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 0xc8346f37b8c1f1a31a5fb39501a93cadb7e0efb00c6c0401a0c331cb37451dbc. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f6beb0f-7718-4b9a-9e02-f6f4ea00e6d2.json and https://artists.proofprofile.net/proofs/artist/6f6beb0f-7718-4b9a-9e02-f6f4ea00e6d2.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 0xf699372a73a237ec37446fd45de3e5a1f47ee2973fd2faf9da171ec0c0eae158. 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/QZTAS2334433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc564dccf74d1f542d10b5485163c6fca17355b1cccca2c730afd6954e77137. 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/QZNWX2455946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebce2cf66f9eddc2207daf8ee9569f0d1dbed5cd7a11205e7f6011e045c4a5b. 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/QZTBA2474955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4120622763a790f289039d7b1752411d1a7554b44436eeb0021321e64355dd. 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/QZWFM2462022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fe77a0b156eb2cd741033ce4e67b5a04ce44b8620399987fc5360cb8a0e921. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZWFM2462023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f34a24af0e7ae0f6f9896701e8d931bf7bf69c1b20a951cd20c55b544020927. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:33:54Z), 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/QZWFM2462024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a59c3530b6bd549e18857adfec5a10628f5574c02547353ebc9cdb38c4afe7a. 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/QZWFM2462025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff9d62df9e4c9d3101d9187b4ec5e539eb9e8d712687952d8473081788128dc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:07Z), 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/QZZ7Q2432147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b0f0b56e6ad554269e1206a616af964f804d7981330767c22e567f12b1aadf. 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/QZDA62595162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2166dfe45129d011486338ebc88d8696b1428615a61879e171e45829770df08c. 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/QZMER2533023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1322b68574c51c1abbebfed4542c3f611d4be49348784ed82375e285bc1fd1e8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZNWW2590367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c729225873f95398e887a53b885032ae279030030ca56ca339eccd6d458afa. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZTAX2521749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa51f3f4b62571b5711c6eb845407bd443d3c678dd532dceed0b611c71656a1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTPX2554755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf573fc8c92df20cbe4a4a49e172fd2e32a98f416e3edcc00536236976c897e24. 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/QZHN62578653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ae7697dd0f3726fca060ae07a29f145cfcab18096c743578b468df48fa11c8. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ772558071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0189396075fae3e47dc787b4eee7ec65ceec13dab1c943b0cc326c918fb7007d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTPX2554756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc5df7ac054fb6f5be8a43e443df3754cfe19722c289797c31d0084de62d31f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTPX2554757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ca03964d2543eac667fd298f51c744ffb1e35a611742be838a25890b29539f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:03:19Z), 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/QZTPX2554758.