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 0x3cef0afde39df7bbe3052bec1b6b43df0e4313dd79b4b95aebe0a05052b88816. 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/8dd3411f-4725-4e19-93de-09c2dbef63ad.json and https://artists.proofprofile.net/proofs/artist/8dd3411f-4725-4e19-93de-09c2dbef63ad.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 0x6f89d108c1b0d94c396dde3c68fcf378cead90eb96c929e7bd9fdfd4cc8f1a72. 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/QM6DC1551564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8488050995db4a8c1c2468136cc0f1662c2e1b4a186960e1292495050a1b3e83. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:57:17Z), 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/QM6DC1551567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87222f45a11b40fd392a2af6eb8845a77bf96d1491a58d70176f23ff246aa2ad. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QM6DC1551568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0314a565695f538c8854fbd19175ca42ce656dcd1ecb030e7c3c52b476e988f. 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/QM6DC1551573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f269f878ac25acf8efc50737d226d675806efb6a37570624d9fef6afab21d33. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QM6DC1551563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e29fefaa32ae5495798a93f66b4a3f830e51bd9f28f3b12d0a3e197cba2d63a. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QM6DC1551572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0314a565695f538c8854fbd19175ca42ce656dcd1ecb030e7c3c52b476e988f. 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/QM6DC1551573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc314ea958e483245c27c9fd2fceae0dfcc9e0a0d28853b27bd9770ca34531ff. 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/QM6P42525911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5348f3c245486c7034b36bc6441e5ec711a6ffb8809144732767118a39a2864e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QM6P42525912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077505f62fdcfb6a1313e0a2d228ee010caf55cb85dcabf1b70a3f49eb1f2db1. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:14Z), 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/QM6P42525913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee03874bc0f5a415cdacd69c6994fa4df8e40f26c628812c4f1fa5e44ef09b0. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QM6P42525915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42b306cb6a1cf5a38b6871230cf13a9d9434e0b8eca0c516e38e9c620d91a20. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:44:01Z), 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/QM6P42525918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cf4f26c67be085a7ab823472a4ed3e506a7b0b8cae8300af94f264c25e924f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QM6P42525921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85478953fb076aeac0be0bb65c6002c9a8d2436e38149d75c368cd10dea5e80. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QM6P42525923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf87ef7fd2f9dde3f1111709cc8a4b528dd3f7714b807beab277221dbb61fc39. 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/QM6P42525924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c03e8ca2ba991993c5f426ac9fbe3a0c25f189f2190c3e4a9959dba675b7602. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QM6P42525925.