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 0xe6b42dde13dd6260ba19011c85ec92276a2ee1fdcb5c04965e6cf3567741c3dd. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ff3982c-b257-4c71-9ead-dccb58b23b0c.json and https://artists.proofprofile.net/proofs/artist/9ff3982c-b257-4c71-9ead-dccb58b23b0c.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 0x645c989d2a596f9a32b2b18282eb43429e43ec1af2ab686ad1082fd5bf3ca507. 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/PLH871300599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59ae4a34ca5d5c01fb29af3068e4ed743380f24cae26de4b1160cfd2d697059. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLI369876960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1078b6173382bff5fa77de2b7a02c27395d508f68b64388957138dd3408f0322. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLI366767170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b922df29af53bbf6ecb5ee6498db2691e0bf8f5902a87bad912bd0315552a9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI367659550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf97c65684ccc158c1b9805f5dbbb88b0d1de4ba44d930c16d59cf4995d236b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI369046900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d86e8e98fb06b498c428f305ab13515c0cbbfdc28460c7eb5f99883d6b85f29. 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/PLI362463080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec48508fe57eff8dbd5667ac7a92bd81fa348cd88da0713ed6874e416edc9917. 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/PLI365926400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01721080390bc986b1b9fe7da8e9990b6cebde7fe4ff73466146033bd2d4f5bf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLH871300620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ed19ac4e71b5b4fcc910d83a85605bf5f4da505a1f262e289eaff24dc92e4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLH871300607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac026836d9ca98e499bc3927d9feb84d2d14bba2f07eab0401247279a97a423. 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/PLH871300615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40c2eec44139ba1a784f6ce6909591fb2335d9cfd0690bb41bb823a91421aae. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PLH871300167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0584d4e7f3ce1d765953f23639868b723156531f4a0b7000fa079c7f15f1e5a. 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/PLH871300168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2534892bd5596d9b38a24f91f6e9fb2fe124b2d1b389840da3ec8d86ca0a350. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/PLH871300178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4ccaa9b205d9c4b513642e8d83129325d6385564d1eb60bbff67df2f87b191. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLH871300821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4221111d03e3dc4ed5c28bb7981fa4d8e94fc542f6999cb00668c460b50fa60a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLH871300824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9a102e35dce300af3faa00876c46cdaa681b83a37dd8d20f2d223f090290ab. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLH871300828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525f235e63552e5dcbc73e565e37e3709ea7dd2828961a13204311fc8dfc9eb9. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/PLH871300830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b6ce270e6f5cc3634883eab5bc93f82154867927716bb915a5a2eace378d92. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PLI368168960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c16bef8a1633efd61332d97e523590c0f09a840120f1d30830879c6030f82f. 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/PLI364777030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66eb5facf12f61101e20e790f3ac716e9f3b11f3109901a7a3ec6f5b20f5085. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI362636850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00d843bb54e350135bd391efe1829b80292327c4397ab6edb0ebdbe1ee650be. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI369297711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7683514c77b3fd6372499bb168d523be02bf2c1fed315c6b9fb2df51336bb96f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PLI362636860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003940975b9c0676b1f2652e360c958a75fb32e24ddc3280a32e69f3e830b13f. 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/PLI362636880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6072eb3f6e711ce61080ecef60c16afe9e0662478bb57382aecd26f4d0cc33. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI362636870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9831c05886daaec030b956d63dcc0fbf19f1b5151b33b66f08b8d3a11b68d8b4. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/PL22V2313001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7fda02ab159de7d8afeb56153921016be715fa32f29b77a23c18446fc480f5. 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/PL22V2313005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0248fab6067d8429c8262478de854e67c0dcaf382416f1c5dceddd52742ca714. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PL22V2313008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2407be7eff9986e323ccf1546a4e630812f162e308018b32c0a82370aba19fa6. 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/PLH871300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4d8dab1bad056d870e74d19ced61da307ff21d53584697ea2c6ec6cf016d3d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLI366122780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa72df43183feb16b55be7598ad76c0804bbe15724b23995f911409f12174536. 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/PLI361115750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59ae4a34ca5d5c01fb29af3068e4ed743380f24cae26de4b1160cfd2d697059. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PLI369876960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf154038357eb7f1c8d0b78c26ee00973f4030710db4a833fa3ac0e7c9c927a7c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/PLI369785010.