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 0x53a6832bb6d8bc03cbc45d0b27a09c27e7eac04ebdf123b1e86f47192c320ee5. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c38f0c9e-7baa-4031-b931-bd3471a26b1e.json and https://artists.proofprofile.net/proofs/artist/c38f0c9e-7baa-4031-b931-bd3471a26b1e.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 0x9997ed29bb985598d039301f5b492b457376c3b2db45ec1664553e7fd3688e9b. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZS652357170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd76d6f2dc116a2d4280c8a38800618727003e5cf3cc3ee9843d8c9a40db546fc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:54:02Z), 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/QZMHL2351834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6a5a9443cd4f91d066eaef3ad9477d1ddffb82c84027f6160dd8686d195b3c. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZS632312327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7782ec8b9611a4fc6ed0a50944a5b68d3ad96ea5cb1981ab7e041f50aeada47f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZMHK2385777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9446d118b483aa907800c6fcfdac89982ab2708d78fb00318a051ad59de8ec. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM42K2360845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb105b1ab67cd6fdb7bb27523bc6e6353c9e9dde204373c93b60ed66d975326a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:12:21Z), 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/QZS642274245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf648d904390e6ac0cdc9e35a4a2c37682b193de2a3796f6a40f397e94277f667. 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/QZJRB2526145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f6692d2146b092b632792c7a59243772f06deb52c5a45f5dc0eca2460841e9. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:28Z), 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/QZS662504928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18462f5a849aab9efc2621370b29fda3138e90915aadf772f998c6e2ea3a433a. 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/QZHPJ2501010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23ff413a7e726e526ac8e463596e3a9a70e92e9181e58337be7d7105497bac1. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZS652530098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd1708ab19d36f642b2d5445a9e6ae6338090689a7e105c7f727063324855f4. 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/QZS662503541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62269bc564e2133040cc15368a1c7ae3e278a1fce9ca7ff84d11d10b2ac0a29. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZS652571550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce0a4ac9e48996f5aa86507e9f71c8bd29f4211bbe3e780727e3963f3d8f8aa. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZHPJ2532567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a51effb406349f562fccdc1911d38e723b437f082910c7b1b8f76641809baf. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZKDK2536764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f1462c2d39a733541d61b1f1263e276d6741a3946bf5868dcb4ff05ff2e0cd. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZS672516906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2778bab84ece223e586247b51208122f11ee6cb9f2582075b113552a1a70a3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHPJ2563161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61fc189c77e06ac7da404b166f8e77c085ef3c11778c41ecbd2253037b2172b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3F92548126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30105f8565c4c35ad20c36e0767da449850c7af7f08979d7d00cf47827b3d7cb. 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/QT3F92548127.