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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c296a0acc9df165ee478b81ef52c1ce015a1e34ff73d2b99d0f4e2e092f4345. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4caa8a5-4f29-4e54-9602-8cdc19c4b416.json and https://artists.proofprofile.net/proofs/artist/c4caa8a5-4f29-4e54-9602-8cdc19c4b416.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d89e91ef34a6a62d91ce4b5d7240b9805f070b53c5337e2d5e3e0543d663a5c. 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/QM6N22077187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808c9a3b392712c2fb9b9a5e3496bc0d1f7cab625d5727340991682a3119c371. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QM6N22077186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d89e91ef34a6a62d91ce4b5d7240b9805f070b53c5337e2d5e3e0543d663a5c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM6N22077187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808c9a3b392712c2fb9b9a5e3496bc0d1f7cab625d5727340991682a3119c371. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QM6N22077186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2c51b9ed62e9d8921ccf431eeee6de34285206eb37f3dfeae1060e8c15b192. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:20:46Z), 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/QM6N22077188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b53d8873e15b1dfe82c0d4aa374634eed341b50b6349cb1741e5d427985927. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6P42000934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616dae137c6acb736344dedafc9550b735a8787e79852da40d05f3482a178eaa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6P42000928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02855061aa319fd6a2b62dff0158e8c43bd9926b9f710b5eec9f6b3d65cb9566. 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/QM6P42000930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cc7103a324bd04dc9d031223c1817d7af8679282ba22f7ea0a56d7883e52a3. 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/QM6P42000933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b53d8873e15b1dfe82c0d4aa374634eed341b50b6349cb1741e5d427985927. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:08:53Z), 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/QM6P42000934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efc93b10d0f77a7c0a4aa562c4ade396a6e1a0fd9c38058a01cac6da4a64e01. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QM6P42000940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fccd81c5b039d0cc795a9d30231939ae48e4397159923560c8987f3fc63858. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM6P42000941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9cf5cacd27014d28c9bb59463b3b700c07976f82d5c10c6b6f6614c1259a63. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QM6P42000942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d46b74f48cf031664ffd2dc0758e54aa5f44a0a509740dda0d3dc230d5b4cf. 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/QM6MZ2104788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d46b74f48cf031664ffd2dc0758e54aa5f44a0a509740dda0d3dc230d5b4cf. 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/QM6MZ2104788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96151f12a1dd1f48708e7d0d54753b6843430e80251fc6948d32ed66e838afd8. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/NLRD52235743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96151f12a1dd1f48708e7d0d54753b6843430e80251fc6948d32ed66e838afd8. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:33Z), 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/NLRD52235743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c4e4a6fb41b1591612f05583c02b3d701853cef1aad70efe871dc07d7c87e6. 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/NLRD52320179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe987606795ff023de9e6260da179081f8782819b16f1cd414fea93efd9079c. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/NLRD52320177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d3fb04cec4a94fccd3a60a9a73d5d1f1ceff2fc9bf67326c7001ead5d883af. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/NL8RL2430914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab3d04c49c3ab77fb75a0adb7e098a565e2c33a921d99ed7e063ce304b161f5. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NL8RL2444495.
El Patopecuario (Los Clásicos De La Parranda)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1ddabf8549decd0905f81d6bec2c111d6f5b45e27d8763939ebce03904b2a4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ22B1748081.