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 0x14af575009a0b0e10faa7d7231e5a2425f750e8d196ec271da7be82eed1aeb63. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b8f0cb3-2883-4347-8206-e5e2fa606977.json and https://artists.proofprofile.net/proofs/artist/9b8f0cb3-2883-4347-8206-e5e2fa606977.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 0x8942586bafc7df7e5d3c90b8660d6de73e44205a9bf8b66119aeb99d84ad3da6. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/ARQIW2404109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec39169c697a29755c2bffa935c99d7348ef761a295c186ae961d8b2cdc502d0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/UYM121903722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360b19b0337b9fdd8995833521057fdd4144573d2b0c9b0e9e5884e5b4811d5a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM3DF2160803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba65051953d2fc1e4a0bd0463e077071e2c4b996580ace4ae2d3bbe8f7dc5d99. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM3DF2160969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002f753d79e7e73ab77cf8637505e312e26019cb1f6cd719350e2d40b714506d. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM3DF2160980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ea6b12135e07573cbeb27141200c234549ebeff5f756cf25bafd12e3f036c9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM3DF2163652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3980490714ad2e140b0fc74e5875180e0568bafe3849c244f50576d061eb2c6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QM3DF2194560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3980490714ad2e140b0fc74e5875180e0568bafe3849c244f50576d061eb2c6. 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/QM3DF2194560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ad14b93c2b4bd644c2a9c320ba13cf606dd60d0a69ac8de2b8f3f9d8173af5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ARQIW2201953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b705f150d73bcbde8e236ce043f3a865c8430f2d73648f6da80c138f195ceac. 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/ARQIW2207503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7865d41f6e71f6f7022d844dab16488aece5aa2f834dbc69ec90f0947bec0e8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ARQIW2212128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c20f9f4c0fe6fd34415187f27789e818cd5c2832aba9dc35bb4e1522b42a8d2. 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/ARQIW2213898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c20f9f4c0fe6fd34415187f27789e818cd5c2832aba9dc35bb4e1522b42a8d2. 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/ARQIW2213898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd564130ccab052fd21029d127317f19198387b08abf8c26af5d81e3345a2e1d8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:42:55Z), 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/ARQIW2409636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6607ea5011a666a91df3193a1727ea61693d71665644ce80fdc2c635014ebc83. 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/UYM122004023.