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 0x88a4c50b01e5f4c4f0ba8611ae40cdd0c3a657626814be6fbc9e682a62d25dc6. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/602413d0-c228-4520-a3ae-4f302d4b6a8e.json and https://artists.proofprofile.net/proofs/artist/602413d0-c228-4520-a3ae-4f302d4b6a8e.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 0x3e86cd221e8c87575d68cbd24fd90ff94abf40d5a1b8af1528acfc00dc0e1278. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKC0B2300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48ca2d5d3022ef9a7be61c8beebb366a9ecf6a99e7172ba00f69338b0262c52. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKC0B2300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f52c71008a7471424e7136d1154d9003c1e42b8797fb4d7051f6355885bf87. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DKC0B2300308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b2b7f6a7a9b9b369a374115fc092596fd752c9d2aad16973902d87d1986bef. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DKC0B2300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f642aa8c66ecd1862de5d4b226d9455fa3ff7b8806d3351e8acff3564bc5bf9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USCGJ1913003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d991fc21cba2e4e2fa9c0acaa0101a30142deb6f36e99a4cc453e267d6a5e03. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ1913004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f73bae795be23bcd5446ebd138385dd9420a512260264f1ede7b6757937cf5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ1913006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d1e7b9dcc0fc7b0d7fd011d97f8c7fe3639bb85fae694c40a4107ca81d9b63. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USKUT1205602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb6bf5b904dea7cb72ff6708bdc6cec560951bd972fd5af50d744c73d853568. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USKUT1205604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6171b145f24900a3d9efb67fbbee51c8be7f891246045f639f294bf9ab161f8d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USKUT1205605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05694aa7a4aef76b0de5d675ff1db6b6cbce09b8ecb2cfc5db4e272a2d841a5c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USKUT1205606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040a9dde917bf97b62de4af619b13cd6c1b2a4afc7381c8d9e6f7090f30757c2. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USKUT0902104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca12e1d58a48bbc25cbca6d1cf05539c9e116f4c8f6d2d54ced8c71620bfaef1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USKUT0902106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cb0c39c028bf1a51689152915d1bfd7c6544243f5271ae79fa2fade7895a68. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USKUT0902107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e86cd221e8c87575d68cbd24fd90ff94abf40d5a1b8af1528acfc00dc0e1278. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DKC0B2300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393ab661631fae742a319f109bd3dda612cd294720b1e55782194e56cfad27b6. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/USHM91711323.