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 0x84934895fc9b07bafc2fb7fca0958b623bf8767af34176f7eee22b520e101b95. 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/73bbcad3-9459-4c52-9d1e-1197834be786.json and https://artists.proofprofile.net/proofs/artist/73bbcad3-9459-4c52-9d1e-1197834be786.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 0xcfd0a5f8807f65df0150ed2c5c3b87f474173d066f140df76bb5ad069c3ceeb3. 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/DEUM71905810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2330f77251ff0f1a85db5ea937436d611ffc94af2b50411c4fbaaa09c18b70ea. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEUV71901636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80107bd85ae11b74c9cdb0081723b8ab7665a85cf248717127a5e2871e00424a. 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/DEUM71905812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d92b57fe6784423a5886dc0ae0851cb0030e40595b14e3ca9673bf1e5b1bd0d. 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/DEUM71905818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb05f76016c52c9501c5c3ab6a923c2bf0515be8d2d163c58169509cc21011e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/DEUM71905819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2267bc3d4b7d7c8ca12fdc674d1e415f2777fc4f6a1c317add41cef98a816fda. 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/DEUM71905807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba08359be05221b895dc9a414c00f3a2baf188b569ca1e7a4fe2ee07e390489. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEUM71905808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2cb171f23425af63456f08b0fa8492c1a6b17c42213f3e6238aea054a9d0c0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEUM71905809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd0a5f8807f65df0150ed2c5c3b87f474173d066f140df76bb5ad069c3ceeb3. 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/DEUM71905810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608d12ea520fb6cd848887c706437210cb514ae34295714b6c7ef489d75f8c78. 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/DEUM71905811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80107bd85ae11b74c9cdb0081723b8ab7665a85cf248717127a5e2871e00424a. 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/DEUM71905812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf819946f41a43d4aa4ee3b262b8e03d38d60fc211a77e31f9ccd6af43e940a32. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEUM71905813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f0d1b91e561e47a467ae50a32f84a97572bb8610782e44bd924660a8913624. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DEUM71905814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ce63ea6357460cfa9a4312dc57adf5e9c3dad236bc89bd7276d2c6bee8f19f. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEUM71905815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a161026b4cd9438a2acbe47d15b87fcaf3517467ec810f3c8ecd939fc0b727b. 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/DEUM71905816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe027e7d57b4bf020df67c3f87b7fb9a41ab50a4ba3eb8f180939c80b612944d1. 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/DEUM71905817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb05f76016c52c9501c5c3ab6a923c2bf0515be8d2d163c58169509cc21011e. 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/DEUM71905819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d1876a522704c8887619bc6e0c5fbc766dc1ca377dd2a5cd9b155949eeb91d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEUM71905820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ee5b655135911499279f62863e30acc6aa3a620a843f78f9b519a9d964959a. 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/DEUM71905821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9ea3d09d8064a74d116f524942899e890d3fa4d93988ad2d29077b1db53810. 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/CH7812195203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2cb171f23425af63456f08b0fa8492c1a6b17c42213f3e6238aea054a9d0c0. 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/DEUM71905809.