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 0xcd6bdc2c5a2869dd80728d42f979dcbc43ff438982143b7bb024708bec106f67. 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/f900620b-fc92-409e-aed6-127e59b681cc.json and https://artists.proofprofile.net/proofs/artist/f900620b-fc92-409e-aed6-127e59b681cc.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 0xd3c155945513d39513ab55d7e41c312e919315b2e34b82c98e34c8e8a89e711a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCACN1662358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820696c92358593e9f8bcf712398bf46a3c056457bb70b716382a84807fb00a2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAGEF1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21e6f56a1183617eb213ea3efc3bc29c9a9bf10531ad2fb7d6f412bd1a75ae8. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:43:14Z), 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/CAGEF1800044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9ebd49fbc9f43b9f9d50263be5326a6e3b0e03d9a4f8d42756f60a9b0b81f5. 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/QZD5H1800063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf730c98021c83d086dac59bfbf9b1ed725bf3dacae88f636745a478a01c0f0. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:44:17Z), 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/QZD5H1800147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ea9cdb136a7183a99dd77f9805a734fe2cccb3ab1760508994eae26dc6814a. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZD5H2000173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1981298477f87faebe4e668e780506db4039847317d119f089b540430afc5377. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:44:10Z), 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/QZD5H1800156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8146ea62cfc6eb327b6bfb05dedb5dd2b3ee55823af9db5584987468249b2b7d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZD5H2000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c686c3920370143c0da85256ca381dbcf20e7d49f44a4c6198c480f13f096a. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/QZD5H2000323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f40edcde90cfc73730c962acb94b3a1113da9960918f953bb1c6bac96d7a57. 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/QZD5H2000354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f40edcde90cfc73730c962acb94b3a1113da9960918f953bb1c6bac96d7a57. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZD5H2000354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1b0f64f90d60e7bd2009cf470f05239022860047a4f6faeec817b0d1396fbb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/TCAGN2266373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1b0f64f90d60e7bd2009cf470f05239022860047a4f6faeec817b0d1396fbb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAGN2266373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1b0f64f90d60e7bd2009cf470f05239022860047a4f6faeec817b0d1396fbb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:26:19Z), 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/TCAGN2266373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba5fd7e176c55326408ce422a9bba44ea968da7fc7bb820b1fc320bc5215ce0. 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/USLD91753707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9e92c13be718d3f4a62fbb04c34c7092b10b431dd0bc1b633c606ccb6acfdf. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZPEW2448537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21511bd6c77684340d6280cbb107502ed65c7c471d5aa474ada6424c23e80a59. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:24Z), 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/USLD91764513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21511bd6c77684340d6280cbb107502ed65c7c471d5aa474ada6424c23e80a59. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USLD91764513.