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 0x1ba3124779a2a465f5e29af41fc074b63714c0469abb25cd2c995063b6044b9e. 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/b07377fe-5c7f-4f7a-915f-f275300a401a.json and https://artists.proofprofile.net/proofs/artist/b07377fe-5c7f-4f7a-915f-f275300a401a.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 0x9b8e7dbe4c1175906a8b146db7f9100a125d3a280e4b87b2d5266160b3e01ac6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/US7VG1680523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5332e6133e1ffc60fd80042dbe4d1188fd04a1c0a842b397e3614cdfa56bd724. 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/US7VG1680526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee3d7298f5e5c245e976e264412196604bbc2a6bdc58de58d3e4435daa968f2. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZ5AB1617946.
La Fortuna de Tenerte (Sesiones Acústicas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c12b30ac0d9c1e2de15b5f82be20f3520cf3b43c3a5863040f7cd21ec54bbd. 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/QZ5AB1870581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8535603521d10e4ea7601135fc14a87a934d98cfb0e88becc7a75ee0a1b1474. 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/QZHZ51947064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ad74b0bc2111b847a095c68207335ee5dd30f42c6998287a27bce01f2c5673. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJV2046695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c12b30ac0d9c1e2de15b5f82be20f3520cf3b43c3a5863040f7cd21ec54bbd. 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/QZ5AB1870581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6389f0377cd10411c6041355f61d2a0344b6e059e1e9bb03be20edba85927fee. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US7VG1963238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70a4b3a1dc869934d4ed1b378b6c4c7aa8e757707cb084e98285c6f971497ee. 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/US7VG1829242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623b69b75efccf986dacf94c9e9c3f39946d443528714ee54d4b4f3be2506638. 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/QZHZ31962932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53eaff89953cd0813cd148c49f72c8298dbed7d26866428a324aef5a905839c6. 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/QZNJV2046696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac3a93c62f112e51f872d709f2bd1083225650bff8f1a21a8b5f73f5a086258. 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/QZGLM2149030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884c30c29c880c5c2cec27fdd08898f884f49aa6e9f83530bd293c7cc7d94ce3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZNJY2197118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10509f820ee786cc6c84def9f0d2f07a7b40b89fad978fa5d60824f68b9fdd3. 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/QZNJY2312169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c53dd3a20fc24b264e7ad6198eecd2b849b7835acce69bc6f429ac1051a65ec. 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/QZTPX2321589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb937970086bdec3bea0cc98a7fdac62573cc9f785f235d71e209a816256926d9. 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/QZ5AB2447536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6b774a754d37a0c865b301016fbe83b3d95252e89c3f2b4119fea24954d691. 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/QZNJX2494614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10509f820ee786cc6c84def9f0d2f07a7b40b89fad978fa5d60824f68b9fdd3. 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/QZNJY2312169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c53dd3a20fc24b264e7ad6198eecd2b849b7835acce69bc6f429ac1051a65ec. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZTPX2321589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a106c8dbd48c83e773b2a49a6e564c371972cefc427aadedf0166b15edcb14. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZW9K2436199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224fd69485dbd4a8b4df83fbc28afcb6350be3556475e2b808bd0e87c69cf780. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZW9K2436200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2053070b7f5191eb95df29654bb30805814d03ba72ad270cafaf8795e6ed4c21. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ52085270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd202ce89af176a4da79aa8aea28dfa5ee6ad41507f977b8e4b7a6a165074f4a6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:03:01Z), 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/QZHZ41993756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7538e74f7638f1f1dff74f1eff7a7f3c14caf7ecff0ff2b7795ac378a17cb0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9K2297790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38076e1b3ed9fb770d016198936cf3c4b59dcd5f0a566ce96b0eb661228a50f6. 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/QZNJV2042210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef567bff19a281b7f04a81e35009662ed74c0dec1dfefdec4ed80b23629da4e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZHZ51905478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb23f887cb0ec31b8af59be9900c9ebdf4e34739f95441a2c380456edf6e889b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB1932911.