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 0xfba815e068f6912409b207c83a4437848106796f5349bcf93c1962467798939d. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd4888e1-5b33-4346-bc0c-1d44690de9a1.json and https://artists.proofprofile.net/proofs/artist/bd4888e1-5b33-4346-bc0c-1d44690de9a1.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 0xcdcdc7e4f8bcdd1439928b7dac239955c0332d9474fb002007174d08f84e6498. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAFQ2166270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b0600360bd021e525530a4fb6214bf64654995909a500cde483678bc016938. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAFQ2192018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cebc28295b443c07aea3a7873e3eca44d3628f9e08c462a971033bac1489cb4. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:27:55Z), 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/TCAFR2134115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7e966a5909f6f65e7a98ea9d765d6eb8eb97af56c0da455a497ab1f914b47e. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:47:39Z), 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/TCAFS2140074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb297e771b58eadc21360e0cf73e6321038f731397809adad6b4385539e0823. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAFS2139013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce166972c61468ef480b7955df9dbc818da9557a68c451a42615248d8ea848fc. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCAFS2178552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2ebaa245e0533ee2e279c988ebcb7207cb88a0517ec7046905b1cf285ff87c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAFT2143961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75288f7569e74608be6e0fbd0d0779ed1b9221885677f1324c1cbd0613ba7607. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFU2181974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ff5c5d706bc331a7b36ab8f359e768ddd333d9dbbd2f4f79ff226d8bf47ee9. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TCAFX2175328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356774d063058c7de1776e077f62fa5a9ee12a464c405a4cdb4d765b7bc05043. 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/TCAFZ2123885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47db11ddfc6b00d4553ef96cca87e94b459bcc36bec13cf67397287c29811172. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAGC2227920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2345ad853e5e4601f9c980ff31dc3f894ba2e61c8504618c0054f793412430bb. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAFS2117868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a943b84d0c86aec6a8386105b91562904bd7010034c506620be013df96a47a. 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/TCAGU2319072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7786ee9c077409535cf8657ab44f9b1b945797b685770cd43c68e4afcaf0aa1. 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/TCAGU2394646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf067a73c4dd72f24d7f116a0d4d4b63d2655bfd37fea21883b79e91e8e992f61. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/TCAHC2333419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2f158a9023690cefeab57ca5537440ab77f9fab155f5eb2b4c265fdf903fdf. 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/GX5MX2310880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69494fd31135235e9ac349b8f029bb1d4f274560f1aeed7950f6828f12cfeb8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:16:21Z), 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/GX8LD2464466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afd2043ae7091266c549c424a6075fdce94ca9fa787d4ffc068de86cbe80892. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:59:42Z), 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/GX5MX2423615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b56bcb9efe47f9cd474d8c7827f204d0aa4e54311341d6bfba165e50748de66. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GX89G2599388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaffc14f522e489362aab806d8a073aa78b2faa10eb3c26408e80fbc2b32c7fda. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/GXBDT2595412.