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 0xbef00c8266cb294cffc376c53d24820d8445ccd66290c9c23e6f811118e6917c. 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/f3bbf0e4-0ab0-41d5-9d17-729c4b1f413c.json and https://artists.proofprofile.net/proofs/artist/f3bbf0e4-0ab0-41d5-9d17-729c4b1f413c.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 0x68df31a1ea344de24699c9bcfafc853d16340915c1a3620b2ee67f30bbd020b4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/AEA0D2035288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9197170b5291a9e1eea8d84f4b94ac1e1b0f0e2556211bbf785f89371874d21c. 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/AEA0D2035289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b6366f00ad73cdfd4799efe9e9af9245aa93143defebcc3ceb31106c346c01. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:21:49Z), 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/AEA0D2042222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9519c1d5394dbac3f02cf7cd15f13ab07e695d7aaf0a0ce8d8dd658e250d4ef. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AEA0D2042225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b41c598925229db8c87b34aa0e4094bd05438af53da432ffc8af0ffca569ca. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:12:16Z), 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/AEA0D2042226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7458aa8b170193e8926e147c9dd72669b7a67b4f924557c635e9bd5e07a293f. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/AEA0D2042227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161f24bca681f7c8e1ec786c6bf1e4a033bf66f3d0dd494954126c27f0a6972d. 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/AEA0D2042231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8544abf32f993bb06abf8aef590e2d2c487aa17dd9fe6eb716e17da1fc368145. 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/AEA0Q2177182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35656aa187b4032be4070b22f77d7e72688b37c5989d1697a2422c196053dbc. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:30:53Z), 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/AEA0Q2177184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4b96b0ba68282dfeb3ce502c3c426e2c3102e4d5f950d2a680340f5d0f0278. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/AEA0Q2177185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a0e7322a7607cbca1fde004b3e2311c78c21cf679fd3ec96979eab84315f14. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:30:31Z), 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/AEA0Q2177189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84105f5a23ff922f1e5bd574ceb76a9a772a8e60fc1db6787365729166b3673. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/AEA0Q2177191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1c3e822256e0f1ee1270445a063b6c2832e973f57a5598c16e813f71e45731. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:04:10Z), 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/AEA0Q2177192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2602197f7df52aa3b14b120fe721d389bd006a48695f32d4b0840f03e351b369. 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/AEA0Q2177193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e834ad045efaae37ce96e5348d2211fe56ee32db54ea9eff84873274bd984de. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T16:35:30Z), 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/AEA0D2258349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d44a2d46079c3fa9aae91f79577484842e4b5e80e3ff4e8ec15b6442205f270. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:21:03Z), 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/AEA0D2258352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4703b6d649e25e92a5e2d80467a172002eb982145722813849c60c5f90a89b17. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/AEA0D2258998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbba9587611d8cf64526f537706323f18c118f9088c3e0004fbe4dc04d705daa. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:14Z), 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/AEA2M2163479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6346c8ba99f5509e795526e01a474ac67a9cd4c2e3fb2c94fd6fa52ef6e2340f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/AEA2W2310485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863b73365bc473b225335c43db9c5209b4054b22d86bd2577cc0da0544bdd420. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AEA2M2381049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5eeca8a719b23f0c9625c875c65ce167cc0e78e79b79abf331252ad1609d25. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/AEA2L2304122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155d1575d6308ca12dca67f3b99b821dcffe090738f7cddcf87e828cfe0ec1c8. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/AEA2M2422122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24d97df3d6d051807a115ed58d6643b201a3ffe4124973a9170dff073469d70. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:59:34Z), 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/AEA2M2432341.