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 0x07cf50766dc8ed4db39a99e2d7c4cf7f58dad7cf1e245d2a3dc7df0d0bb2d12f. 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/ff3eb1f6-b454-4e6e-a4cc-ed6025d6fbd5.json and https://artists.proofprofile.net/proofs/artist/ff3eb1f6-b454-4e6e-a4cc-ed6025d6fbd5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lingua Ferita XX (20 years anniversary edition)
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 0x694a969915cc128d0ca2e7dd342e8be71971837d50279d4678df37d467128bd4. 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/TCAJM2509303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77a58af70fbb377620dfcebbfc1f4b0a56a17ea12ed80756e37d3a8b1429db1. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/TCAJM2509321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c25f94c1ee500073f0df29ad0178569a53418ecbcf79122bf227bb40bb887a6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAJM2509344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39de4ea3b40483e42431751bce723dc7068bde015c41ae3f84be6144a9367b3. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TCAJM2509353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cf54805e08fc6d51d547a97cd310fe8a3569fc6f4773ad01c816cbf5d4f476. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAJM2509395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639c43594520df0146cf12104b88a8290b57d46f1f4b4165cbbd8cb535342377. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/TCAJM2509423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a76d26db075d7d4a62eb5ba50bf2f55faeea44052e17a181f2ce69453b6db2f. 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/TCAJM2509434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde545e27c7ad9c852b7f096290309e0fa46e9faf0c1fbbb26b32c4745239a095. 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/TCAJM2509442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34076428d8cfd6d36b42122468972888ed108a3f3a034db2b982a8e44dde073f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAJM2509465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219630799e4c3440ec5a0fcb96f97394d7b7315909934f3e2e0181b472097ae0. 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/TCAJM2509476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe380243e815f337d4ba978b0cc9176167b394359a34e3410e79b838a549703d6. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/TCAJN2509482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d6099775c9642275ac393bfc60a4c02f7c4764cbfd8b628dac849266b9b694. 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/ITRSE1600627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3eb49262ba88bda2e80d182acaf2edb1113e702876230413c5cfec9bda62911. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ITTVA1700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c740420e79d664340f8e741863e0bc8eff6f8fca1c63835ddf7d59d80490c1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITB551413123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534f34bc399236bc361709d5e14fdaa86230ef73c87853160a9ec09bef8e7512. 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/ITB551413128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d88c42d28741108066ebc41bc2e86dda2f29a8cd237b3798ee6a3ab4c125dc4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ITC940600489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715eeb07222df1edb1e310c2a3455eadbbbcb5c7ad67abdcd03400608c6fd839. 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/IT0501600381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c86694f6eb923fff1fc7f46cb8a317e778a811add7b2aa778c76deefe11b29. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/ITJA21600331.