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 0x91e6ddda74dc458df94b69b67f501b29a59dda5c66793c137b87c827b0c6c627. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f95f4b09-33c1-476c-8690-ee7000189ad3.json and https://artists.proofprofile.net/proofs/artist/f95f4b09-33c1-476c-8690-ee7000189ad3.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 0x74f33a48270b48b96ba761d5f2ce7193f58610cbeed33b82d3fba11c5f4bf2b9. 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/NLQ8D2101486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708290061d41cd46d68c2b485f97a1f41a7bcf1737912f0a5921aec2c316a76c. 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/NLQ8D2101487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3138a3b90ccf2555fdd3f411d156c862a9205aed15062a94367381d2360a0a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLQ8D2101490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba6e0c0c60f47dcd32af385ce455d4586efe6674d95e41ba9d33ea95c845649. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLQ8D2101491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c93c9c0c6878d189025687523bdf053c80db5c12fe9ad9c0d4cd01258696858. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLQ8D2101492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b34be9bac47601b2be5fd9c940c68a5c847f5c73acb9f59d5042af69b7084f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLQ8D2101495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf864ebc8877fa596eb1b546644201e3322c3d68c850d40ae2c4f928a1cf0fd07. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLQ8D2101496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa946b389b6f8d783531c0983753f5bec89c44129de0eb4a630a31afb491f5d67. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLQ8D2101497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b3108894e3bb1fd647f8b6f74876c28ff71862cac010a6b1f3e8d763ef5d90. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLQ8D2101501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19e092f30d35e9b8d70e119de441ac5349a64698c633118d2f4b6562e932a739. 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/NLQ8D2101502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871cc1659cbc4a5436ea8c2f7333a1395a47de7bd5617cc88a00ca17d99bde69. 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/QM24S2307249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35454859d8080a371795c10c1740738c6f5f2fff1068f7fcb16443bbf29c490. 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/NLQ8D2101032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea4d7fdba2498ceca6c8cb9ce92058a6141ee4858823c28cc93f785818924f0. 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/NLQ8D2101048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce2fc7ab63c9684c3726dfb1c4ff83559878a6cf72f0460391bb8a59badb19d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLQ8D2200498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4916113de27a919722e25770b441f12410be1169d4fbdbbbe750707ee891ea93. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLQ8D2101310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2a4a2ce67aba5da16ab3cd27d01769a29ee7b299e09d266c11905e67399187. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6XW2427290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31923d99016f245a6e3ed69c67c9b103be3f56e31fd13a2b96200f7e344ac873. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-21T16:41:07Z), 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/QZMHK2457635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbb093647693b900487f11cefb3875cd836fd8bf79d94c497da185ea9615f9e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLQ8D2101332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f3e365a79e6383872357ddeb485c1d4b10eb0f54d0a79013f79d7193de338ee. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLQ8D2100343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8647f3a4eaf078e4469f05c693ec45d7a2c8fe5539348f8c2a072943531f87. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ATEK02177044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad077a634a47d6589edb94bdb1d84a436e0da296a5e7d55f6585b50e2bb3967. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLQ8D2000355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acd38de47bd7e0eaa10d13963649bc7f998c99701ec1e8eeb04de9ff37fbeb2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLQ8D1900692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166f9b18be4b0e0338a72d4d7e9d600b1e23408ce80ec5833799f37d4fa40e9f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLV62102360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b2403c519f874885150f1b99713a947a67be595d0e07c26b037ff849ee8c13. 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/NLQ8D2102198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3cdb93f7e49b95d8f7d0fc5312bb5d1d1844dc13d90e83606bf5cae64c0f3e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLQ8D2102200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fdcb352d1c5b3aaa50787082e3419382255bfd2741aa2c3a79514b0b70a268. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZW9M2473290.