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 0xd5bcf557e4ac4a2812ddf1f7d79a1a5d0f51104702a11cd839531a51ba6d3068. 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/fc3f1448-4e2b-4f38-82b4-fcb0ecceeea9.json and https://artists.proofprofile.net/proofs/artist/fc3f1448-4e2b-4f38-82b4-fcb0ecceeea9.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 0x348a404a82823655b7fb4701424ca012717ef14bfbb30e47c2136154f1273005. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/NLGM12164189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4478912963d24faed5c5889fe808985d4b8d5214cfbfe00ea39f4a68f69225. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/NLGM12164191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e0142d74a68dd296bc1f9160126ed4d0775cb2da40c4f72c4488b52eb047c0. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/NLGM12164194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680a1f4b5645fc944e267ff0fce1b8839b197901e6d76604ef425f5cbcd6c82e. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/NL6VJ2201797.
Testa, spalle ginocchia piedi - Carillon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379976a05353fb4d87692e99454ac3e4de65b4396de14012559823875e44c556. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/NL6VJ2201803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c31e5d796330d6232e924019a31d3ed24f11102188599062f4d7eec4ede2c2. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/NL6VJ2201809.
Ninne nanne tranquille per i più piccini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf287fa8277887615dc56ad72170c8a94ebcd814ed47f2d62c5c2ae675c621293. 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/NL6VJ2201811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8f073e7960174568da1807766a7cc5d8d271c2e74622b29f0b65edbbb2e0bb. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/NL6VJ2201812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1cc0101cfd55b73df94f874b9477e1c09f6eb9094ce3c1f5784f50c2909869. 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/NL6VJ2201816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45d22945cb8fba757cf62ccfa1fea428ca1c44b310fb3c442888e0911c5d204. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/NL6VJ2201818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32986af9228f720d62218c74d4157b49b15d7a1c013cb15d96e50ebba4f5b400. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NL6VJ2201825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd8d4e476f1f27486b25b978e33d050974ba3a3631d5afce385d48918699e74. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/NL6VJ2201830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c11a71e80bae0e598ca935f5cf36f515881a95d1768858f631203cfe842fab. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/NL6VJ2201832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776dc9c94f09394aaf96c1bbdef055ef81eb0f23494af579458db4123c7895b5. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/NL6VJ2201833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1755a8e744cc940646dbcfe228d37e9b46a18cea6f15b3dbdfcff3bac996e5b8. 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/NL6VJ2201834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0f2883ebfe1143a50be0adff9bbba31ea98f0b9e04a69d09e4a56d954da797. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:44:04Z), 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/NL6VJ2201841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa973b1bc9c4c79ec956a8acbe4bdeb7e065312bc0442d71a0e8ff7d6ba6d0d79. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/NL6VJ2201844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe660c4b696185ea143ba5bac069da6b1cc02cd7de49b54bf989f5c2c37fe9318. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/NL6VJ2201847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e7c79a2f0fd61c942299f40a161634afe8d92057f7f16b9f0a54e9af024787. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/NL6VJ2201885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff5de7eb5796b1cbc5d2cf21a768648e2d5bc65ae69fd5657cb132fdd8ced58. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:46:44Z), 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/NL6VJ2201888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38162eb14821206e1ed8aa6f03dbe38ae5d731c7edb956eace9fe449a75497a1. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/NL6VJ2310878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329a5d4a9d263d0f2d54ca0d177b9bb1119decd280f427552638dee002d644c8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:53:16Z), 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/NL6VJ2310879.
Musica per il sonno dei tuoi animali domestici - Ninnananne Per Bambini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752eea605a1242ccd930760b778bdc25b6ca39c047cca5469fd1dfe6d8c96454. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NL6VJ2310881.
Un pisolino ristoratore - Ninnananne Per Bambini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98d8570511f41dae1be176652a3488376f4a498eb5565d7719ae74354599e651. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NL6VJ2310884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f657689c49fef06c05a08b4b7c04244358f1efff468aede9d5c145b62e5e1b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:27:49Z), 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/NL6VJ2310885.
Le onde del sonno - Ninnananne Per Bambini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297123569485c129e173bdb7f748b131d6a4f3936383180ffa2c773d025fc7f8. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:46:42Z), 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/NL6VJ2310886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e07abd395882414ff6c3f500c907adcdee998dd51ab672dd4aa8ae30e2f7ba. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/NL6VJ2416271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc6ac5a42c0577b0f86fdc8bb5a12464bd19f12d8132d1bf9ed6164dff6a8c1. 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/NL6VJ2432834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d5f6b4091c4cc8091a1f4d0ad8bb889929807deb6a1c970ee7b91de5be6fb6. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:25:26Z), 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/NL6VJ2432840.