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 0xbf70aae366310e0a51e2e606e15eaff1aace4eeed2f2ff267190367b7a9a2fa6. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/665282ec-8b87-4c1a-8360-210ed0e2f090.json and https://artists.proofprofile.net/proofs/artist/665282ec-8b87-4c1a-8360-210ed0e2f090.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 0x953ee3695ea431ccae461edda90b41d6938bd1fa0b6f79dff37388a0d1310d64. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7M2412622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6662ea59ed0f14550ed999fa7512331b1143eca7bacbcc2e0d6ed302e9220b6. 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/QZZ7M2412627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c897058a4a18ba740bded871a69783bad1b4794d83ca2f54b3d47da4a3565c. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:46:16Z), 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/QZZ7M2466137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38da8d3a380ab3305884a071cd3d030c079dc9835a9435a288fc9146c8014a0a. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:32:43Z), 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/QZZ7M2466140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df8bdd25df199f680575515704051408ebb81e30d50b0d24a46c2c2f3af10fd. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZZ7M2466141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20904e18c3d7d755ade3e180bde029daeeb6e228e2d0c1febf0002fc38c35257. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:32:16Z), 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/QZZ7M2466142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c47b84154c927f113fc83b2af548c0c6950cae31d6453777e981932b6b45fe. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:38:42Z), 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/QZZ7M2466144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a280e93d18faa90c97ce829877a481b83f53389eb50836e48086086fa4c025. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:29:14Z), 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/QZZ7M2466145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8bd8ab1101943497aa375709f43318e184b42ec94259a3da9001f018be5e17. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZZ7M2466146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773f4e2b2ec4780708f49f2380e44902f311314d20f076eae14a910bbe8600b4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:18Z), 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/QZZ7M2466147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1d4b2cefc1a2fb788b1bb0c13aacd453e2e871669116a494063368f24e40fb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:11Z), 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/QZZ7M2466148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd67121344fb03d5c6628eba45c1ecdc51156e27bd9919251135cba784daf7be. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GBLFP2542994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d34d89e0f15b064160e1c45e4aa491ac877895c622b3ffaac0c39e26f14e920. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:10:47Z), 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/GBLFP2542995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbc4c7cf1f3e1a70cd17af667af7f96490356c248defd08223c97f691d07e86. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:27:35Z), 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/GBLFP2542996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f8251b064457e445c5915fe2f1bfbe08a830d08100b5f61cabc501f6850a45. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:00:47Z), 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/GBLFP2542997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee7a00c492a48271b1dbe9ce2486ba969a9d7bff5f21dfc95fefedbaf5496034. 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/GBLFP2542998.