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 0xaef0d9d40db5449203931a4d03f5be8cdf7057f7134a3fcd0c6334e33bd6366b. 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/66c6116d-d623-411a-bc66-ee2d88de118d.json and https://artists.proofprofile.net/proofs/artist/66c6116d-d623-411a-bc66-ee2d88de118d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Classical Praise Volume 2: Piano & Violin
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 0xea60742c3714f9648f1b8819cc4548199744252825922189d3fe15679462324d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMQME1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0deab5fa1b4ea26de1d5a1251cb3236ede2b932cef95ad8a38d29b53e15915. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QMQME1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a665d58fc0dcab13188d47317fd3448f14acf86d82c4699ff78a68836d8e711. 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/QMQME1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e32221ddd8a9af3dadbb287046c59fb2f160af6d7b1944c77253c5a480e671. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QMQME1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a5f4d683d7b84292406786e35b7786b837037ea983b84b6fd269028990541e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QMQME1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc694b6c64f2de0c6b126c3503c06199b12c1179ddd1aca7e99c2f47323304eb2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QMQME1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4456fc22fce36ffc6a5eada36c164e7a7dcf72a6b141883cbe45d827df8176be. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QMQME1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe44c8694f3852852dd6652a927f28f2eec060e442f38dcc212290d5e8344561. 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/QMQME1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ef7d171d030c97474195fd8a048d8c784b9a654e16221dae58bec98f20df7a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QMQME1900012.
Give Thanks (with Pachelbel's Canon) [Cover]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eeb886da6ffdb89e12fce10888f5e209a566ece1b8e2c16a27d1ae29af8ea93. 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/US86A2400431.