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 0x3324af386ef8c96604f2a3dc1203f7587dc09f2139422471df2b6cec335b2b9e. 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/ee7883f5-0031-496c-a91e-ba915ce71bc7.json and https://artists.proofprofile.net/proofs/artist/ee7883f5-0031-496c-a91e-ba915ce71bc7.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 0x6330aaa589d3c0912efbbed8077f1f469af7cf3d0eee492ead9af9a462b0c22b. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/DEOV42301329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8427aa80be46001e6de4a8f1708f4b71ac9a7ff8334c37dc003bf39ad4c124a3. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEOV42301324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7832dda16b1dc15a241e57f2b53cc3255d87150027034b7299410f359699369d. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEOV42301330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbade077ce44e8d26a2b1d4a66d1e35d4ae48dc11f526c048a6657ae19b8f5144. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEOV42301331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd267dc550a93b96e0b798a5b19c97945d82827eedeae524af74cd5523d8bd423. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DEOV41500206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305c8eef799e2797ab666d1ef1edba49dd748e9b6fddfe9a400e6325f9643304. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEOV42301320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc69f683259b5812d8ba9892e54deba99d3dc88884685e87c8a46116099eca1. 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/DEOV41500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1bec1a39c16ba064bb7f6cda1ff37bddd6af90cafa6f56df6a350684f6bd2b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/DEOV41500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6a6ec17ab1ac574b1e3dca25bd1b854e0b4d321455e29a24a94c156506ca4c. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEOV41900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe1beaa32ab4286c340c51e243e8bd0ab0a9cf87715c857b602d5f62aec762a. 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/DEOV42301325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f4b1387d3f1399ada960f3871c921447aaa662ce634af00da3afb6db5cda26. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/DEOV41900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7232445ebc3c1ead8fb79a70bd00bc0ca1dd324045d0f64016774d7e2c241ae. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DEOV42301322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3225c0f4c812f3227fdd6e9e1c7b23986e0454b4f339b68fd66c0483fce92e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEOV42301321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda015503082256e71bd1b9676641f342e5862c7aeefbfb1bb05f7b8a3f1aeabd. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEOV42301327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa76e38061af8a188feac4fd0faafd51cdf99c802c23237fb46d6816a2526b6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEOV42301328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc222665bdc83e89d5480e68de97105d5baf75b4547ee8abfb42f06e09f8137ee. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/DEOV41500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6eda3f3721df0b29e4b95bffe0958f809a672fb8ff8232fdba78a4778aebb94. 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/DEOV41900102.