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 0xcaf63e93653750be76a3870157249dd974c46c250bc63cfe0744b236462da3dc. 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/1adee2df-aac5-40d8-b855-74d5ffa5218b.json and https://artists.proofprofile.net/proofs/artist/1adee2df-aac5-40d8-b855-74d5ffa5218b.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 0xd638ac5a8b06cce00e483963432e3bc1d7bbca1686147d0c47f7367291821676. 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/NLM792300127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d268a48d6a8c10b48e4d4db89c2f44c2b6a27dee33aafef6dedf7930e0a019. 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/NLM792300128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb853fdff194874c03251b00a2e6966aa7ec2d071d7ccc1d3369a8273dfabe37. 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/NLM792300131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa62c47badb5c7b259d256782e66c6c0e8dda9a21dcc0e4bd7f661342e130c0b. 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/CA5KR2456868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d667b2cd69d1193f1bbe2608e6905b0a99790cef1724add57b67a39744217de. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:07:50Z), 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/CA5KR2456870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ede8b5e1ee85a5ed9d8b2df99798837aa08cdbbb2a9640c1c778fe5136747e. 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/GBKQU2483645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7679c68d47187e9ff0a1d812a2e942822f19904ef1eded9636ee25fb9e0c9f73. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/NLCK42419572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36761a683f56ea327dd8e26406dcace089792d64161179aeb346b00032ff4ae1. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/FRDX62408870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001f26d4d09bb85bc4ee4348a4f6056f21e1152149dd82706c07cd873e584497. 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/NLCK42419147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a5dcf9e00910b3ebebdd9da83f58471c2c1d0acedb94b3a61592fdfe27665f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NLCK42419148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf444610273ddc0c6e7aea714a0956d61715d7c7a7f658c281a0bc3896b334044. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLCK42419146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e266e070fa1cc37daa636f53d759b3d210bc0ae057af7340ca066983aa7dd3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLCK42419145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f91ea94353c0b6c55ffb50898ee666d3eaa7a31b2aef415f7673f5b23a8c34. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:47Z), 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/ESA092506582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0867847858a296961d85e94946f813347751c0b81af208f6ec283853d53d1e2a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/ESA092506583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08321ad9404d15186a26262a41982fcd0a7801773a95cf5a48974f311aeef0c0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:32:49Z), 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/ESA092506584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf405991251899779a223c32f58f81b1d12879fa231ee66c614d1d205bf2be7. 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/ESA092506585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77d30281230ef40936b34b789129ec3e25b9dcb1fc874e6801be03f201c0ac3. 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/CA5KR2532589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7bfe8343bf7c3d82e10477f9353ad632b901568094dde9b37cc5b2e493b111. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CA5KR2532591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8332d2840d67ab4b5018b6c45feccb3378a2b8b11563dfa2cf0211f370a3b4. 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/CA5KR2532592.