d9dbe5d8c4b6b025e54099264fbb14593261bef1fdb834c54e6e8f2e4db1b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZFZ22574351.
city lights never shine (slowed + reverb)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7ee68bf26fe8bcf28f1a2979e5b2c4c115d070811e60a55e4091b9e2caeb9f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB22566908.