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 0x2da4f3fb8e0b351a83edae4e98f78e730bbb1c8276385c95b79d87557334a94a. 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/387e95c2-b7b4-4370-864b-b9835834c5c2.json and https://artists.proofprofile.net/proofs/artist/387e95c2-b7b4-4370-864b-b9835834c5c2.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 0xe9c9c47faf0cf4e643fb9f54669a8eeb2392ac1d16c8cb1436db9931e38dbe82. 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/QZWV32435227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032257df0cd364f02fdb7892027a843c94521d5b920fa3bebb66db9769d097a0. 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/BCDST2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee1c9c9a686410118a40861115180396103e8e322032679a91f27709b3a267f. 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/QZZ8A2488481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e83a358f7526180cbfe49f758fe013e7187aad3fbb3ddbabb3085336a8ac3e. 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/QZZ8A2488502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824a577a74c6ca54e7b80e795b958c0bf79256d1da4c5d9de471190e4af39e58. 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/QZZ8A2488516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7ad30495d50520df44de862116fc5041f61ef554a8b730023df4a43732a95d. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZZ8A2488521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afda78078ce6778f3049002de9de4fe43255ad1af07db12d28affa183d02980. 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/QZZ8A2488533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8804ba626982923bfac23606c5c4cdf2f1b7a9d5bedbca70cde6dd93e7bd73fc. 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/QZZ8A2488538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277168fcb7fa4d3fcf073d9a59196e2ecafc3b9c4f2bffb761fb6d155be351a3. 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/QZZ8A2488544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2eac6cb558911e1f3b5dd26e58ba0e299f221fa48e2c835605299df3bcf08d2. 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/QZZ8A2488559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92972a6ba3d75abd64619db38e53ce6bb49d328a2d7fe43a7b0f0a149aba95c6. 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/QZZ8A2488565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201f6bda4c4591f939aaffa2119772334496fa3595c1d185f3c4054b78a2ae9f. 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/QZZ8A2488568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a84be7f68fe5a6a45fe0a754c327a8bb135d533f1685a2af3902bf00e424f73. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:30:01Z), 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/QZWV32381582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067b80dad01f0a0152a52efbbb8c6ad1e5136b5b31158df2b900ebce8566c939. 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/QZWV32381626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c662eea347bae40ccbe26c94edc8da0ee02a7bf8596f83a48b24a558a53111. 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/BCDST2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b9e295ca530ebc3f067c9483c5a0a357d37fbb401d6707805a3807fb30d2b6. 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/QZTVM2218241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb82f88845cd47292bf70cbd6135cb3bd60d6755d7210ee3c399c787bbaf636a. 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/BCDST2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f90c7e5dcc863c3a2a371f3f0fdf1a00fa06c9ac88f41c7df950f614ec11b7. 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/BCDST2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc021d2488e964fc83231c8903300126d82302c5deafc53bf7700dddf9238c99d. 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/BCDST2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c71a101799b340bc6d5abc6de14fb449196e5df8363a8d3bf472694966887d3. 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/BCDST2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9810e37e5654523e28a6afbc8b240c45576a0f918a658d4e7aec753128ab964c. 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/GX3Q92159533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b9ab054154e8ee3bfb27662f69788ae64b2cb4f3da0ef6426ad9e9481d017c. 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/QZ5AB2397956.