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 0xc5bcfb617aee7363ec744b509c99e7d2747c25c81206925cebaa774e9f604cf0. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12cac37a-a0b8-4ec8-966d-1c41e155070a.json and https://artists.proofprofile.net/proofs/artist/12cac37a-a0b8-4ec8-966d-1c41e155070a.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 0x2e7ce4bda87fbb50e28050b6eae45d6568c7eaa1983e9112c1a37b9e05c88ca2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:40:34Z), 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/QZWFR2428659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adb2948248514084d03bc98f582ea0a9c3699b3adf244057ce037b4d068aa09. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:58:26Z), 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/QZWFR2428660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7bab80006aad3ad14ac164f7b63cbf861ca2160b20b7074824d427a4d06ebdf. 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/QZWFR2428661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e314168631b2f3385b76a67d7581681492c7c1e95cae4cbbf24bb6b80870adb. 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/QZWFR2428662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87ff0d2d398d2ba3d9ff504fc16575987c27a32352a72b7c7d42ea13fb1b379. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:50:37Z), 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/QZWFR2428663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbaccc6b9731e69dd7d584815a895f1021dab350700b5bebb6839bb95062769. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZWFR2428664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e25b48d97d319dbdedb7b932724cf815235b6a90e8a8bdda5ba9e66ea948075. 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/QZWFR2428666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc904d6447fa9ff84c2e4953615beb85627ce8d6d48bc75e645a6c15a096f72ab. 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/QZWFR2428668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eaa30261e6c5707d533d73c82cee0409a9b9c1f9f9a7836b8d90d83ac042006. 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/QZWFR2428669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b33e09a0f9992cd1f66f8ae790227318ad72dae033f906b6bfae2c26942322. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:23:22Z), 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/QZWFR2428670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb41410d1d93b049bbdd077107f6755584ce65fe0fb58e45d42763e62a1f72e. 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/QZWFR2428671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01025aa933ad73a95577d154d07d315a4e88f854b09cdda510cda8ed5ec0a7a7. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZWFR2428672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec2c9b79f569dc6bed0fdca00a58c2f0feb99937c5c42b703d9f7a759344585. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:39:42Z), 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/QZWFR2428673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcd0aa453755e81cae4b479cc6295e3d19bd7aa2dfe63b8239fc169440e01dc. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QZWFT2459583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed532e9b78982a3935d8ec20fd8a6ae0fd4541044580ca99806a73bfac1dd696. 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/QZWFT2459585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651cc94ddf57736024f011638f7a48520044e7b4d0ea53fa840fee595c562846. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFT2459586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06a1f3b96ff8af7e43ffaaec5a44ece5b7a09b93cea2113ea9ea52753f72ba9d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFT2459587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6d2db3cc3a8c9b29f792f828b6d3ade7c29ab7a505ff0a229cf2de4e42436d. 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/QZWFT2459588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc598cc59fb86383e0f7cc08ca4d674a3a05dee5d1beeddda5cfaeeecf322ac4c. 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/QZWFT2459589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b2dcb29ece707b6efe374e5e39a607c6d25a4e08472f6cd2f1af205fdd0cf0. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:06:08Z), 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/QZWFT2459590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdf986d27b938f03a0f6d48a63cc5d96c0309c35349907b4fd46d9af6cd9feb. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:35:21Z), 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/QZWFT2459591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5275364d67e4f2ed84c798ee68847512a99cdbd6f6269296356de752b4cdd561. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZWFT2459592.