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 0x396e3ce295627afd394060acf34e02df3bba31d360d8d804d50e9b1300bc41f0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/765ccf9c-7a7f-4b05-8fbf-46ae404ea772.json and https://artists.proofprofile.net/proofs/artist/765ccf9c-7a7f-4b05-8fbf-46ae404ea772.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 0x8e855b8f3c3d5196292d446e949008d72b5c2fa9c94c7c1ea8c06e2b67c9aab6. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USL4Q2005925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63006e2b346f6b57222137790649dd526e05db5b1d48446e460ae43b6c7ec6c6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:53Z), 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/USL4Q2005926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x555a699333697842d32dadee5b04dd0a932fd61d97f187537e0710a3021cea77. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USL4Q2005929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25df1747814e9718ecf2ffc947d9385bdb87274db2b62a30278c0913aa712ac. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:50:42Z), 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/USL4Q2005933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4507b75d4562fd459a9d09cf75327f73be2a94da591b6b9e8e1f3750c8b95ba4. 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/USL4Q2005934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b919b0458890037569f0179ad10937d8abf060c8caeb38d6b68be6fcd901f0a. 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/USCGH1625338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95244ca728f75026b67bebf396f589e2a65556c4badc5116e9d3c2877e69031. 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/USCGH1625340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f5a2fcb33ceef224b5e47e8b8d9278548e21800022c6c4882f2931dc22e1f7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:54Z), 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/USCGH1625342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4020544c80b9bd551c760fd5137a6422a42b8d58f3f624076032b1a6cd37589f. 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/USCGH1625345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccd1b8230dc7cb1f05d393ec53d4056736dc685e018511bb381820cdd0fd135. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USCGH1625347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa745188df7714ed1ba8614dfa9b5e1f3468801f5e5c2dfd6d25b5ac52018d3e0. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:24Z), 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/USCGH2020247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c962f2eb1b04f401b18851efa2085b50bdebde0507a9ee9f5818d5a96f08e4f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/USCGH2020250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38368e98e037331536788bd453b9184fd5aacba11b0e2cb11871a9784d49d3a4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USCGH2020251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8c9fe165d84e9a7342631e85269d6ff775b13d4f873d47aa346c286b263ba5. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/USCGH2020252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5daaf189a7b22cca1fef074a726cbbdb59a83d5486b4d507466fe98f6a5ee6a4. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/USCGH2020253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa129a493457296af7fa0ad086ad2e056b0350076b4a1c61d1dfba63f4274f1d. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USCGH2020254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e1fd47500c319dd7ecfd6f16f9340a9c09fbc0da458ccb829cc6d0d21cb1b9. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/USCGH2020255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80930279512fc58d3742070bae327737765bd64c3398a28d707daa6e0275c6f8. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USCGH2020257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65b82abd9c6ebce0c2a4d0af78bd3311da09ad27bc53f1d6c73647ca368175b. 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/USY282009669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf6dd511eb33924ee2fd08bce89554cd18da7ce3cb080b81773bbddbad08632. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USY282009670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cce0fa66c92c77e6859272d0654efa9bfc38db7381d6c76231debf2b6ef0ce8. 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/USY282009672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a67aa0a31d22a311a6a5b9b44ed1223aaeef5cf18ea67fa8a16a3f99a8aafc4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USY282009673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f34ca6c607c0f82aafc70765083abdc4ac63fa1e0d943b305762aff6ed0f0c6. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USY282009676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeef0ba6fd1d4949a6b528d9c7d46c5a00ff6a4209c13d7f722f711bbdf750ee. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:53:05Z), 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/USY282009677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459d99fcaad2c943c8ea6bf40243f0dd7e23cebc8d9768599dddc3163ae08f73. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USL4R2118779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402acc9b45822d10c26185696d9dca11efb0baa6ce4b7158e4559f10d393fb5f. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:20:05Z), 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/USL4R2217609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabae171eb4fdaeb2b307c3ed98bc02c8567e17b0f5bad40e13639ebc10b4109f. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:27:56Z), 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/USL4R2217611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9916f951f49f9f710c75425338a2e304b4d92feb4e6b6fb0e5508f4ecfb3b882. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/USL4R2217615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9333bf025ac1f5b1dcb72f17e3b0253febeb27b9ddcb3f7ca20bdf4e905fcda. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:47:25Z), 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/USL4R2220561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede69ae675312c504c8748ef62a8d41b8a8c2620ef6029d9002fc5b49db8a65e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USL4R2220563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5685aee22a8fdea742e4e07a8924536ba983dbd2a75101881e6834691dc093. 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/USL4R2220565.