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 0x86190b0d64dbeae4f596902f6548af43832ffa8e3df0d83f20f4c9ed85ab0593. 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/cace35c8-78ef-47f2-898d-d0adfc00eb2c.json and https://artists.proofprofile.net/proofs/artist/cace35c8-78ef-47f2-898d-d0adfc00eb2c.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 0xe94bc80040229bad23f2999bf32d18b2e4042f62b985d6f12fcbaa4f158f5dbc. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:37:34Z), 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/AEA0Q2008872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fba82089f298e425efc677aca6b639c15b8f27627e15f203284da42f0bcce38. 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/FRX762045290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0c786c680705eaf28d7bb3a1d34ff9d1cdb63977398da69323cbd5823c91c0. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/FRX872075651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68d5f8c4a4e13ff6dbea9e49f47c30248661c766b6d407fada3ccdb0c8be37a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZMZ92111199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd94efae884d205735adc4cdedf9e6db1410e44f5ce3003c07eb15087a07fdd. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:01:04Z), 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/QZFZ32122504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3bb8ace90e5bc49ca3fdf6cf43e661e01268efcdf7c85f87a6134544f3445b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHN32142850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817eee59b3047e14603d65ff53d04ee8f95b8a2871d692c3a42c682aca0fadb1. 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/QZK6M1926914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d436e1b166cab67841f2de645ccca045cb37c85a7e9dd3c39ae91afa22ae097. 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/QZHN32144796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d7c5dc0fe3b0890b1012e3c2d76defb2f7c60613ee1e2f093502b23ac7cb6c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SMRUS0072746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d3e13f0db393767159fc16fb4944c5aebd0ee4f7ca7a97580b9bb317e95ba4. 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/SMRUS0074474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bbabe9698b07d80c00607e40a0a5897fd20b159e8281fcb4ad710014fd969d. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:40:44Z), 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/SMRUS0074741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9dcfa467d939e5c83eaa9a59db282c5e89eca1c0d2db464ae74b11b4ef1a5f. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/SMRUS0076997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff87149e4c40f71138650539344721941e984161d47ffc4a31ee953120d1ea57. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:33:59Z), 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/SMRUS0077260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d69830df3574661dddd0679ba6cb6f9ab1cb0dd68826f3932731f7ff0f1d1e. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/RUAH62425033.