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 0xfbf7dd7f5a207b35e1045490bcec5be96f11cadd45e26b1638641da2fc41ba22. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/177f3374-1e97-44d2-9dfb-429769caa65d.json and https://artists.proofprofile.net/proofs/artist/177f3374-1e97-44d2-9dfb-429769caa65d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Two Mexican Dances: 1. Allegro (Sempre Legato)
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 0x5555ecf7550f583217fb6041c48fe36c2248390018dea28d8950788a83db9ae8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DENJ12000300.
Children’s Corner, L.113: 1. Doctor Gradus ad Parnassum (Arr. For Marimba)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272c1278d5d77a0dbd390acd26b4e1b104951e5f3c96b04b8daf8d7aeceb6e5c. 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/DENJ12000100.
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
Rotation 2 (Arr. For Marimba And Vibraphone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478e556c9004812ec2d956121a01dde038270e51eac3688bc1be1e293eb91544. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DENJ12000200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b804c59559e6d1426f5a6f9a080141964c9d3746ee32b750bc441db64d12ff. 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/DENJ11000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b4b80209afe0fee26447e9abecb124cd83c24d8f317d9dc103bbd439438169. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DENJ11000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bf4230d8cb0bdb21fb39c1853f857a30084eae724efa6193091c632f492787. 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/DENJ11000004.
Rotation 4 (Arr. For Marimba And Vibraphone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b288d2211434845adcb9f90988e713c5a3dfe01eb70407998c7bfc16e1f0a61. 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/DENJ11000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21b1b700c3d708bc0cfe28e0e4148c161e25ddd0c3322f60194304a4e8fbd3cb. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DENJ11000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4c9b4c2243b990e59b5582a37bf97f88aa04d8b4a94776d5191f16e836eef0. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/DENJ11000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5845329652990a580019d026da63ba12fc6f49bcdcc8831109e1289488cd2d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DENJ11000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05595342e7dbd290b6d4d6584323650875fe17ed5adf1e4983f3a4d1b169886. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DENJ11000011.