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 0xb638c72436459c61eb46ad9e461a38ab30e76d62e9ac930b379e1b33edca8335. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/708521dc-0a19-47da-92bc-9132a447cd5a.json and https://artists.proofprofile.net/proofs/artist/708521dc-0a19-47da-92bc-9132a447cd5a.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 0x8efb518e02f1d5680dae709d71d68fc1e9857fdccf2bfed56f15cfa4d4b41e6c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZTAU2500939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e1bc554b2ef25a618366eef49a77b7e9e35ac9e1232c2cdf0a55a8ba91ceb6. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZTAU2500934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa680fdf7f7791188f2e8eb505bd1f40385813e7f5ae9030c5a22193224708e68. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:55:21Z), 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/QZTAU2500930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601dcc73ca0c8f5cce49ee7c8c551c583b6f4d8cdff389766e1fb8425e69db72. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAU2500950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d5ee8c68149114e48012fcdca9adf1ad5a071bc67c00a18910265e667ff1e5. 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/QZTAU2500942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3996b100e217bfd84e8c0ae0a151faf3181ba6f35f159b93710d6ec6033c4171. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:06:12Z), 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/QZTAU2500983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207b6371239e33ccba90274e49d12b56721ba87ed8fe30c238f21b83be412aba. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZTAU2500971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869451a7b5279270444f83f04d3bd1ae2c0b91228fe51202802c1b512942edd3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:47:07Z), 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/QZTAU2500969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2756c9df96a383b8fedc206154285d483e93f046a409834bdc73d1f7fd340c. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:31:47Z), 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/QZTAU2500947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7377aa667443bc10e76aa37cce7465fa1e51e2e6fc0c5bb0f27899ef3790c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QZTAU2500970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc975eab9e7f04f7d9538e9f354dd18b81221c24bc6b0371986577d4f3ee7980c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAU2500945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075909662cbacca2aa6aa13fdb4937b23892df1785c6e825c3c72729fbbdc9c3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZTAU2500936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4370e6c6be84dd618a8e2e3f40d0df11dfa47fc5be75f5c5a45d3ddd9f87b90. 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/QZTAU2538703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e76aa33a1ffdaa238b9bb967ecc1823c8bafc265ae49eead8adc29cf11af95. 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/QZTAU2537192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa728fdf5c0e7f61e0aab4630de196ec072c43e2eb262dcea9ff27626422ed6ca. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAU2538713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d08137e1cacd735c8828fa345b8983a0a7ca87301450f27f9da32a0d4d8833. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:28:48Z), 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/QZTAU2538712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85591fb6e20306b9c0caacec78374cfc697314a878ae279e4063339a749cc688. 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/QZTBB2598503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b02cba51b25dd9b6c542bc5943eddef01290128471b6dbf628f84e8b9a26b2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTB92528857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c00124a73340bfdc22bcb6de05632d03ec2d69328611922b0245b16a334557e. 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/QZTBB2583636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3f283100c58ab11136f0fd64b7555a034ed5c2fed24d11608ac9316f2b2095. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZWFU2575058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446ae757cf1ef7f86f10a8bd76793e300cabeaddae8b89fc7d978728a6e100e1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWFV2512016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744bfc14a52c9734106b9dcd9bbbaf2116e6b2678354fae24d6d73cad9ed99db. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTBB2597566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc315344551c3a5736e6f6d00955371311f0c4d5eeec3f589056654953fbd3ae8. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:34:35Z), 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/QZWFU2575003.