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 0x067f95caa610ece42739fcd648d5e9884b8db07abaa473791c16933ac248dac3. 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/4e8ec1d4-22e2-465f-b483-dea65184b2f2.json and https://artists.proofprofile.net/proofs/artist/4e8ec1d4-22e2-465f-b483-dea65184b2f2.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 0x09f78685c71b3138fc12232f8efb2d0b462af8b5660d510bf3563ade0ae59943. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FR9W11619428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f018a75cd8c5d4901d46ae9b17349c042f5ddd4676a2bbde5d86ccac1da83a. 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/FR9W11619429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30d851ac37162a2f3ca4f84bf9adc3212a22e6e1bdec5a0e1f2e5a307d948d1. 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/FR9W11619431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041af5215d31f43fcbd92d9340d93ab8c8e4ba4badce598cc887ae879df6d3d1. 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/FR9W11619435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b73f9e9fba59eb75b2541dba0f334d15b16ba6247d0e3c2981ee471230769c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/FR9W11701946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc8bd4007cf579d747f6aece1ce2e1278ca436bb9c2f1d941c765a27f7c2501. 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/FR9W11715494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f3916bfa8ce880c4c4bb02753b3a8707fb7b93434ce4a99377eee6fc813557. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T13:26:15Z), 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/FR9W11715491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c207cfc67a56b01a51b148c795f631174a9fe59c0065afb7e768ec1adfc0753. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FR9W11908017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca73ba5b2b29bd39b1b9a9e168b76058873c27d3dd94619a67f514649d09b241. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/FR9W11917122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95c6b7ba61d7892dced4094c59355eb564cca3422b35ee53beac4603517e558b. 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/FR9W11917121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99b5fba9a657cd9d1b0d89842f394fd2786a75182d7b10cd2175a43e82db7b3. 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/FR9W11917119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a0cc3ab4cbcc16eab76264896e87030da53ad6c2160ca1b7e040edd6656367. 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/FR9W11917111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda604c1f1f0e3f5be35d2b45a056d085d2cb19adf6e1d5498272ebbc893dd4ee. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/FR9W11917118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7942d3d0bbf578d5a6ef76d7ae99fa5bbe37626808ef7fcdedcf594debe3bb. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FR9W11917110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0969379f8b13ef16c4351b9ab459b51cec149e2618435c2b9b6a9e5c01981876. 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/FR9W12010870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8adc245710a71b8462346766312841513933ce0e0642f44f7d33551fd4025265. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FR9W12015883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000dc68b02bbc714b23889d309d0bd3a53bb60c9e9a9a25bab55677c3a21fee2. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/FR9W12015878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5744dcb9b4124d4cb003ce38f7fef9aeb0f4199bdfb3b92d504980ffbdb50d72. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/FR9W12015882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd0d7cd48ec5e1fe676c9ddf2732a30892324e8284f3d588d7508db6ef80d7f. 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/FR9W12015891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1940c15aeb9a51135a86073ba34e8e4b3144af71fe4b3a24c9a5f7369d2c3d. 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/FR9W12015893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b87110f4df595a5d77a3e810bb83e53ab26b50014d18e697b924beb84a4b38a. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FR5R02314083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6d3a67af84b4986d640aff67567073b61c9d3ebc7d72bc1da859b0e581f945. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR5R02314160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0424b416b8a7cf1e11326c4b7e1e31ed15d7138ba83708bc0b79b5fde77d47. 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/FR5R02314204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf95e909f14e6c28ed5c67f313fc1314763e39fd4a3bb32003682c51296161caa. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FR5R02314208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cae70356fc5beee7602e9ab478634ece6c55b656209585b656f728f9450adf9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR5R02314203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf5c5fb8261bdb03cd7c512d552f5a0ffb67506e402d4c7ac4c9d1119f18e7c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR5R02314207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7ffad61266a9f22b4a142edafb04a2ae216043276ef4f485e241ce21cd416e. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/FR5R02314954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87862765c027fb8cb56e894eb4584d6f68ea9ecb0568c961c97d2b76050f819a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR5R02400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe657cf0ea9f09ce9f50fd225bd5b78e56a6c49d3d989be8b2483a2607d71328b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/FR5R02400582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547621bd639aa17fadf0850ddf99f735dd8d53b0252f813e1abbc387d28bbcd9. 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/QZTV32435407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd839ee7d7d88fb31f8be8f5eb58eafa8acdd1d38c02b9ea8c33c1a9e5e282746. 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/FR5R02400907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a35f8c86623005fc6dfbaa0de7a67d7c1072631c62c14496bd58652425347dc. 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/QZTV32435387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7997ce7cc1c96f7fe164cceef331786c2fd85899c73a4e7d36f243d62913b508. 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/FR2X41900916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800ba297358b533ce001431e2e64d24c25fc753c1217d2080b68932ced0311ba. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FR9W11711076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736caf0b789a4defb42c35c20a0c0cac8f758ea8ca19ee5d910fd42328e35350. 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/FR0U92000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe765915d4a315610e1d7ea3a1586f8aaaf3e6c8a162d16c463ebaf7bc68869. 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/FR0U91601333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14392499feb3edf45a3329e16460340f8e502bfe903832c468ca7b6a54bfd079. 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/FR0U91600715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8254ed947d4822f2387ea69285d2b80b7c255e39e260f2edbdbaa62dcc882e76. 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/FR0U91501195.