thumb|right | Tapas bar and restaurant at Plaza Mayor, Madrid Tapas () are appetisers or snacks in Spanish cuisine. They can be combined to make a full meal and are served cold (such as mixed olives
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 0xfe7e6b43aeb3d4556ab4325b21f5d41e5185e0dd57a7a04912a541153e7a6803. 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/36b8f71a-db10-40a9-9782-374bfd1ed29c.json and https://artists.proofprofile.net/proofs/artist/36b8f71a-db10-40a9-9782-374bfd1ed29c.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 0x4611cdebae31030f85b9add95c9948600d4523965d1bc021702f9be4fa7797a8. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAIR2488722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6bf1a0661af766275f6d97e5fa7aa9b56a123811c3754826bc60e6f1dd7279. 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/TCAIS2488728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e4ec1f3239f9e40a6507521caab527ee4fe08c36eabe93355e39dd7dcdad06. 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/TCAIS2488772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b21bf9d5031c7f7bc887967bdf21f3707c2ce47258390821d178fde3d5efe2d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIW2454299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a01c7d7ee64ba76f10c756d8b167c868ab8080c6cf8cc2fa47a4bb63f67005. 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/TCAIV2427196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706dcd03f2916cf7784a583bc5042ef88de63c5ff87da4ab18fdd5e4e9e21f86. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAIV2427216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c59641f8b9d9c7036f249f1f70aaf77e796b925acb166c8bfe5a235d2c0b71e. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:30:36Z), 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/TCAIU2427255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb62c3fe29a31828cd9c78ddaceb0b2ecde9380ed9dbec52137d2e2e6a21fb73. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAJE2535332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68b127a203580437f205ba534da51b77043ff774b616ed73a6d285f70b43f65. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAJI2550482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0d6425b68450cc29245846a1c15a65c2b5f7c156d91466e12f47ea6f09cb03. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:23:34Z), 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/TCAJI2550501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfadbbb0362121c77abb3ebd90a59fa2d19afd6865ba9e70bd30f18ee5758ed. 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/TCAJI2551439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593f40f268288f3c6b28ba9601f3270ed041a05c3a1f94a3f01993eab8a2615d. 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/TCAJI2551450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363677fe6fe5dc53d3344e4366f2e1d1b6b41467aa72886401e7a906713e2843. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:36:32Z), 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/TCAJI2551459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4f1ba03a46ccc6ff00d4ebe8bbf72545587994ea0ce697209d127dbc9247e7. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/TCAJI2551466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0b9b430226c04c9558793c4f3f816fbc7d824b1ceeb1837b33b079e3727158. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:25:19Z), 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/TCAJO2525569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe525ffdb6059fe6edf524ab1c56bc4a9a5b0cf79fe0a2cb01ae846de2b5d6a97. 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/TCAJO2525421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa499f8ae2ad14965dab4c55c7c2b6024a46ba2672851fee178f9bbeb9b55b4a9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJO2525436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f5780c3adbaf80bfa5e39870f9123e673a41578fae8b821a1d6c1a7c929229. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/TCAJQ2544589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f556c780922e4655b5e2e8b8d541ef0f8e36a755a5af8bf49035a8b2e25ccac. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:40:28Z), 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/TCAJQ2544609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1650015802943b0f45e78aff7231862513cae53c8bd602984d9aa09e32b04cc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/TCAJQ2544633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab46918ac343a9d3fb691631445134ccdb3b1f61e2c04dbc321d14ac91d93de7. 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/TCAJQ2544645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6c843306870bd56a77504a24b81cffd2a165bf292a27a87bfe60adb667d1ce. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAJR2501192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f0fbc1b9a8b62a5a36bf401f9af1b5dc613b7e6f79d7655802cdbfcb6c1cbc5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAJS2501202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd645a0d6ca7ec1b83e10dbf3d301ca474e740196dcbb51b9e0610fb6c871c262. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:35:01Z), 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/TCAJR2501246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b1d90a44dbf004c2aa876cfd00cbfeb6e6d1ba4928f9a73d0b4c806557541f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:10:31Z), 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/TCAJW2509826.