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 0x3967bc605ac85ad1d0adaf36eb0bd5f0ef49cb946ab43c273fec9eecc2d5a696. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/adce074e-88ca-4ef5-9ca7-5f5069746fb4.json and https://artists.proofprofile.net/proofs/artist/adce074e-88ca-4ef5-9ca7-5f5069746fb4.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 0xe5caf5cf532f4cc16ba04b61d84cb8175d709d62f8d01d7df88057199b5385d1. 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/USANG2218993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb41b40ba510092e75c51a63e5ee82838b7990cbc92386b0ae8c566a8912ae7d3. 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/USANG2218996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8357f7c8e134f510210561d4eaaf394ceca49076b01302be8344837d99cc31. 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/USANG2219147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b93ebc84709ec6c6b9229276c8d0f825b51888777a5a8e7a9aae8cc37265a98. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:47:49Z), 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/USANG2219155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce3d524819ce55bed9d1b7db180b487a4ed235d18d859c7d313f2d32bc5a88d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USANG2219515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdd7d85939bc2ab84e9d35956122888ec4f1ada90fdec8f4820f4416827840c. 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/USANG2219516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643e0ed6c3a5d5db4824696df2eb53d871e605221c69da383cb77ad016fb80ec. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:50:38Z), 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/USANG2219522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83da179b11b6292e5f6223fe6f69245d1916c6501fe579df90dfd477ec1413d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:40:04Z), 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/USANG2219667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe473005ec3e74f96538792a82e87a1875a156fa121111af7f034a29bd13091ee. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/USANG2219669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4464f78ddb8bdb5ef929a2dcc6d15916cdd8d83adc3e13ad9fe3d3a58f9bed8b. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:12:01Z), 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/USANG2219670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ddc6e389c4fbcf8dfe67dc2a7b014034dc0e5d8a6361ba2c319bbda758b336. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:39:27Z), 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/USANG2219676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11856fa2d8d856f1e4c60daed9bb45ec044fe10ffa1ce5a7d025b175a2bd3a6c. 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/USANG2219677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaabd0a725204ae9c218e5ec09fb8532f56ff2c5e94b4dd7e01e828cfa6aa0d6c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:01:38Z), 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/USANG2219678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6acb026171bf1fe74e4cb0a1703e676d44d764b4ced1ebb339610b65cbcb5b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:03:24Z), 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/USANG2259152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bad6444997297e39d4e37d59703814c13585a40bc090ecbdd6e675249c7af77. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US3DF2441830.