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 0x53e3ddea8a59b7f9b5c63587788fd67cf16e85101be301d146b87e9daa6f0d38. 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/6d720940-c636-44fb-993a-e14f9a8cce23.json and https://artists.proofprofile.net/proofs/artist/6d720940-c636-44fb-993a-e14f9a8cce23.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 0xa1ad99ebb146348995036dcd12ce71b37cc2bcc3b4d6cd789b4b5909dadf7b27. 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/USHM21584267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf24bee531313c0616a5f769521b655374ecdddcf4640fe176848cffc7443e2. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:33:56Z), 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/QM7281676389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265f1a59f0b2c268307eaa3560cc4f67e5e81efd4cbecc7aa617eb0c33812978. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:07:27Z), 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/QMEZE1804794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9fc39bcca0ef3030bfadeda7bef577a1914941eb42c77a807b31f175c6c2f4. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QMEZE1804797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29547c66f397739d607bb3b7b5babed8226e60a01b4e4c449dc35485bf62da22. 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/QMEZE1804863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7837f8a5a0d9799c18a2b11e4f98d09c6318970d811b40bd429b90735dcf9dca. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMEZE1804870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a52e5e821c6d57be22b39d3f337ce0f6a74bf4551e5cc464d9e9ec37483558. 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/USDXS2201356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a10a3eccb67e7c21ddbcd5c36b596f4a6703ab62a8e3ab7df0f7bf48deed47d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USDXS2201357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90886dd6332b47280a94410afc53e7ae5aed7a276e48f387f8ad4c097d0e25a. 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/USDXS2201358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4637812d4bf6619cef63cb34991adcd64a47e22b0c964e84c315845a3d67354. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDXS2201361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa584a7ec80d4f358013242eeb84e1362c55fd292a2432e0486d309a4d70b2a19. 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/USDXS2201362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b281fc693950a65aff6e0f1d03a6e5440590c15beb0ce2f0b76832edef65b1a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDXS2201363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e779d8c9dc71495c071a1d94f2d0d1c06aa4867cfc27bd0183fa957c303f849. 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/USDXS2201366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9f32bde55c483ea250de2519ae5f683336beb4c1109c8b6181cbfd46829b61. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USDXS2201369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b200bb4e5c209e530207b2b4ec0a60dedaa03f3a6e0588ccf5b95d53872d267. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USDXS2201355.
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 0xc5b21d7f50af610103c2005dffdca429fae71b453a95fef065dc8cd295cb229e. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USDXS2201359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6812273fe8d392946253f98cf78845bf3beb1bfb28fd57d447cb4d00ebe3d712. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USDXS2201372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83fbb48cfbc3f4d665c953482a042d8d9bceea7b1747d703a89298accd3042e. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/USDXS2201364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866b8b6b87cac54bb248257ab3d69f03bbb77bd5e6a9ebd166812649c5c76a3c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USDXS2201365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbec36dad6e23c9ba13db4b12fd1b42f3a725efc935e8e97444b3a2b6a32cc4. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USDXS2201367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6beaf01a9eb5a27af1ae54ae1628d9dc7b8c534f3d4669dc80c8cc270a9b58a2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USDXS2201371.