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 0xc6876ce93a5bfab39a53e90b41f49170162cf4a0056315ffcbc674ad60f68254. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9554dde-8b24-4004-80d0-045fab36ca0f.json and https://artists.proofprofile.net/proofs/artist/d9554dde-8b24-4004-80d0-045fab36ca0f.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 0x33ad375fb2fcfc2dac7a30bf76cd9ba248f7084610267f01ecfd282a744642ea. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/US25L0800368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88df51e1b5d669eb1852f9c7baf49ec0a2550f470b7a219e0f831562346ff6a2. 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/US25L0800369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00da89b252afd10084ec301184d0ef9214009c9bf38c9c4f2c47780996ef441. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/US25L0800370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413f365423a09184ae02cf81f570d78efa4136b5f9ac00cfd0276c22158d49af. 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/US25L0800371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96da443b12e57b577c96927398dd7f428b7c42cd0cd1310bc8332b8acb03c04d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/US25L0800372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77942d4b60e01313fad6530a2b8fe23dd945318cea0eae8eb7d185d6cf25dd3e. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/US25L0800373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b72f7966aec2a00260327af5e8f79c9005fdd008e75c584dd4eaa6f768b9f11. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/US25L0800374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c66d6de05e7cddd63bb82a7469afd8256cba04d6c14c03a26993e894353c55. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/US25L0800375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2acb45b4430456d1e7ceb999923349a8de1c75cc3f74380464614f94bcbf49. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/US25L0800378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ad375fb2fcfc2dac7a30bf76cd9ba248f7084610267f01ecfd282a744642ea. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US25L0800368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88df51e1b5d669eb1852f9c7baf49ec0a2550f470b7a219e0f831562346ff6a2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/US25L0800369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00da89b252afd10084ec301184d0ef9214009c9bf38c9c4f2c47780996ef441. 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/US25L0800370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77942d4b60e01313fad6530a2b8fe23dd945318cea0eae8eb7d185d6cf25dd3e. 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/US25L0800373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b72f7966aec2a00260327af5e8f79c9005fdd008e75c584dd4eaa6f768b9f11. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/US25L0800374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c66d6de05e7cddd63bb82a7469afd8256cba04d6c14c03a26993e894353c55. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US25L0800375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2acb45b4430456d1e7ceb999923349a8de1c75cc3f74380464614f94bcbf49. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US25L0800378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a405e69bf368e14f843ae7857954c7ac2314b8d9d2e15ad56c3a6f7632cef17. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/US25L0800380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae732d6330d0c5fde5f91026ede8e0dcda7c6feae8cfdd6ee1f0fd924736e3e. 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/US25L0902704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x269428ff2922b004baa96fc484cc5f53174a4c351635394416cd48dacdce1375. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US25L0902222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88df51e1b5d669eb1852f9c7baf49ec0a2550f470b7a219e0f831562346ff6a2. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US25L0800369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00da89b252afd10084ec301184d0ef9214009c9bf38c9c4f2c47780996ef441. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US25L0800370.