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 0xb2154026903d51cf726bd9333e2d6b4027c45f1ad45a6ec9124542578d366465. 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/c8b346be-6c9c-4199-861a-83d2fb612037.json and https://artists.proofprofile.net/proofs/artist/c8b346be-6c9c-4199-861a-83d2fb612037.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 0xf74b56d5722a51b1d03a0ce7afbedccaea99edef1533c5433de8d3ad85dc0c42. 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/ISZ109601109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2f111e780390c92ff9dc08023343ee853898908782de99bf5c4f400c035564. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/ISZ109700603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa375d78f6ef5d10ba0e25b7321860c38a97b9fdb6cbf0cc6d77c025b8afd3bd1. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ISZ109700607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ceaa1afc49aef71aec49f6d67ae56d3b06f403407dfef9a24bf7ac12a962cf. 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/ISZ109801204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a0b42fcc822b09ea9a08113940a32011c725608f1db6a517026786ddb550b6. 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/ISZ109801205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7de3f9ca0b37123b59b6fe60a60e370eeb29ff94d7b28644c38a707e7dcab3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/ISZ109801206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dae4b4d30ca1b95c7cacc5fa42ef37d8763dbdacf21df5598a0939d5174a6de. 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/ISZ109901109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2280df29c3012b5d90deefb1ea35a4c2b500690002a25347c7c2239de7debf6a. 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/ISA110305804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d51b25035426aac1421d20207363bf00e4c6af37afce9a167b66fb49d30ce70. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ISA110305805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b1aad3fe27d3387393a4658efed6e10448e2eda97a40cab6442d545a896ece. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/ISA110305810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14842a1e1344ab10122d87ab6b81cf066c8338a61f4664723afeeba6cdddde7. 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/ISA110305813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9611a232a843d5dacb83cd59cbdc4f8715cabcfdfca321613dbd14c3965d34a4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/ISA110305814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb27bd509a47f981dfd888068acf82b1977ada14854a0ed13c59cc71e00f6e7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ISA110305818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab267804304319c9cab7d3b54a62de6d1eb5dc6c8ab22044ed1c06f8bdb84152. 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/ISA111102209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15997893b6a17e0675f3bbbe0711fbc23757ed8db7397a5a2077c2a18d1e9279. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ISA110305806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0899ebc57106d3db43c0f0d9e67d207ed9cf55a516b8d3b60f60725594850980. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/ISA110306203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f11eb22dd2e2ee14e01810a338f90a6ffbc9e86519680327763896ff5ddace. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/ISA220900162.