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 0x3fbe5016b60cedeaac60f5782a24bc2d878a6f9d7ef9a2f0b0b93c7c01925a66. 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/efa551c5-ca2b-4779-817a-47d4d7955220.json and https://artists.proofprofile.net/proofs/artist/efa551c5-ca2b-4779-817a-47d4d7955220.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 0xfe1d561b748ddc5445ae0abf00095b7283c2179358102f397a78baecce187d97. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCADS1801724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc3233bf9fe8ece1d36c866040f2cd0f4ab5c07ab6ab9350e766b6fdb5b15fe. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCADR1898683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aede825d6440efb4dc6d8a1d2c62aef4d64635811d934374b42df37e6a02c6. 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/TCADR1898688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176ecea52c5df9109a19863c967fade89e3430cfa601f754fd78ee96348f4918. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:14:43Z), 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/HUA611901732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37df4b540c3c8bcdecf581749cb17f86196431091e9be7526f3b6913a4b2ac2a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/HUA611901735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330c2bc400e8d167711c1f23ec434a9ff4472fc4f219f8f5e71e5c7888254e83. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:54:35Z), 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/HUA611901739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4841d73a74ab6a4a83142bfb786c62c40d4437f65b395fd8762e07a46853d6a4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/HUA611901740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa163ed7337ea66d7bc0d0dfcbf9fc7bc5ecf577d866a86e509268611ec901425. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/HUA611901741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22483fc2147c47973dc7b0362fb9216f335fec38f226f9332fcb3896d5617ee. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/TCAFC2094402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3b00970135f15f14eee21941547710a86df53dce0c09e68daa6e8d4f0ac1da. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:59:04Z), 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/HUA612022688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb791eee4bea4a3062df1fb26a35b2bdaf9ee0323909c4252b222e33a4a7bacc. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/HUA612022681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e9ddf01273485b14afddadc1a1365bbf2e79502e21b1cdb2654b3f41dfc5e9f. 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/HUA612022682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739899ef93b9ba75e7990f89d9fa0370a59ec46f523ae5427368ff4d3f574e2b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/HUA612022683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c8e02695f0489fcd0db67bf4baaef89b0d01827f1be1d2c2a6dee5c0eb91a9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:01:29Z), 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/HUA612022685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4faa8768fc5a9355b6d065ff67cdaa79271a32867e2412ccea7fd520dad7a19f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/HUA612102604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c2610a6fab316d65f07c2fb520c9dbad40865a0cea285724f8560ce889bac2. 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/HUA612201726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc384e488d498e62f3b9c7713bf619789f9295a2205bec3333b8c4afa71b8442. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/HUA612401355.