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 0xe89dabd9e0494901a698e3b73260ff30dc3168c2288d7ded2f89790333e08569. Chain 2 (Bitcoin): anchored in block 953780 (2026-06-15T12:02:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d4ecdb46-9038-4cf0-8597-a9179e8b493a.json and https://artists.proofprofile.net/proofs/artist/d4ecdb46-9038-4cf0-8597-a9179e8b493a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jazz at Berlin Philharmonic II: Norwegian Woods
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 0x34fa032be5f7bc55c58de27766089f4590035926230cd771358402daa80406e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEA891500095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad24f46083f68b99cb508f0b73d3389b84a3d2d1922ad91f64cc0e5e60ff6fd. 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/DEA891500096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68130ad0ae4fbb03ef5ca80406bc6f9139803e63a843a07af8fb889a5a1c1881. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEA891500097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d2f842a3c4131f6379efb2ae75f87458c240788319ec96a472a73e9d89f22d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEA891500098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9afcc60df8ad2d1c1ee2668fe50ac1db8d11c5f02a29caf96b7735cfa793d36. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEA891500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9319d6957f8fdea8a0f4165ce01e85e03eba3cc6252b6e60b8540bac96c6b2ea. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEA891500100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f62bdf058981734cf642cd1f4421134c972c6ecdb921ce4a7f54c82be0dc25a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEA891500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7b63cb4a7708d4ba4b68be6023d4a8989c10985f1d0da9b971c8f72c74cb01. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEA891500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc4cde3df806759ebcf021b21ac1ea91ae76ba13e205e4705bcf532c8ae0323. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEA891500103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96eebf56dbb4a8475e2e5e483e3593e4fbb347cb8838de92076b9e24e666d36a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEA891500104.
Jazz at Berlin Philharmonic IV: Accordion Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254505627150f9423051df330e0b22cddbd27e75c529c592c07c05fece9af725. 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/DEA891500252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9f6c1d3bddaac205226190e5496e2c05a09df6f9d66a8c64ecb2c4330ebf1d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEA891500254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a120d18256564772526ea4ba286fa1ffae814fb1777c60f0b8c4478c0905da2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEA891500255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ac4a8951f06ea7138f7f68e9678a5e9050915473cec0219ef9bb82da639e07. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEA891500258.
Jazz at Berlin Philharmonic V: Lost Hero - Tears for Esbjörn
Jazz at Berlin Philharmonic IX: Pannonica
Jazz at Berlin Philharmonic X: East - West
Jazz at Berlin Philharmonic XIII: Celebrating Mingus 100
Jazz at Berlin Philharmonic XIII: Sketches of Miles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c8c8fc1d89bb33d4a1f4d74f4ccb2dfa47d1879505779d98ec52e96a4b1500. 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/DEA892300160.