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 0x4705d0783e1be06aab97524b79845341c17c3198074c0fd3a44d9c9b83a3359d. 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/4e3afe50-9ed9-4716-b1db-26a27f234b78.json and https://artists.proofprofile.net/proofs/artist/4e3afe50-9ed9-4716-b1db-26a27f234b78.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 0xe825388e1c1c5fc5fed911c003d90f27c1e3f64f9d5cc208589e6278f0b7ee72. 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/MXD782401822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa012beb0e727c5f40b6ed44887d55c1d12fb292c4d1b60079fee8d25584d0e99. 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/FRX202152745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5090bcfe5fff11f7e75f179fa5f8b8e4e865bdd167648e83c44842ac0abc18ae. 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/GX53U2348450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb603d0f6e59e5fcc1d32b9a22ce32b6165a5aa80d1895e219c26a38fa77c0d. 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/UKXN22351770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8252aeb6bfb671c43abb2c17a7dfc5c3eaabf84d43e870dc3a91d6ce90d036. 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/MXC851600052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67833986adab1804bc35918f0e31135221138fec648ecbd81fe783c2ec70cc7. 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/ARA9I2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8e5a194b20d76d213bdae4c151d734ec94698b7f8f28404bdccd337ef82ac6. 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/GBLFP2470663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb603d0f6e59e5fcc1d32b9a22ce32b6165a5aa80d1895e219c26a38fa77c0d. 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/UKXN22351770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf7070d89237cd7d0fff40e1661b923fb82a30a4e46b82b1f9ac5a70a91f021. 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/UKXN22281209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3995e4f23215e19430ec15e856576bd89cd2a292ceaaae80090b6210148f5a8. 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/FR10S2007573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae325105601ecd6fc7359176de353a1c8dd7f435a0438fabefa487be57fd49fa. 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/TCAFY2136049.
David de la Luz (En vivo desde El Sofá) [en Vivo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214a1dca5669c3fae551409c5a4042b0bfa7c630959d28adaa2556bbd80422be. 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/QZMER2044886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a4c4c306389727b2a4e0c52db954919808efd09abe965ddf7169d23f0181e5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRX282015048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146d42f199db2547942426f20f867aff2265525013fa51a12c10af0b34525580. 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/FR59R2042762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd582c157cb7014aa353d3a083258d2d545364f490864c2c4760441482d9a5c59. 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/FRX452099280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77530cd550af535fa7ea4d563515c33610eb978195a15fecaa383928ee6ee975. 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/SE6I31997165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663e598355a024e64721abd22d485e193241ee9d6de92b523b78d4996ec0bce3. 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/SE6HN1987303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1d7d552f425e7412dbf0b3b9de108639d5df532a2ef5474944b7d4b06ead1f. 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/SE6A91975814.