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 0x35e37b74e96f8001753978ad39f2be6df316ea87c214354840dce9eb1677d4a7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a30ba918-f067-4def-876d-e57441a48a93.json and https://artists.proofprofile.net/proofs/artist/a30ba918-f067-4def-876d-e57441a48a93.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 0x5d34c90fe86d2ba01342039caa2c4b4783a407a6c96f040367c2686971ad4f97. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:54:51Z), 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/QMEU31725287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96b469c47d607ecfe2962bfa2aaf4953af82ec78f768a11e21c0f9420df20960. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZ5FN1969274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c588a60489d4bf9900f449108b243b5fcca46675958e1b74f97082d274657e. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZ5FN1969276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d19efcc79443631e38454a1a3207bf23cc9c023c40951b1f8793aead4366aab. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZ5FN1969278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62394c4a2e71b0f76c787780e729d8c45e1bca8d40e2c4189f03c2f65b11afe2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:21:15Z), 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/QZ5FN1969279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30e650730e996bf646297670149b42e6119b5681746d8c63b83675c354582be. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZ5FN1969280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55886bcb4e1be0ce4e026d1275c018095ec86982e7df66e4c62aaae5c314b474. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZ5FN1969282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580785e9b9966efff1367e00ef0c517d1567593c59e216709b777c4e083c23e4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBWUL2108759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20d7b5014bbc17b42f4174be1dc33859a821d01a1d6bc471a7f2d54032a4cc4. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/GBWUL2108757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabaf78e812341f30ea46e5802d3dc439cdff5fad5af81c807a5c28f7e429db7. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:25:48Z), 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/GBWUL2166681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35e455d83a34d871c77b16a1a0c576c07c68379c288dc136b2fb5f07a90c84f. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZTV32205472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2622a87086a869b546d6e8bcec33f31b9ae000a972db5c977a88077f0fef57f7. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZTV32205475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1382daa50012a26ea180a3ce77ecae35c90514d44717dcd52149a5cd15bacf11. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:26:48Z), 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/QZTV32205480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb112b6e716e4af58037410f926881bca6b69de38526926797a407ce33a6735d8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBWUL2108758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bba7bd2d595687146785f161cbdb62af4d83125e0a12440d8bda620818b61f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTV32205486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7940d851ce8c0e1294dfda0ac6743cd3f19cddda36d5d23e54693babb4b313. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBWUL1921410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d59aa909b70a60bbfceefe4a483cfc191c637b2ed51f00b629a27f1f93a12f. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZTV32205493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78de77e112d178a84fe58bfe1664bab550a0acbb7906002f54389248d0de2718. 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/USLZJ1886830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf778e84ceb5047475d151c86c569689b7f0de2b3d0112a78436bc397c249973b. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/GBWUL2301220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c59ae35569fb5bbe12f1c5fa09c6ac87ac578373bf3cb634a2590b5bbf3a34. 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/QZZEB2360507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f2a8b0ead4f3da4d35869bb1712affa9e2d6076f802122e3341ab07eddc07a. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/QZ5FN2405342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774723061246d30c77eb247d1d97eba8ff63337671b3d72d9c3e2cd132038205. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:18:03Z), 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/GBWUL2431479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05178b2337753343dc4ced6383c9cdd7545e09f458cec91c1de58dc1385b3ebc. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZZ8A2408651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1e557c26d45a1810b59e99954206245b27ce6eb19df7cdce37d0ade1521d9d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZZ8A2408652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30fca6af2c4ee6a92c8a27e0b6d34d438cf8957f8b729c4c98e9c664dbd00d3. 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/DGA092432237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76502880a5eb8019d6e9bcd390b1a4cc70e26ccf3a3fdf80e7405b648c59ad5f. 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/QZZ8A2420967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a48805f3b91bebf1aba5b7da50a358a7256e983e45e21f1a7109e087277b39. 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/QZZ8A2420971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30fca6af2c4ee6a92c8a27e0b6d34d438cf8957f8b729c4c98e9c664dbd00d3. 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/DGA092432237.