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 0x6a38e1006312bed581d2c7b9fbd8eed69b2a3a71055da7d84573eb54c124693f. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6858da12-dc19-4e00-a15e-48a3c43f819b.json and https://artists.proofprofile.net/proofs/artist/6858da12-dc19-4e00-a15e-48a3c43f819b.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 0x68b45fe6603148eed6d4e4224ca5b561f928ee08dc0b932488b9986d948ecc63. 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/QZES62065833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x704d32fef447426600ac82d46e585f7692c9d2f6fa56a2683a64fb5443b14866. 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/QZES62065834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed50614d929edeb657ab4963ac48b5b41f978b3e752fdd6398fb962d2a9a2b8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZES62065835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8489b9ccfdac83bf1cf953aa776b9e23c9659103115a63128213dc565cf948cc. 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/QZES62065837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c938baec203e736a76c34da4c3225782d2b29e03a3064d91b29fef5cdc82f4. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZES62065842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baad5f3f7b4e4cc7d1448f551dc21791c045bec31a056bedc4fc93bded57650. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR59R1608023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d76004aaeefec17709993d68faad5d010fa3ac67679b7b04df535b3afa4cefe. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FR59R1608024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8755f3fef7272a2cd38f60432afa3daedae4b972f8cd8b8d259f302ae89e49b7. 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/FR59R1608025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df408b6ab9b8c37f6e01c10e887166a0f98461e9ac313ac73559f2dc16e7c15. 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/FR59R1608026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbbed53816cee025f46a4dd5da44f541018d339eaaf763fc37e7a71683c29c13. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R1608027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d5532835d6e9a87e7f943ebe25a61631d8dfea4a27080c51d49ce1012c8096. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R1608029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f34bbf61f358d70b1359131c169b9278869a910f64f3d9aba8f79f2b86d4ea. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/FR59R1608030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f4e19f2ab26ca2346804ee2857f8d9e3df5aa054a7199f1b322ec8937bfebe. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R1608031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ba1e338653c6b74e8118c772b21f7d7604d8e00e3544e57ad6f523be96dd6e. 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/FR59R1608032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3c31f2ede5131f5fbe43f40e0e0e66b42d41e58e70d5ec83d10aee0b1e79743. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FR59R1608033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7cf3eb399a4ccc9617863845e819883e58783cede4b173847fae4c9c9f336e. 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/FR59R1608034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4884787f1e8608d8b3c2b60ba156b9f154f555c6420ec7032c52d85d0fad699. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR59R1608035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4e080ac0a614d75667cae4854bd00d8b55451aa521c4640247b0bddeb4da54. 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/FR59R1608036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6254ab4ea11f228ee56175666d83051c3699c07390db1897401f6d32141a08d5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R1608037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0223df713026c67cd76020fd798e02899a322692fb679c7fb9e3c18efc7456. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/FR59R1608038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b97ae3020e5e0f4ad52377020f593c44a500cdf3aa2a6585501305d5e69238c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FR59R1608039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ec840121de76a0c94c505294395149ed1626d17ac936acc73a7931cf421c45. 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/FR59R1608042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc20885b3e7dea6a64ec948db792c4ed6e380fdbb415885a45499ea97bfa9ef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR59R1608044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c35c537b4268048a4f83f0072dad25e0497d46f9d2fa859d0ea0245d7c90e64. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZRP52212785.