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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8857b4e84c0c57f783b978f4f5e7a831afc4d72c02b84c42d5db2ee3691a94a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/722f6e73-28e4-4fa3-aaa2-d5d1fd1933e8.json and https://artists.proofprofile.net/proofs/artist/722f6e73-28e4-4fa3-aaa2-d5d1fd1933e8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd015ded9d57616b0f6fd00a826529238cd83bdc08385ad7e77e50d675a5ac0ab. 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/ES5531224849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14edecfa3b5abcca743d30ec3b6e16a996057cd6700c9a5f04df33345499a0ff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5531224447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f708c9843b88b2671a045df2d33dd33d2ee662affa050ff4bba93c0bd79b3c. 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/ES5530500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007db630a937ace138dc6f634452cd55926a2770b4a18f09ad5dcec52850f200. 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/ES5530500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1acf9daff09864d7ff7cf487fb67b052f440b8be36e30039277e050a887849f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5530911123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b3d9bf1563984f1d74d40cd876f39112813bc7ced2b6b3989f0b09886672cf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES5530500174.
Música Ambiental Guitarra Española en Pop (Volumen 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840d3d12cdd4032c88373314fb933072d5fe7c43236bd22f4a009aa294a58ad1. 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/ES5530701181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497ce6dee218c6abef7480c6fb846d3b3c36e28438762b11030f27c7e74cd7dd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5530701176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68009a96ae34f0ca8b69895d2e62a286f3473e49f965b4540bd516dad0ecce7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5530500199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33edc4d655affdbefec10d1c5ed56dec4d675b27247c321f304b6b5dc0d11df5. 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/ES5530500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86f818b371dbd7007ece9b0d72fa3d3b67fa60615f9f9e83e9dfaac0498e85d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5531224867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5aba428b9aef839b727a89717857854ea225ec4651b5584ff613e8d8b2517fb. 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/ES5530701162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093a718609b3c9602c0680d6e888870bc397333c21313b96a6490537065291aa. 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/ES5530701166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f85d176091758f0d6a77e2a5f92dd278dcdd905ad2886b7f1e5b5a8cd8a7d7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5530500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ecc3931df4a324ba031d06d2b249732e9770b67e323709263ee27d50e7e03f. 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/ES5531010977.
Música Ambiental Guitarra Española en Pop (Volumen 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf9f26581f281c58903e02265138db213ef46bf7136aebfe2ac89af7ba56348. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5530500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b3d9bf1563984f1d74d40cd876f39112813bc7ced2b6b3989f0b09886672cf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES5530500174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14edecfa3b5abcca743d30ec3b6e16a996057cd6700c9a5f04df33345499a0ff. 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/ES5531224447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd015ded9d57616b0f6fd00a826529238cd83bdc08385ad7e77e50d675a5ac0ab. 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/ES5531224849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c31adaecc8f1786db35d7fdc761e2ef32e945b0e6df28193a623607e4508b0. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/ES5530500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e474ae3987edc31a9e84a46351f7dbb7aa9e360401fcbe11dde3d4c7447f7f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES5530500169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1acf9daff09864d7ff7cf487fb67b052f440b8be36e30039277e050a887849f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES5530911123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede3d31d11c38112f4bc3f0ed33bd394ec6bbfd22f2dad6fd2475d197778ee89. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5530500175.
Internationale Pop-Hits: Spanische Gitarre
Guitarra Española - El Mejor Pop Internacional
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f21dae5a7df08c65ec7b67303dadbd882be7beca6229f2f03e6959cbead6e00. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5531224443.
Spanische Gitarre - Der beste internationale Pop
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f716bc58e40afd8ce279791c1949667f29ca4358ac1a39c4b4e067a5e82dd67. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES8480700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30d2945ebb6989a928fff581ef6b4ade8bed44dcae92b8fc5382d9413c929d4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES8480800363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c90b2c1095f2b2b80bd9cd7a82f923ee6df933481d0e817e5a30dfc1ca0015. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES8481300985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c2e01ded6ed2554b17250207a64d7bdca083ec2180732ddc52372eefef94528. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES8481000803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154e51731ea35d5f6b04d6a5429f1337affb6f9d6b0852716fd6acb59255000e. 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/ES8481300986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf58f7fe2cf99bd7d8f9b06cdca2b6f97ad4a230312e14703b3670315d3a748. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5531013601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc538d0bf5a948c87084cfa5ff53602581304569fa9540d19353b0d7613a9d3. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/ES5530500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98fb3d369699d01fe9991e0ba4ae2f6b9f47998678abfc370a52c212aa41761. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES5530500153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ce0c6fc13e2055c766fc8ea96cebd5f6b1833749d9d2040f24e9657f1669ff. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES5530500251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212c877e2559f271bf12b7c14ab80cae16d3aa14389c51388c130ad8763c6c08. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES5530701180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac1b20c721ed7e2a5ea328d44b9dd3b62e3917ca81140d7ec9bc2efe035c8644. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMFMG1327301.