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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a8c496e83af4250507ca1b98a50fe32e9a07743ec104ab6dd71e1923f8b644. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a645ca70-6368-4bb1-9d9e-5dba780528ee.json and https://artists.proofprofile.net/proofs/artist/a645ca70-6368-4bb1-9d9e-5dba780528ee.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08db808d6bd29e55827d1fcc59b0a0a14990868e34dddc801ca947aa36547915. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DE1A32127885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb13034c56a862672c2bafd9cd19700be856d4e5d727df12b83da4f6f333b9079. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DE1A32127877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719e8cfb7bbb2f9821e4dc0e448ddd55c9bcd6d72425cf8655cd4649abf9c7a3. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DE1A32127887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa732cf0ed825290884b10efa3bafa004e4c675f752ec8365a3cd8470569841. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DE1A32127889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5544bedd7b3d2c0cde3abf4b5de2535db74e6fa887a8b2fcde9b6d88f33b1a5a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DE1A32127879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa0dd77b497be5cf8e7450cb52519b82651f0109e9ff202eba423d5675dd50a. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/DE1A32127880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab30d7e7bfdd7e3669c7f6f226f848aaf623061b22254a23ad91565d8911724. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DE1A32127882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e05e268952dbfacfa26c9700fc89d392fdd426bec9d61b1b73b71e7ec156ac. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBHCD1602449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3c7dc9b1141ba1050a793014617003569ce7d95076ee15e599c1b0130c8dcf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBHCD1602450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0509ec7c38bd677a833980da4c97a3145ddc70b52670d68706dc3a23d14471. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBHCD1602451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716495bebe251e758f247e5ecf0940529541ee84e77d1538d6eb39cc0593aca5. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:35:22Z), 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/GBHCD1602452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5796b0b91b807d46bef38e7d322633de610744be22fc61107225e88b08f9d16f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GBHCD1602453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0a99ab15ef30aaad313e1dbdc1868520bad5a7972cb30390c85719c0b654f9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBHCD1602454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf658f8d3c03ee60ee86058fdd9e2c4091bcfc7e89c91c7dead06c2edcad9e1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBHCD1602455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74103b3e968ff3ebbd2f27129c7cc1d783c2887b413c11ff7a3771ffba4018a4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:31:12Z), 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/GBHCD1602456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c7bdb204be6b2f841c3e416f87070751db7c1d19ac580d108d960925393cc1. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/GBHCD1602458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dacac27c8d3f7b8418c45d5d4049f89d829fb18be78c9f8eb7d5313392e503f. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:23:23Z), 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/FXR752502069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938d3d772515ef92f41ef06579e97bcef7d3113c5c194b21a72df9218ef38742. 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/US3DF2408557.