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 0xa164751947a301c5faca569bde2bbbb55ee800eed270474129844208abc21038. 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/e5aaef31-a34c-4c15-813d-7665357cf8ed.json and https://artists.proofprofile.net/proofs/artist/e5aaef31-a34c-4c15-813d-7665357cf8ed.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 0x7844a026c4cf92cdd6b61294e18926b3a7467d97d9ac14943c9282324ee19db8. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ES18B2003351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf667b5f2004d2d3ed67177f47c607daf5a3efc5f7723fc95387ea6b6cba2a1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES18B2003352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe229f81f926886345a8fec962e2a81f072b39485d713698e2921e472bce0c17c. 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/ES18B2003353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23705bf5203971d85326c1340fa9a77e27c6fe5b8b507776b75cafde87505534. 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/ES18B2003354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdcb4609dc384846dfb19d09995dfdbfbb7e784c97d48f3b2d99671652f971f. 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/ES18B2003355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf598f79010bd2526781e668d6062cf6f2cc263a1010102c48ab0d9f8cf67b4. 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/ES18B2003356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9dfcc4560157818d1d1a511b472ab013454ea6bb236edab979d33eb9e94ac2. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ES18B2003357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b9372ae7c902cfdcb51684e813fa3a87330cd2e88cfc95d1d848478d6106d1. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/ES18B2003358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a463823564acbf3d650ba7cbaafeaaaa150fb3d9987f85679a4b7d98f6a524. 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/ES18B2003359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b630d4621af4e37711673c50ed2e1abdd71fe5e3629c8af79bddb1c450a5ad1. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/ES18B2003360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b746c24f7371424acaeea93d59a2d28ea19f3c9165a8e1ab081c15b717c0eda. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES18B2003361.
El Tiempo El Tiempo (8:36 pm del 27/09/98)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b261577463ec3a1caa6806ef737230625ab7eff0a68bc5eff808acb3bb6775. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ES18B2003362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c650e9963ac57fb38fde1d41f642d4bd211a21ae4c007c4f3faa144f583d940. 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/ES18B2003363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1220899b90f4f8bb9c715c82681bbff714a8dcac9eca7e49afb055dcbd07b90f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/ES18B2003364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb6a26d463f8718b007e053de354ca1721cd22f3f90ab68a87fe2e0ce72c882. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/ES18B2003365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1070261d23b81f8835a6c374890a3752aeca33a9a671ea29be6bba08e03237b6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES18B2003366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89acb5e1e4cd921004a4215946fc436399d3ce5afd86b1e899f7edadb228e6f6. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ES18B2003367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf0cf9627c610db945d5d611f504c48df5e554197635973d1e9118f22cbc12a. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/ES18B2003368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c8f6747780fbeaecdf5827de3c4d0826b47a4c624b85c922287022829606794. 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/ES18B2003369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167418b3de3e164067c61a883dc59c05f66ffedc03df92f312bfdfc43dcf7395. 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/ES18B2003370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6ca22d74fb165392c1dea9fed61173ba7354055d1874904b0214e7a3805fa1. 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/USHM92183787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f078c0746a43a0ff4a847023cc71f35de05ebbb9d59c94be44351052034047c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USHM92183791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27795c205b986bc2a6e04feea48cae0af1ad24f53aad942da58352e0ead586c. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/USHM92183796.