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 0xe750baed6b2f04c3985ae581bb69b6a6fe7566cc8a4db6555dc99d8590cea81b. 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/2b45222b-51d2-4aae-b0f3-18ca2289aadc.json and https://artists.proofprofile.net/proofs/artist/2b45222b-51d2-4aae-b0f3-18ca2289aadc.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 0x3129378382b5ee17438c2ed5ececa8defd886e6ea5d45e9bee94637d05b9dcda. 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/AUGC21500240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8650c23a7af9b2584aa3b50c66cd79ab0ec6152fc84aef35767256b3bde00e2. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/AUGC21500241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81dfdf16539da4b4c47261ce1e5a94e465db1f4036cc85fe29a8815da5273048. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL6951800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6743f792f835dab8d8199e2951a983fb3c632c70525e21f29a69a6fcac20fcac. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/IL6951800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4203c70fc46d401ba2cd00b3c06f2f9ca47863eff4ebffadebdb08c035b6295f. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/IL6951800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f32092cb76f0f7c17eaa418b4f783d4facf7ed44d84436a3e9059f7c6230ae. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/IL6951800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bba4f3efedb482a6f5fab31c23ced6adf0b31ad559cfe7d1d5f5f16327f449. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/AUGC21900362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe90758d2967ff77d481d5f402fe22091b845e73199e57ec680407f51229e63a. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/QZHN31972999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58543b810f57bdfe7ae72c36a47267623500af54f1a3b0b298548c5852e418eb. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/AUGC21900407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf826b2b46d86e898f2c4bba2f1a2dd1f6e017085c45e9a66fe131958c1996d. 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/DKZVA2100498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bbc7b83e2e5a5f1d9b7811bd071a9988c828d78e5020737fa4f8afb610ed23. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DKZVA2100499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a2de7560fb0864d1c18ec0c37a1d9a0eb92c7eb3e466395c97cbb8234b736c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UKR6V2270554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55c113bb21cd0ae49eae767887077888ebd416d58bffac22867a0e4715829a8. 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/UKR6V2380049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61065f8a738798daefce901dcc127283c5738fe19a06db197f6c1642f9016a4. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/UKR6V2380050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadeff6bf05be6df7923572160b4d8c4953b3a67c4b557f3a150ada77face0e0. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/USA2P2347866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c61ebe848ebf8cf5c04402c173dd3076a7b7e41239190b967603b111a06518. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/UKR6V2382844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2429dc43deb50b1f77304010442d63cb8677a135abc6c1e4c81f91075433d6f1. 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/UKR6V2382845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0bb4e8b07637905f2259e850b5e6b38610aad8d0bfc709fda966627772fdcb6. 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/UKR6V2382846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c44bf6151dcf01481baa159708b779b9312d25b116d05ecef530b10e6bedfcd. 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/USA2P2347867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4bfdfa7e71b58b5d02f13311ad1b6d738e2adedbb6e54852bf79ff4045bc55. 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/UKR6V2382847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52eb3758fe3fd94b934308861fb877724e2982fac1552152ab3637f340aa7f1. 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/UKR6V2382848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb357e0387bbb3c6da68ec684659d84f353d2d09e17b7ff156c98acf4b233d1c. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/UKR6V2382850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770d19f799590505cd38eb31dc1014aacd22dc0d3f6b3b6af5b34cedc25bc7f5. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/UKR6V2484059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8d31ef97f3ee39b41be086662e077af3d79dd275e42f940d7c3e8b14f02f27. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/UKR6V2580580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbab6757dcf6e60c30ca1d68a272b46b38c1cfd7763d45f2b72c08dfee3539f. 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/UKR6V2382851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b42b16457844c70b65f01770b0abc7d6034222ea4416787065210ca08168ce5. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/UKR6V2580581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f51debecae435dca182a69e9a5b2582dc56c8b65cd7fe449f5df7cdf5ccae58. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/UKR6V2380051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc349acb3ada2900eaee4c4e6c9b54a2eb908a054c91bf72b8c6e50dda2a28d0b. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/UKR6V2580582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fda8a3bef7d9ddd7772754f82f37d9f12e94e081ab4ad74734b58376964963. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/UKR6V2580583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e2cbafb7c8da83d252b436c353704648e8709fdd7c56a3a8dd458e0c4014ef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UKR6V2382153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb562c624f2fa2d4726e79097ea2a089be9387a9d2d9ad4fc0099ec961ec8de. 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/DKZVA2100209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4505137f54f740d7c7ca7fb0f324e335802828b602081fa638463be58817fe54. 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/USA2P1801627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b521cc2e64bb204e42dcda44ad1e1c98274844ceb6701038c9c22fd93fd8eb0. 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/DKZVA2300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b521cc2e64bb204e42dcda44ad1e1c98274844ceb6701038c9c22fd93fd8eb0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DKZVA2300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b521cc2e64bb204e42dcda44ad1e1c98274844ceb6701038c9c22fd93fd8eb0. 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/DKZVA2300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120b6030959020af0a8f7c1672326a4d0bb2e80814a09f3be02463b26397d046. 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/IL1042504902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771f1f6c69eb80fc7146ba5fc4ab0c114872f9b800ca8848f588a1cda499d64b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IL1042504903.