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 0x7a1a4a0a491264a6b5cf0d1be907f24d6d6f99b35366ba3019036bdc09b3470c. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b8e571b-b19c-45e9-a215-8649217fad73.json and https://artists.proofprofile.net/proofs/artist/7b8e571b-b19c-45e9-a215-8649217fad73.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 0x48b4717337d4959267fabe35b2b240a078844a73df618bc186b51c6dd96656f7. 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/QZTRX2304260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a20c80b0eef88e86a9610a3d246805eb914005d934b9f0e786f628f8c39a7c1. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZW9L2207261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f2edec47d6312ff2166f17d4733eca88d842cc78f7dafc421a4313c9a348bb. 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/USHM82273359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bb15c0438e784b5aabfce7b2e78832925403a5b2adc4238821f45e3906c5a2. 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/QZTPX2239217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa39fbc83c05be1592322236bf5550811d7d5679ef394463e8eb3b6d5592bb4. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZNWZ2129960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b3e81d1c3041434e7c46956d966773b8d3765cebfa293b86a9985e454b0cf8. 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/QZES92235834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08331f08f29b614abda7b9fc77c3b14ab66128df61441445b40815d10be0447a. 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/QZMZ92468656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29e98139efc51fa7fea621a4958441cb104498e437f263ff82a31a1c46481ee. 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/QZMZ92473355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed7f7964576029f96aeb2169d95d18c47d2869e80faf03e9657686c5142dfcb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92473356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefbc13de1053d639b685a51f57324b2682ed0fa8d9c8d1910615e422811a21e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMZ92468620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5524c2d041d86b7e7621e4eeb478595f98a07b256e3d4961ba864d2086fed651. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/MXD782302328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0c1cc938b486f556f1a857d8f725ebd0c3da6f6e7e4ed03ba5eb33e80d0c2e. 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/USCGJ2180669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918863665195b63e2a1c773bd2619f490539309a90c33a65448c55e73da945a0. 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/GXD7V2414778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8386310377b8872c1ec1aa143049b1ff621213e14597412a2861b4c75a1709ed. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE5752473337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba46aeeeaf012ebc8dfa4035941100fa6d57d8a17b080b13029a6c7942c048f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SE5752473338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ff8c2371e68c7cf9c13e8a59d77a995dd56ff469a27aea7e9fa8d6b853e58a. 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/SE5752473339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4192a249c1d34dba766dc93a6a20b786155e5f838d078d59d35433825db510a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE5752473341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d410ef192a1b27e4ada2d21b59bff981258d788bd9d2cc47421dc3a37f15f49. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/SE5752473342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78dc115d7c5f1211bb5bfacfedc422de6e368a10b4627dbbf487b398f4b8f5ea. 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/SE5752473344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba3c18ac17a5be0d0f844215b2ede7ed59cb5249798d16923d8c56e14abe802. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/MXUM72300188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496e525ca2d6a9a6394ecad7a6c3b954a7f7fcecdb4c8ec19a8d943fbd5d982f. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/MXUM72201592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be29aafcd8e68c46919e9885a5cc4c8755cee315f756d89fe26a0038c4263b3. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/MXUM72300618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7db373c3ef0ab0f0bbc0b6be01baf9c152ee6da8d717b6542598487bfbb25385. 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/MXUM72300448.