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 0x74ba3d20397642a17d0fecab8c12048a8370584e2be348738c7003370fc57a8b. 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/f5de56a0-3fb5-4320-b788-189a421d176b.json and https://artists.proofprofile.net/proofs/artist/f5de56a0-3fb5-4320-b788-189a421d176b.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 0xf30f3fc7b49214b6a85a6c730d6973f59da10e98bf64a8c3fe9a89900ac83b27. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6G2061835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef5f7f5b413fbbfe5965b642dcdaa63c813f9ec8c10864247f57535c83e8339. 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/QZK6F2008608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd577f89bef428ef9b559b9d303bf3684340e2ffa459646df3f4e5d0711e1977. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZK6F2008617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8939c2099a45be0341ae19b047fa86a9772e6e72abe1379e1207c3b0b11535. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZK6F2008618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cb0f82f56cfd1d2fff5972c72dec65cdf9c2cba95072c59f4ffdcc4733a8be. 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/QZNWQ2081092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72fc790e00f675862e67c7a21fbcdb5fd6782a41629177e4669777a8e4e7886. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWV2166276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9701e11c1d593640ed6c1571b32269e2be510e206f775fec788387b86ab5d188. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTAX2247033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7cb82d499ab45d8f7323f3deb239345e6f9abaa783a706d0b77f2dc28bc4c7a. 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/QZDA42386083.
Poema Sinfónico a la Semana Santa de Málaga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4b518079f90dfdf2699d66882e5574f70534a0a05d336cafd9c03a78474284. 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/QZDA82359808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14adcdbed48b82b9c7cf9926a31afb633ffe90f5e8423de3dbe38ec2db7b415. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZHN52340384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8950c01e66c26122ac0b4a14be390097c03cdd9dc3171026b1be6945cf87c97b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHN52340391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a53ad7e39cc75a3d910cf3b3950a8932b2e3b9d8967287c7f211674d9f1590. 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/QZHN52340392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05501a2118579c6c550c3d33615e7afd6e0d1c3e3f6e0929434a5434dc560943. 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/QZDA72433572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd11fe65d9fcdaca4687a1e58ee2dc06d47ec280b35bd85bc896bf5e1d75df1ac. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN32496633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b6ec05c4f2493d86274d611bbc238b0e6c7b7d9c114c44307975bb57ad16fc. 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/QZNWX2441414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1482670fb8d34c3bf7f157c3f17114f309a5a9b5484ab8eab2cd2a935df36c13. 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/QZES92534363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ba757c51c394b0051fd9f2a5b1a2aacf42b630536d0a74a332069fe647dfa3. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZHNB2570283.
Himno de Coronación de la Virgen de la Esperanza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c882d90ec45137bee97fac9a16e31a235e6ffdedbe156818fdff7cce3fc72d5. 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/QZHNC2568125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde883963d3b559d355bd74ed34af330603042ec798d4d91244788054125bc4ae. 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/QT3FC2591371.