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 0x1e219bfca306c0e8cfe0d2d954d0b0fa29bb05ad6753166613f736f1624532f7. 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/78f87f5c-905e-4883-be5f-7fa447f56ba5.json and https://artists.proofprofile.net/proofs/artist/78f87f5c-905e-4883-be5f-7fa447f56ba5.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 0x1d02a9c4657139548eb05a8cfeb27e12eb4869840bb03c29d66d7b4294f11d14. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCACT1605076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21f37054e6a8c1aff10e7fdd6e4d6836ceb84035ab0e702698d043e4b3e1454. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCACT1605080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f12d534c9b606d03d657b798838e885dbc5517e23d467dffc71a1ccbe9e4fc. 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/TCACT1605082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d0e9c963d13f96730dbce213215f2b58db9c9dc0033d68d20b46dfc9e19b07. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCACT1605092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6bfea1231ad9c72a32ee393b490e45cab9e4732f9b4ea785547e6e27f85ba5. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCADY1862667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0718f917519c71eaf0a1801e45016bbedf396a1671f7e1ef5f3ad14c0e9506b2. 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/TCADY1862672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfd2232199a00941f32d6a1171f22c0373d2f095d0ca20c87f02fa67c11bee0. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/TCADY1862675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc79a57cb23f1e76cc3358191735d54a7d99265c064f5f9ef1c28895b0e822dd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCADY1862676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e75b24b49c69beea308c1006e1f82912a9c9cdb20d2c4ec0da5bef191153c05. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCADY1862678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a45c34933b48465a49c5308a9e39fe4daae04f768455a1aa23f29c4a435d6f4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCADY1862680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc681463e7d00c0a064bdd1ada95467b7131836ccf9f7b1508b6fc9681c3bf5fb. 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/TCADY1862682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea2ef682e7c55e3e998021f0672e8b7e12e6158a1a2696e7a02db105681412b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCADY1862684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabceb84e2a3ef613fc90ed127d653c27402181e8a7b9e36b649f8454c0688cd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/AUGBT2464286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabceb84e2a3ef613fc90ed127d653c27402181e8a7b9e36b649f8454c0688cd. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/AUGBT2464286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3af916bd01f5dfc2ff47ae6a1a0db025d6188bfc8c7f84a1e9201bcaf3dc5db. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/AUMEV2521970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabceb84e2a3ef613fc90ed127d653c27402181e8a7b9e36b649f8454c0688cd. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/AUGBT2464286.