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 0x76e60f9a413bb2969ed2c0ce8c3300eea002857501f089d2ef42556e9bc5eec2. 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/3fb07f45-32eb-4475-b239-ecff298d61af.json and https://artists.proofprofile.net/proofs/artist/3fb07f45-32eb-4475-b239-ecff298d61af.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 0xf6e2a10c84a89f457cef97486efc4c93a69be3839258ee7c22f51dd0fba991f4. 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/USHM21357526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acf9c0b89b9df089ecb13ce6e5b02f6ea6fea61f8a289637044e78c9dcea6f3. 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/USHM21357527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedc8b43ef23c031af880dd237cd3d70f3a57b04c0582a8e767f37cc751f2957. 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/USHM21357528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d1ed91422642a015c6e9af2295a43d21515920cf6e76ddb27cd818eca645f0. 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/USHM21357529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164306f6b32948cda3857d88fb464300e3078e35d00ca9c88718f2e6fd3e0174. 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/USHM21357530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d29f476248778b6954eb3d1dc3ade624125aea8cb322a1c653d0fa543754c7. 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/USHM21357531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a67c7e9408d7bcf25535ed8df155882e21131022e6c19e11dc509befbfbda0. 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/USHM21357532.
Twirl Me - Invisible Light Project Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1fed468890802b76b455080ae15bbae52df2857218c2a5b1581fc70571c1ac. 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/USX9P1352453.
Save My Mind for Later - Blockhead Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450fb39893322d6d8ab6edf8d4e4d240adc8cebcf6ebc1eaeb61881f5ad37840. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/USX9P1352454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21105ac495e5719a4b4fde490c9efe650e2386d154e5eb7b83d0bb8b1bc01667. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USX9P1352455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff795f6673839610d3af5920891604cf78fd2cebcf415a862fdcc0d290e41a2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USX9P1352456.
Dawn to Flight - The Human Experience Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4062df6ae42c70c5a4b203cda5f0b3fef6ca0e8ac835261a6a74974bfefdb8ab. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USX9P1352457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8df1cfa428207c10718e86861816410c25474660d0bde48faa9f57cfa4d46e. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USX9P1352458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06797493efe05ba6df10ca6224d46b06186e97ed7d45822c282d327e69beb14e. 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/USX9P1352459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78eb0c56e125d4a3f066026a26743c4898cf6a3e588f1e02f030d6ebc233b990. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USX9P1352460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbff01f9559bff3a4215c1aedf7ba6c03ecc7fcbbe41304b55a3197c8e05012. 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/USX9P1352461.
Save My Mind for Later - Dr. Toast Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0519159b927a6c1c58237dba715e7a8c1202f739e15e25f3a93ebdb1ed03db5. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USX9P1352462.
Save My Mind for Later - Guy Edward Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bdf837afad8872051f6edaba999d9ac28a85b8966adb02608ddbf8158a98f9. 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/USX9P1352464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e500091c326c65ab9a4a1cd9045971be17a0e37362b961a51ab156c7f29973. 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/USX9P1352463.