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 0x099d76cc78b6d36cbd49e31850f7154783f5d398fff37f45b3a026e780d68e63. 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/c15f9486-5273-4dd5-8678-0c6f97a0131a.json and https://artists.proofprofile.net/proofs/artist/c15f9486-5273-4dd5-8678-0c6f97a0131a.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 0xf6eacd16b1763207607c30911635cfaab5a0413de31c94db85bbca55606126b9. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/TCACW1784183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf66b4dbe499e7b744639aae87fab1e8c72038749a4a165372e372af9160896. 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/TCACW1784185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9eb8330cf4c57f82c936df209547b9ddf2ee0acbba6c61c2e735a8cc9a0fa8. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/TCACW1784189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e9ed135b645afc92f9acdfad1288599587a09abcb8455bd6ecec9b6ed78ed1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACW1784197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d5850d80dd3807af345ee292ef9b9372be022753a3b7d4708a0027444c8678. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCACW1765174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b603a7833caa6e8d11f731ef7d6b8a8ade0524543af722078514c0c433bf79. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCACW1765189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a5b3aa2a3f05fdaae895b7307bac7cba7a9b638c9129fb5979d94030f9901b0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCACW1765198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82e04d43965bf9a0c32a187e587ea59687a6ffc4d58516f55c210f471fae22c. 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/TCACX1753110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249a8204b2d1178e9f6652b60eef45f4d002f1314370965a66369f3208aaab45. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCACX1753113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46de269e615a4b1b618d699c1b2d4326b742813ed80eb123283b3d8ed9e5715b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCADI1789501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9d33a7786d2f2d0f36a8a8129eb499862a614988d60b3c5aedd567e450514c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCADO1822541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d4199dd22f2763fc9d82e5cc987629c76cc9eae36c2cc0ea94f6f266e96087. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/TCADO1822545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c298020b2a29a23d26d8ad8edefea237eee303731faa531261353d26558604b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZDA71982754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfc91b810fcbea06d3fd316bc74aec41ee5a4896eb530e2e517b9cd7c447804. 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/QZMER2062590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bb931a226866bd479d2dc88d46b4625cf060c070e589c2a18d3a41c811bd82. 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/USBEB2310104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05dfa1d78141abf4e2a8309dec416a2ea03e299db36dde4d2b2cd57de8228cad. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USBEB2310114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e41598917f940b5fa51ca66769b07b1525a5a07878dd58aec4b99567949a877. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USBEB2310116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8ee88d594de4aa2b3c06b38c0845ee695dd0500fbe9e8e5c97c4e62afe39c3. 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/USBEB2310117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4057df957a8a376b310c3250de58761f8c26bdf34bd4b4f0a0a954015a23cb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USBEB2310120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25a18deb1b72513e36077e4f7813bba209f35a1d564eb0fc0ea5a374db5110d. 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/USBEB2310121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc633a307861cea5051dfd15d9d6d2d93d39fab4a81ea6b92db9d3c9777f5aa7. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/USBEB2510080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098fe742f976449c6c049c89e5f00d4cb1402d7e866797343c5721929ca83eeb. 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/USLZJ1672852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c352c5cab692779c91c1481e4632ea67904fce1edfd1f2cf3bc5db82c83707b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKACT1611939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa012fc0e0c7e74e6f6da393f705fc234e84f4e680ad3e60a3c2ddaa09d5d7b3e. 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/USA2P1667153.