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 0x43dd669d04a0917ac08c17a6a3b3bd0fbfe3e4c567177e9c1f424ee9ccb159b8. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e34a5301-ed4d-4054-b487-7a4b36a4f6ab.json and https://artists.proofprofile.net/proofs/artist/e34a5301-ed4d-4054-b487-7a4b36a4f6ab.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 0x487b72b2347c4cfbdb4568b71330be6ca30711ae46ffca7cf4dd90cffd8e14fb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAIU2432545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2a049af0c631f3d4b46edef03e93d6130c9cca918f10eb190661de5780af27. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIR2422312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8337297830396e332a2d526f019849c566ed139bf1c3a5ece0763398f408883. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAIJ2419384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a27390691a9fd26c113999a761299c52e94c5358b002f07aa125be41ce49d1. 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/TCAIG2437966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc688cd174ee8576cfaf2aa79fdd59aa8d5e520b71862a03d5fe47690b9eb04b2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCAIH2437863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7690224d7ceea20951dde84cb28c015650bf936394b48659d5832d77b35c986. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/TCAHT2499364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0883d36bb448907bce7181e3b216f6fbba3898791bc26189b0defe34d70bd5c9. 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/TCAHR2325508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2acc924d939cc1b1c2e06c5caf7b5a848909ec434b7f489d6d45d2b54626b68. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:05:34Z), 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/TCAHR2325528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9779a7d5dbdb67d9082e7fa9115d1f967ccf75b871b906027be30a52e7d39902. 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/CH6542373079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ff9b277759d17acc1ee119838e8a233343e4ca7db21ba7c465699383b1bfc7. 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/CH6542373080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872168883c62983b199a41609e6aa57bc49ea8925aa1fdf29818d5573c7e77cf. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CH6542373077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f48eb403f552ede1d6364ff0d1d2b0a5ec6f234215d31077d9d9aa5459f627. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/CH6542373078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe568254ebee2e3031a8f321d610f71d7f0977cf0bd94744f461a55e13dbac3d0. 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/TCAGX2361239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfa74ecf9f88d35fd9a3e99e76752860cdd5fd7a0c5209b128117744efc3169. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAGR2237707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46d8572b137a7c3169759c1528a3d128420c7a9b06212749aaf36fbe7cf7ef8. 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/CH6542265713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e0af09e4e8c4cc7a9e589c7a4d65865b365ebade67d030b37646f542725fdd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CH6542243530.