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 0xd7b344b35a515e135452a61f50f4982bd709387437bc3002542c17cac23ac4d1. 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/2192c722-1448-42ce-b2a1-adeeecd5e966.json and https://artists.proofprofile.net/proofs/artist/2192c722-1448-42ce-b2a1-adeeecd5e966.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 0xa01e5772f2a5783f6a0b94f1fdf6166814901bd28a9eade3e27cc038d693e31c. 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/TCAFA2024831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4489794f6b33c699387bfdc2c83b0f2e8c76ab6bcc59f887d2d37fac29c40b28. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAFA2024858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee34ab788016fac359167cc4aeae86999b790c3c4583369708dd8c82c90db70b. 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/TCAFA2024887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e01c933888ba7d5a746680711b2a2d2765727e2e42e9ad9b906fe2c37aff12. 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/TCAFA2024892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae1afcae6abbf4a8a0335c11150f5288016464ca62c926ce5fd8ab22963cf1c. 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/TCAFA2024896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541b4f72cbad344dd9165d498cfee06214b7c4ca4209e335939e76c15b73bab7. 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/TCAFA2024916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff0a8f0afca9820c80c14c8a6bd03bcbf5c7cbaa7b2c032b7cb166c0694a28b. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCAFA2024923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf798e6b37dddbce1a2e049af00e9dbd6416f6b99e352b1524aa72939e74e5a62. 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/TCAFA2024930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ae41d877b3485d2faaf11c76ae3a24111b677b64312b6990c0234975ed298e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ8252035878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85e70d95c4fc81ee865d4e6d0c30b59d7b009a8841eee11034672d35a7688d1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZ8252035889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ad0f7e3621c3bac0d5ce81b9da38be7d57f7d5f246d14e42545005f56fe655. 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/QZ8252035891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036a393dfffe52cd4660f50f8814fec085b49c65a56a052f61788b9880be77e5. Chain 2 (Bitcoin): anchored in block 957688 (2026-07-12T09:52:21Z), 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/QZ8252035893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f2a930986b9713722bbe6a2a4bc4b267f952131370a4d31874d27e988e63ce. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAFH2007893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d1d41c441d060d39c1912139a29eee38ecc04646b69fd4eacfecb8a17de683. 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/TCAFH2007911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87770faac3b5beb32fcdbb11b414709905a8bfd79bcf9dc7aa1fbaa5949265e8. 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/TCAFH2007927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbfe6db062d9f67f02a8f3cc6ee8d9bea81df1d286a737be19a01628bff8821. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/TCAFH2007935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba4123802e28c91c9e28141e9952f0c22363eaaae47161b502e9b925b93e484. 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/USUL10200357.
R.M.M. Ritmo Mundo Musical - Larga Duración
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb273ae33297b3a10bd2abff562e76d4088ccdb480e9170225d3682becb5110c. 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/USUL10200358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ae72a5d2d09c4231fd94beaf85aa3f8c9470527acf2fff7a821a5eeaa28614. 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/COF012222053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278f49ed16a4bf548eb6082463a8c1d8507cb27ba1581361adc0a6f7709c5a9c. 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/QMFME1533500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f699f9c0501c4e2af09e00b30e6e2c2c41a51e858ce27fd3966019e279c3e77. 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/COSO11300032.