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 0xe798f2e1f63c7beb1562f0cdc1693a47b47af9397921df1324fcd141830f401e. 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/11b906c9-2fa9-43ca-8d11-27a199a9c252.json and https://artists.proofprofile.net/proofs/artist/11b906c9-2fa9-43ca-8d11-27a199a9c252.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 0xd00ed6b66c7539d13c9bc87a8347bd91331fffb23eac80ed25558ee1c9e5100f. 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/FRYAS0755760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e26adfdea57db151f6b425904f8dab7faa498db0941bcf2d5e56537d8fb1fd. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:06:09Z), 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/FR72X1111002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b0e6b1f5b50607758be3065c3958cc28691f3bfcea4c3e841191b5b9d0836ec. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHN2374526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33559eea765c4e950947758bd382895b86e47d82a972a2d3a4f444ad08af2435. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TCAHN2374557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c73ec656dc16ff9bee0b0f854c02be85e11b677871234268abe3b804bc4d1b3. 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/FR82S2000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c73ec656dc16ff9bee0b0f854c02be85e11b677871234268abe3b804bc4d1b3. 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/FR82S2000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dd73a782ff42497061c8670b524894964349f06c6f8cdf72ebbd926030324a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR82S2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b631314bf737309baa1c17fd870e7a6acc51b68a86f7fa482bbfa15904db0a1. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR82S2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537a6156bce0240d1af50d7d6fba79d2e6d3f5329e304b5a081b81c1a5bd9848. 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/FR82S2300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e23594fb24ba8e6149abcaee6ef790016cc229998ace1766ab963bdba6c2a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR82S2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3438ed5623ad49e050acd1cdf50b6d6cf4086a180b2b2994050a4c0c68b0600. 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/FR82S2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e23594fb24ba8e6149abcaee6ef790016cc229998ace1766ab963bdba6c2a. 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/FR82S2300060.