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 0x014873745e4a3be9cd695eb7e81c70f1012e5e319651144f798401fcee342c36. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d500ecae-af3c-4cec-8b2f-e04e1e123080.json and https://artists.proofprofile.net/proofs/artist/d500ecae-af3c-4cec-8b2f-e04e1e123080.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 0x34e3bc0a871ea83ea71c0365587ce91d4ee0d9f4065911154d580941d2b04cb6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWR2259717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8609d10b9c4610cce3690df0ff3355fa19ed34a80924541d53d1ca890909bd. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZHN72302282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197bdb7ddeb182b2dd0c1f9f7eb11771d698c80eef1ad1f09d2f5eecfcf0cf15. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZES82322967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84fc4fc5a653c07c79c983998508dfd1e052ad265c043829e7ea9006dc63a121. 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/QZMEP2324141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43cfb6b10f1cbc45ecc6a622757a1e9267d511cfd24e22a721e2193684ccff2. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:54:50Z), 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/QZFYY2466691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094741dbf068261267c2a023780aa2894cfb09d34beb37020385cbb9ca4a85b5. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZNWQ2233186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94aaab13cea150f3575199e5b7a6512002456fee38654d53ba01da7b3486306. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZES62440625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19419ac9ff4c129f5fd6728241068cd7681520b89a6afe5252f2eb9dec6e3a0a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES62482953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca3b7143dbd8f24f23fbbfa1ea760c73ef38417a85b14c89a8e88145f902fe8. 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/QZHN72430306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69e952a784347843c21d7924af5549f21a4de71ac9bd9c226f9906cb4bb8d20. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:41:04Z), 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/QZTB42487882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc3054950008a787696f968156dfa1bacabe0224b56c82842ed2ad1f498023a. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:55:36Z), 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/QZTBF2467739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3891bc621c9c381bbd1ce95040fa55f9f6a974de56e784695f6b92914781d38. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZDA72529354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccb89a1a5353ef4320ecdb96c6bf6a9c628cebfd0adc6922129b7419052fc61. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZDA72525272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1348ebbf7d86e68ca9d00c19fa7b3103aba7a2e5df39387405bbe698855a4c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZES72528643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57380f445c571bf8baf5d7aa85493bf54817f00eb2947426119f43c2c548299d. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6L2587934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57380f445c571bf8baf5d7aa85493bf54817f00eb2947426119f43c2c548299d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:54Z), 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/QZK6L2587934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0722303ac0ed3074c814ed2151a2f2c44be92c7f0c9f0c151822c3a6981281d0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTB52545293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfd49ae19bdc1a012f6eba77a6fe5dc977657d1f496da925c1c7a55f786f3cc. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTB52543435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09738851c45a3ba3be5f0a81d17a2a601276eb453b2b4d9ae135098a08df8e4. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTBC2549644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4bd0cf561f9cd81ef76870de6a87b6921c3d9ed7f2910978928a11c49435de0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZTBC2591807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79dcfb18acd5ab7e960b187a16a3e633d35ba257bcc6c26ef85e11483f4fb2d7. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:17:14Z), 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/QZWFS2569765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4666cd24e9da17d961c77bb1e922a7a3eb22eceb1565e6c26798c1b81e7e7fe. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:03:06Z), 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/QZWFV2540205.