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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a1d607357ed95ba303b12de93f07ee81b07a6076250d6c99f04a7564dee07f. 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/c47f715c-6c1c-4398-9550-290d20a45644.json and https://artists.proofprofile.net/proofs/artist/c47f715c-6c1c-4398-9550-290d20a45644.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2490e8b0999eace76966b33fddccbb45137393f1f26f7e6d49e9ed72d1ac8ce8. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/USHM80309607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa8c003b0bcc89f98fad972b4e22018862bc69181dcc12448267814bef25bc0. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM80309438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f116dd3dd93f441692b14df40cc2c0d3877bf3639f32cf144cab8704e985b1. 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/USHM80309439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f690200e93c6705adf7c2db4cf89cf71614608699890bb33648c1a3e90565c1. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USHM80309447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24af883ff1c5dd885c515f0d94f50ed0f750a8bfd57624773b095509fed8c49a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USHM80309448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x677fa4ae1e29283051f3405ec472f080628cf0a4ddf3f52885b481c5ab08a8e6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USHM80309449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7778a191a5d5f87cd8971ed87b2a6667304d94afed72c45bdb0b5a97059ab54. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/US62K0461892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c749ca37877dbc1572f9dfa8355b56979501fbade04c3126a0e3d4770bdc68. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/US62K0461894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4c9d68fd67963f9bd94a70636b883feb29cc0f3f55744b4b7482b7a6060d5b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/US62K0461895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f012061af09777c45d5fc7edef479ce9bbacd60af7f96b06f6660b8abf59838. 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/US62K0461896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9274881f04e596bf45d507e28e47234ff16893de58768b08c632608b855aa153. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US62K0461898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04f4a4426874a15edb1f3ee197d960569f8642072e1adad3258c0256ee3d0c4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US62K0761891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91515434f03120dafbcfdb14f0bce593bb64da2a5c633adb48cd4c9d0f86da76. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/US62K0761892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b46f91516f51f7e2e055f8fc863179ab08178f0b87b95ac160a53c6930e637. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/US62K0761894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587851f59ea0d8d74456f73465d7f4f26a4e4efe80b5c7b090138b92763858bd. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US62K0761898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f89ba69bddcc4d5b3df1832731e12839c06ed45b138311f5ec4271469634dc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US62K0961891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fc315962be08280614a071d44c03958394f2843386dff64e9591ff8630ea0f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/US62K1161887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407949a67bac841fd76b5113d162ec40a22c25636341fab828e0b68cbeb8360b. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/US62K1461887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ea252ec1d7c89888711efaafd0078fe2e695f4fa9462f22a3597a88e268617. 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/US62K1461888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875085e17148c960e915cdc87728d4750a4c1b43d7204701354a12b68467b648. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US62K1461889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcfa9b411033be8566ae1a9724887f99d8d50341290ca29bb08bd111fbb6c53. 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/US62K1461894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b71b7b8c74bad70c695c86f68bbdbb8ee42a5bd0cf2d4a3325eeb8eb2545230. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/US62K1461897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399e66772efc6b1bb1b4a08a2887178d37e31d6962d80ae699a2284247066eec. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/US62K1561889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf65fd6f32df7f61e797333f2c5712100702a02426b36826d6a20ec909388755. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/US62K1561890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaeb22d5897e679f00603e6ebb95e5446b0118df422c23ba33cd3eae383000ce. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US62K1561891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de90f92ef8051befa6178d5eb3e6af7b8c956c30aa351f0acb9c8e124bff7e2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US62K1561896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf945caaf05387876db7f7c81a4fef52d2d254e3c6454d1d5b645b6e1646eff56. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US62K1761887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde842c903fb30eb3d89887400f684f220b9e5fb17f0119fae00fb25a684e276c. 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/US62K1761888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fda718d72acdf218541d4a48385f0acffe5f99a7f257cc9e4b3f676b1a2961a. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/US62K2461888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa90722a99dd792f72e8af6d87b2793033a44ee6602409d5fb6696ea2b08858e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US62K2461889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723ebe7f12bf889e7b90bf4d78946754a793153c65ae3ab0bb33994c69a5d8ee. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/US62K2461890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f952587cb7cd264db42cf162238f4a0658fd8312f58475ccb440d0ae6e81936. 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/US62K2461891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f55c1ae492ee033af80fa5a7936f01506c0dbd36efcb2f1ed1f380849334aee. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US62K2461892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21d813d5ff327716128e8b7ebf6cafea0a6da21b7583cea9b161dd74d165da4. 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/US62K2461894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba28974aef66eba602573beae3a05295cf8aec580aa97a6e8637c3d656f9c86. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/US62K2461895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407949a67bac841fd76b5113d162ec40a22c25636341fab828e0b68cbeb8360b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US62K1461887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ca9f55c4ffbc6de343632fd73932e42c2d46d5f3475a4b1d3da31387d3f7fa. 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/US62K1261887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecbbae5b89c63550db0637c8f9ec6088dd923f42f6f9ba86cf06ae3af62a2e8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US62K1761889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399e66772efc6b1bb1b4a08a2887178d37e31d6962d80ae699a2284247066eec. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US62K1561889.