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 0x3ebd2536a2406e94dd5c0630baba7501d52f9bb5e0d30452ea851c1912a110fb. 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/c0547eed-56a4-4dc5-b10e-81cd2b59aa22.json and https://artists.proofprofile.net/proofs/artist/c0547eed-56a4-4dc5-b10e-81cd2b59aa22.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 0x5890250c4143a9f04b2325c6bedd84eb6213e2a042542e9c915722ec022e31ec. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZES92020803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d76319e0c9dae7babd189a0c6ea77cd848ec947a1fef5e1535a29a2d299ba20. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZES92020804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5877c409377261f8e46e96346270d5cbc00970374f8b85b9e1407c7b43f3aae4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZES92020811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9323372b762c8d880872fad39cfb8e6d1d9cea4047af0aa41247a8bd2d1f8e57. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZES92020812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e71d7fcf1b7f200b2573a218090c3bdd194f4a3dc03fd39c6860f80d1a6fbbd. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZES92020816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d97b161c7211058742ea18b2e335fbe889e48541684c0b6b35a47f8cbf06521. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZES92020817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270604b8165a0db2e67666a0d1d748b1b37c6818bb7c33eeb9a543eadf953290. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:22:25Z), 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/QZMEM2037020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9904f5644fa2fa3b61e00f6e906162221179d7954850d606aa2710bb57bbdfaa. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:27:38Z), 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/QZMEM2037039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39284a02d4b490252ebbfdd73b6e9598f9a0fc6cf87f357ce4d905cab038eb97. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZMEM2037046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda6e145bd350ee3546aa0ca96975015a761b3b913a94d459baa101a005568cf. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZMEM2037048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1874c6917ce13664ba2240fb97d733aef9cd2ad12819a68a477277a23033e5. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNB2223756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1683c00fa1a539b9dc53771f135fa6b0ae90b2628b5fc80739f38e485e989269. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZK6P2254848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086583ba032eb1df9bdd5a0903542b421307bfe01cef81e33093a7447580d551. 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/QZK6P2291630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db00e81dd8c8b6adcaa6c46b47cd3f5e3572b3fe451350b0e53419bfa6e0595. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZK6K2205011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02408d6697e068fe8e1c8cc221f5b9739d6f3cba355e1bf94c4f5c049b610fc. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:09:49Z), 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/QZK6H2249378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8af7a45164843e5e08643a16acb9baf81f248cf79cc5be801e5743273979ac. 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/QZNWT2264131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x780e854c5ea7a1fea2a77800cdad2ca936edbf6330449a6c8a4ceb0caafbbc9d. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QT3EZ2402725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c446e6220cd20debd121396e6b23bf54e726e6e0893f1082142da3001ccf70. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZFZ32533295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8f64117c4c8c16888d4a6f774a59a3ee3f8a93a1055794aa485d364f7cbaf6. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZES62549132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f3bdc80b0f434b0598b869eb101af5d544b368669e8b5762c14deda9e9ac96. 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/QZHN72578737.