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 0x8024bcd272d7f5466bcb4807c75aaa53b9459bd62ddc0c62009bdb126b6fa81b. 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/5eb32d17-fa79-4976-8b48-b6b18d2dfd68.json and https://artists.proofprofile.net/proofs/artist/5eb32d17-fa79-4976-8b48-b6b18d2dfd68.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 0xa24b5c515a7336bc6833358d69cb0b925d72591b66b2cd48b1f428320585e359. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPZ922310122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32914bdf93b5d27c18fcfa3737961d8b0add572ce93644d4b0096e601091beb7. 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/JPZ922310128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1932f6a82f4dccadabf5d3fbf8a747373ebda45cfc5d9ea4dd78fe0c9c3fdb14. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPZ922310130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e0cf02a459b36b1406d880f890af32fb3358d5adff959e962891fe939d03a8. 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/JPZ922310133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccdf72ac8f2a5087a30e224277032f411c461fa05d3b8a4d69b8d0bd5a4c296. 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/JPZ922310134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcbc53633ad04e90114f7a6386b6af5e254f4a3511cd509b1ef3c046be527ac. 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/JPZ922310135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102ae1a4e3fef786230fc04bb16bacb23baf9da7521dd2fd5c3133fa32489edc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/JPZ922310123.
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 0x65f3fc31ffd87a7e0f2948abc1fb59ca7a0f0ecab8120d7e4c332d84957e871c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPZ922310124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde3144cd65bea735bb5a06579ffab2c5a958e67eef010e284ea7333d8ea1679. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/JPZ922310126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a52ecfe6fdf059454e12f4429dea8514b40e86d5de92701d40d34efa03c4f3. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPZ922310131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc23e9121750be7b73a20bcb0017eb0102a908af17ec977eb5c380927b84317. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPZ922310132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc53ce8aeee5cf1fc908777e1088d0b6cd6764e13918c73667618840c590f8d1. 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/JPZ922202588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2baa9ca5844e565ce2078cc878263d7a3f304079b526ed3adc00e083fc3dbd3. 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/JPZ922202589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cfa12f412a1ad416fcad3e874d9d09eedbbb5360a58c99d5ad7160fe6a9707. 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/JPZ922202592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bd7d451bb326b966d322cc126645ba5d6d615e3fbe458581481f5393f1da6d. 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/JPZ922202594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03fe6c57d040014e20f5b55f61812d081c617d59c7bb354a013f155aedf1a6c9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPZ922202595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43685aad0ce6fb49092c6ac7d7db7fab6f3fe4523ce6b2d0ccf1b217a989c129. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/JPZ922202598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614546d761832198fca1688ca7708e4881615d9826ba680829fb6b9295aed1ab. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/JPZ922202590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b614d7fc01319bc61b7f736a513253ce14a4aedb667d989c4ecbfa4a4da129. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/JPZ922202591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07b2dffd9564f6da2ebde7d7e816d1230c7ef3f0be69711cbcd1031cbb15464. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/JPZ922202593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa630d7f616f950be364f85899a04c30b80ac1c0fa66bf9405cf404734a3df15b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/JPZ922202596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e1dfa71de3b7aa4d033b35e919606ba25cf46890bdcbb9a58175670c8a4d7e. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/JPZ922202597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3f8ef78f8b0eaa85dbde3083640b93581517d6d166f0074e7d902a97f56dbf. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/JPZ922202599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b7f3aec36313d30dc3ec6743dd2f3ed9450de5df89387311df173bb64e94ae. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/JPZ922202600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa03739f3353b65fd11f93c11c106e6501a40c92b0b3333bb2bb80819202de1. 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/JPZ922005985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fc96d63f2807d066a790eee0763178d94f7a08282bf7d4b48ab95e7f5b3dc9. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/JPZ922005986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0095e5818baeaa41bc64ee2baaa4d33d22e8a4ae2c14fd4ccd785f37b34c4a96. 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/JPZ922005987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cbd9c826ee015b34a76e22153f0b8b4d4bcf35e34fc90fcb89f5e5ae3507c1. 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/JPZ922005988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf37ce1fe5a4355f30ac9c3315edcc185420d62b487e145c407127cf488be60c. 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/JPZ922005989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf487337cf12df92c6460b6ab7b4e9a8d0da62cd4cfcea538f81811b1d8f8dc88. 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/JPZ922005990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317be78bd6e1f433b89c3012043bc1b4a6924ab96f65d05062346f1c24b636a6. 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/JPZ922005991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c10dbfca43924719917a68273db2fc2a4d9c2f9b15304a12b3156b3305ce0e4. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/JPZ922005994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8893061cdfbf4d4b99a9e476284004efc38afbf158fc1d46bcf6a133a2c93b8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/JPZ922005996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebda5eff050f1397f2cd149e4511adc68bd050f1c717d21d059e23079af787e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/JPZ922005992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518e10062ba89731f61402ee86171f2127263ecf08d6c4fb97064f2b196d2e16. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/JPZ922005993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634a3930953eaadee0edde12c0b0cab52f66ab5e3c371daa0087299fe504f0e6. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/JPZ922005995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a0b410e833aac3089e46b57b19208804484ac9c44c198b23dde6030343c690. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/JPZ922405140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab2d1ead70f4b19f7dc6a3475087ee1e52660d5ae6c1338df9a21ad0aeeda1d. 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/JPZ922405141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485425eb85270ba33f8450cfc03ae16fa6a90f10cf9c39365b16c715e394f5b4. 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/JPZ922405142.