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 0x0b52648841493fa8d2a9a74b1d755fdd557c0b8833f9ac3f2644ba24cf8c4c7f. 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/166e06d2-6596-4026-80bb-042afa33bc1e.json and https://artists.proofprofile.net/proofs/artist/166e06d2-6596-4026-80bb-042afa33bc1e.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 0x87179dbb0feba7e5b8b317450ff9b931f7bacc4d75a7fb2e01db74ff7626c494. 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/MXH412300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf55410faf565d290fc9482f7488de4801f39da2daca7e958db78b759724e239. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USWL12300760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1035fd55866d9b747be4d53dda1c575bf16200712a1427dea13e4bba2ee0d0b8. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/USWL12300763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547b114350e2419525afe0ce9777e83260cbdbd2e032b7eee866df4e3b3795a2. 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/USWL12300766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15181e813768e1fdbfaac6f9abd2e6f7ef4fea91135dc0206e0ea6706cf2eb49. 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/USWL12300769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387701fef3429c088ea14ce6bbf29499a1e75d9d7c25c413b3917af481a3c849. 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/USWL12300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c9b2b08b245f1aa32aeeb9b20480bcf5d6447d99a12000789d32f8d6a64236. 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/USWL12300342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041c452cd9c9fd2bc163c8b21e87e6096b716602bed27935d843da39093fe5f1. 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/USWL12300772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3df12cc6592ac793c26f46454c411e1946e3a1918a8474f224c04b3e6eb7c60f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USWL12300775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6977995e8574a61ae852620625f0bcfac7f2a5c99ec3849e3009fd8f0a42db7f. 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/USWL12300778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec90a730bcf05ac6962c80c03a9cdf5bbc7e43b94236e258c3367e7ab456320. 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/QM6N22463722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cabde64354b41fb436720a1f64182fd420948c83e9b237c5477d089a38a36c. 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/QM6N22463832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b120c1a3e9d163a40dbd009772bcc317ec5cfcb8d4fa774a90d58968b38b8d. 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/QM6N22463898.
Popurrí: Soy De La Calle/ Para Poder Llegar a Ti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed28c4119ab43dc060b12dcd3bb84d008f7e14f10ba91c1f077625da3b1dc16. 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/QM6N22464130.
Popurrí: Cuando Yo Era Un Jovencito/ Pero Yo No La Conozco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a69ae8e8a1d6b5db0fb517311e7e3e2c9fc69bd1c48927ac7742ef0b1d0e57. 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/QM6N22464194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0043cda3318de679a88b1c828a28158a505b02c9b0edc03061de5109a6027b9d. 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/QM6N22464252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4356b23427cbc805d396ed075c3f632a57d202718592df5f1dbd83457b632de1. 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/QM6N22464320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30efc45601d94013e3dbae9a5e0ffcfe5908f1a4896e2f774477d0d0d0ef0a8a. 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/QM6N22464375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231e0f5eb28ada976ec920c84a5242d7fc13a2ad0eb9e056eb72d0f01b2c915d. 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/QM6N22464398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942c027cfab39100aea7d31a426eee551c282816553967178b062d0c2094f98b. 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/QM6N22464411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96451f77bd735b3bbd4193ee96cb0ec7dd75a79cf243955fa371df36139d25d3. 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/QM6N22464463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2ac671898ffd84a952db29c745b7ea0e8d050b698643a5fba54cb2dba44020. 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/QM6N22464479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673fc64b443b371dde2c9aba3bb56d13a2b1e1351626a45bcdec20b4cb7e09eb. 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/QM6N22464491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbacb231b412ee670c8481a4992d38a4b893304be00b88dd01f6382f077e721ce. 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/QM6N22464494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8aaba14f9e58921aed9bae3e9166e1f48fa12f0abc2ee4161c50a67455e989c. 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/QM6N22464557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4141c0790ca53d6da5bac24863c7bfe40f127a9bf21e9bbca1cd6e05ef236b1. 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/QM6N22464558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a021983d2f566cf9669666ce7e3347a47151ea783a3705d0ed2968a65679258. 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/QM6N22464573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a86efaf4c8326fc8cf5fa74a2a1c5d9f8e795bfa311dde0b98ee1bfb7121b13. 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/US3DF2518679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b19ab0c3288ea760e768c04f6a223b3ac88f9a0b6305f59ecad4064ed2bf412. 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/QZTPX2470362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e8840b5a4c23cf9e288dd302f3f1162f733dd2f0374220189787508c425c05. 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/QZNJY2496675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622d8b7492bde6568687611901fc7e8f11111d2ab95d814fe4d149ca2652bbcf. 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/QZMZ92421945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcd1848ef4e62a599dc0110a5cfbb8ff647f0b906e2f858d6e8880d7bad5d45. 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/QZNJZ2345008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0b81e4ee8f47f85d0fff7752926c82bd15fcc6110e2ddefd4642c8238a318b. 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/QZNJW2359133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x466444ffd027cff42e38472ffa4670eaed3cf228ba73f72bd00aa46c2790cf12. 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/QZMZ92308661.
Anoche Estuve Llorando/ Ni Tu Amigo Ni Tu Amante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad0bd0f1205edd7ed75e4786c5fc21e295f191a37eec0a19a16c50b56288101. 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/MXH412300002.
Ni Parientes Somos/ El Dorado/ La Banda del Carro Rojo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90954d5a7afba3678d435871e72d0ada71a4d12fc0d9c2231bd3b56719ba8cc. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZNJW2221606.