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 0xbb067de34a4fe632a9aa8ddf79c3ad2a1ac2ecf67fe784d0a779397ea08f41b3. 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/e46c2b43-729a-4c5d-8fbb-db6cc9cf8879.json and https://artists.proofprofile.net/proofs/artist/e46c2b43-729a-4c5d-8fbb-db6cc9cf8879.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 0x828d79055b1facaaa188f19dd6bfff4c56116cfe5cfab07efa9326456adddc9d. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZDA82071581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108b446cd0779336e4efc49827f758400fc442f8678c1daedd97213c067e2f9d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZDA82071587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652c3736f911b3d03c466f0766b17e6b1d42b71a5cff0150c3c4a7da8ed00c91. 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/QZK6L2085705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9085686cd2580421f823c1ccba78d6b4496ea4a11aa3eed57ecc66ec0b55db43. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZNWS2023031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33565c4593c2cd19eeedd03d6f6ca55d92f4a57ffefbebdc0bc386539b15a640. 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/QZNWS2288104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02c418550776f2de914cbbfb17a13e14739741feee26b2e64a991c7a633ebc7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNWS2288105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f7b1e0d2abeb53196031b90482a52e4b6f109d1b89801191ed368bd743758d. 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/QZNWS2244972.
11 al 10 - arreglosRetal & Taller La Bola Live Session 502
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd664538665414f471e9257dcfcac2da670cce845671afb0eeef20ceecf036c1d. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ECA0Q2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237d4364f41066a0f298b3aade2bc7261bd8cc0a82f587d6e50cfbcd3aa2dca3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ECA0Q2400070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558d3f31acc176a5300fb996eb66ba3a24792acd443edde4e04b7c1d600894a1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/ECA0Q2400069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7fe0f155d20e17856331959df31fe07aae7b61daa8b173c2b6b941f66c7221. 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/ECA0Q2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234811c5d3354d38373ca12010371f311bab5160ce8d79f01c8eb23780dbf34f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ECA0Q2500163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd571da34a36e9365861a53e6d7bf724401d768db2a6914761936396e3e000571. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZZ7L2500533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6feb08398fc9d8989a5207311c357cc1ac1528d0aac98c7502e7207e9bf46d5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ECQA02500175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc88928c25ea1bb08b2555159062064c626804a05ab30ec6aa29ef5e80e9542. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ECQA02500178.