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 0xe3002c37474489fb917541c6c91968cbe9856596a240c572e91021d72942b3a0. 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/bc6530bc-b9ef-4cb5-a81c-ba21274dff82.json and https://artists.proofprofile.net/proofs/artist/bc6530bc-b9ef-4cb5-a81c-ba21274dff82.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 0x440823339a246483656c736af23fcc7981194912ed9e75c4cfa9cba28d36a849. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P1932109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739e91b33346311468ef624760e1fc7114adb4c74a40ff1eb0ba03e9b1d7d47b. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/USA2P2029680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a65b7ad229b6ed1b0b9d744010f7c75f0a5dfdcc8c169e970f52ccf6a77ea3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USA2P2034072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec540fad948970c03a3b384728f758cf5bf368f972a8f745b7cc754dd5d1cd9. 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/CYA112000782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b0e5e88c1c8cfa37290a182b24d24210f58eeba3772184614a2630ddd0716f. 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/USLD91732880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1444e175460415afb701a801f89a10bd7aa7be0aab2979abe2c9d3226089793f. 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/USLD91732895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00f902f69631fa3be35b8ef9dbf4cdca09b788a3db4e4df880d347c57fc5ee4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/USA2P2130634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7633495f10f359557cc57961e0de905e896cbf8616b9e09489d95577b2116b91. 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/USA2P2130635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b37c788eacb9f6b519a1d966779bcdf96f0ca24484605b80a9081d10ff0685. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/USA2P2132288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7ac92d08bb98031d2051acf73ea7d15a45d21ca9190cff0e1da49b76b81db3. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USA2P2136373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a694f25daa02caaa7800b1b8e82ad8399cf6e078da6418c7d27d4625e949fe. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBTDG1302415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaed1c2d1e9df08771b71c25f3adf14e76bcb5d6e2cf49bf460863a2ebcd11a3. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/USA2P2211403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35931176fbe459237e1c667b0b5dc849995dfcd0aa6dacdf50b5645ba90f66f1. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USLD91737844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39759ab86a1ed65fae2aaf1f8e91d9753dd54df879aae57a92cd84da7329287d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2402073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f145a2925427f89bed5b3ec77206270bf3ea48f4a107f65220235dd473e8be1. 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/CA6D22100804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd14cf10f174fee86840b044a18eff12c456ae8f1ac48043a7c13e322ca72ff46. 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/CA5KR2442395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9898cf0a192c06c4463b03a8b4d74110dac09e5f9668f9cf985d8720df2ddf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2122889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5f63c8ea4f97fbee7e368cb781606ef93961cac155fdb732e87e9ec9b48de2. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USA2P2122888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c461e70b4f7cefec0ad9dbc43cf72b3a3883eb1dc239894ad5a8147633be0cd. 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/GBTDG1302609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ab50e9375ebac2c20dde09ddd24a73a23bf9e343060199f85bec426e22ac99. 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/NLCK42218780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5f63c8ea4f97fbee7e368cb781606ef93961cac155fdb732e87e9ec9b48de2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USA2P2122888.