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 0x180a16421903c4b65e0a244defd6558376caf69b0cba850ba0ac717812a1901d. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6e6f290-a7e3-42e1-a3c5-2179f94b55fd.json and https://artists.proofprofile.net/proofs/artist/d6e6f290-a7e3-42e1-a3c5-2179f94b55fd.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 0xd7bae13ff5dd666afb277d1e2dc18020bd93106aa1cfb58d408c0d20673d78c1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GXF9Q2507821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1abb5bf61fa79d47aaf97a43e6d91faea4350cfe5cfbcb3e18e1580e794d5a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXF9Q2507822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261bee7f63aa910f72b878b932653d30fe27c574cb37b83d80b50c78fddfaebd. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GXF9Q2507819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e800bfe1b7d5088e3f79b49b34d896a972648340a0b5addef8e6b434b01280. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/GXF9Q2507820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f76535bdc02995c07daa8d8eeda7730914051204ac9d5d63378317aec61cf71. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GXF9Q2516527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968ebb12e27a85ea398ba3c02d3810ed8072bc855616f941dbc60a5d4b9ad7f4. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/GXF9Q2516504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2166a66b0e625391b879d0cbd736b432cda6303dd015c27b1da61f976362496c. 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/GXF9Q2530675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bbe413ca7c2b1fd78081a9c7d4757b689b847c102edb18b167f5ca880c32f8. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:07:10Z), 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/GXF9Q2530676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c4c0b37dc5bc3043f8fe846dab0f8bc18857f5e12d85a45036fbe7e0ed426f. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T16:59:19Z), 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/GXF9Q2540266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51993dacd5ef9a596732dda09ab09a0d3d7de10dd742902e4893f16bd0c2856e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GXF9Q2557467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81cc1320db32a00d06f22935def3dcc769b4bf8e040ee04bcede4c40a3c1694f. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/GXF9Q2557464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b1d9819bea121b65fa1fe00d10b3983c21ccb483c78a1a0a8b3a651127dac4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/MXA3V2420583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3441e21559bf7b8035d3d465579ba55a3ef77e641ad7a52702acceec25414bcc. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/MXA3V2420580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaee1243ab53dc6962a45604afab580d20751f055249aa25bea5cd51dd6e2f9. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/MXA3V2420582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7907d76dc2cb1d5f598d42b583b0603d7c0d00dd71082cdc69d17a9bbd8fd54. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:34:35Z), 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/MXA3V2420576.