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 0x86e42c35ee55a49896d39de6bf9f5a08b0a03130d6e91f427c46880b83400f7c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e7e12ba-9662-433c-aa87-387e7897191b.json and https://artists.proofprofile.net/proofs/artist/5e7e12ba-9662-433c-aa87-387e7897191b.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 0xcf36e6e8efc21c18d447a5e13595db77545b33c87841272836bf5ed6ec817eeb. 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/DGA0Q2385696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cfb91dc46ebd532e40e4cd27e4189dcda8b53c35038a89a779029edbc34062. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB2LD2310015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ace6fe977ec6f5c1c029700a85c2e94a7eaea5eed4bfe8579295f93ab00af8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ52038160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86d01f2039402b7974dd3dc2b8e7a44e5f01ec6d961d21af96b3a6e54737074. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKXZE2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78252cbae5a80435f08a0140adcc4a6087971d451b6bd2e73a896d5b79f9bb06. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKXZE2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78252cbae5a80435f08a0140adcc4a6087971d451b6bd2e73a896d5b79f9bb06. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKXZE2400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6c805d541dfc30bf9ec7a24bb4fbf9c5c4f4ed6c78eec668402306f0a8d54. 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/UKXZE2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa903dc976f5b5d4747d9ab730cfe5e8c97af820d033f9a7f11acf4c21b762459. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM6N22429246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b6c805d541dfc30bf9ec7a24bb4fbf9c5c4f4ed6c78eec668402306f0a8d54. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKXZE2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaac90785c13cdf7704c95de0af3b64365a7f0f86f321746a62b8bab47fd72f8. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GB6TC2412001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f72ac5b0657fc1bd7ac9581dab8bb7356d20b674fcc8e15fe6bd2e021e8283. 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/GBCJY2300507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adeb363478c2d1c551bf101ebd2f5a7d4635b553b2f50e9fccc7523ee5631d0. 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/UKXZE2300047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5889d51e447f2433bb26dde8dc3dfaa00e4b1dd057e72c84fdfb202e371cf969. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/UKXZE2300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8a076b61316f5c41e361900b9bc5438453e195a541b5c9e2ef5bf669a63971. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB2LD2210221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16301be8489a48ea2caa074f6fa580e21d977a53b2b7eb5afb374686a615e7b0. 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/USYBL2000524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaac90785c13cdf7704c95de0af3b64365a7f0f86f321746a62b8bab47fd72f8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB6TC2412001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b4cee83ad4cf3ca1f6dbc290d2c83697399ca4a8cd63f1157f998b5fed5c1d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GB8KE2326608.