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 0xec54c3fe9f27e2415b0c1a50101038928df95a8c13ac1519b9f999df489f4b43. 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/4e76da13-8979-4b1b-a3d9-8c2a5bf399d8.json and https://artists.proofprofile.net/proofs/artist/4e76da13-8979-4b1b-a3d9-8c2a5bf399d8.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 0xf3b6ca5870584d018078e864816f83efa7f536f852ae7e3718b11f1180e12a66. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USQY51798881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedba60498d275094e4ca8c874655b9c16cb610a5dd7e823f6d1d3530cf1447bd. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:13:51Z), 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/USQY51798882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245d97744037c23baeefa5ef9d0342b7d2b45ece07aee4cdba6beceeee539404. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/AUSKB1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e365694a90ef85c62fc9c10b89c581c36be1b679d485aaece735e0773103594. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/AUSKB2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32665131034e2df3326ca1765a62fc527724ed23f0e49d9bc226b35784e1942. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/AUSKB2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32665131034e2df3326ca1765a62fc527724ed23f0e49d9bc226b35784e1942. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUSKB2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fa5ee6fde2ec6be07d9cc756edea30cb0e2c3908a9ceab4cbc11575fc64c49. 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/AUSKB2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919de68fb0c3a32e7fbfc7f60e7d4cb714116bd9c1704063be32b7286e3a416e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AUBEC2125787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec77a4625652e4bd154a14c4cb70810e4727b11f8a8b9d8d7dabd5690a88381. 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/AUBEC2169034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8774dea480a16c0df5dfca40b6b39bacb38b2889a4d585dadaee0f1316a27703. 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/AUBEC2169035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xface45eecffa492d9505c925944b133647282e3f80e0f81f24f513ad4385263d. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:38:24Z), 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/AUBEC2169037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81d48b1a11f54d3eed2dc7f98946015fef2b2c290b94d555b42dcce4589edcb. 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/AUBEC2169038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d696e1220322612eff40f587a58e17643425beb4afd4503b9340dee6a67dd21. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/AUBEC2169042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dffc32d855c67cd2c1d5a459423852866184c48682845a207598e6165fc4d6. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/GX53U2529291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0dfef776a54e47997694247f4206c47b770ba1316bba17a79bed8b14dc638ae. 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/QZHN52325256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe430208f29531fc07679047e31b748acc30a8808414f84884fa1f0ff21af53. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZWFS2479982.